Plug-in connector device and vehicle seat

Abstract

The present invention discloses a plug-in connector device including a male terminal connector assembly. The male terminal connector assembly includes a headrest rod sleeve assembly, a male terminal connector, and a male terminal connector wire harness electrically connected to the male terminal connector. The headrest rod sleeve assembly is fixable to the seat back frame, and the male terminal connector is pre-mounted to the headrest rod sleeve assembly. The male terminal connector is configured to enter and exit the headrest rod sleeve assembly, following the female terminal connector, after being coupled with the headrest rod and the female terminal connector. Furthermore, the male terminal connector is configured to return to the headrest rod sleeve assembly and be pre-mounted after the female terminal connector is disconnected from the male terminal connector. The male terminal connector of the present invention can move up and down with the headrest rod (without disassembling the seat back), can be pulled out of the headrest rod sleeve assembly and reinserted, thereby preventing the male terminal connector from being easily damaged. Furthermore, the male and female terminal connectors of the present invention can be automatically locked and unlocked.

Description

Technical Field

[0001] Cross - reference to Related Applications This invention is based on applications with Chinese Patent Application No. CN202310758241.1 (filing date: June 26, 2023) and Chinese Patent Application No. CN202410176278.8 (filing date: February 8, 2024), and claims the priority of these. The disclosure content of these Chinese applications is incorporated herein in its entirety.

[0002] Technical Field The present invention relates to the technical field of seats, and in particular, to a plug - in connector device and a vehicle seat. The plug - in connector device is used for the headrest rod of the seat, and in particular, is a pre - attachable plug - in connector device.

Background Art

[0003] Currently, users have increasingly diverse requirements for automobile seats, and it is required that the headrest be equipped with audio functions, electric adjustment functions, and heating functions. When adopting the conventional connection method, the headrest with electrical functions cannot meet the requirement of being freely detachably attached.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

[0005] Japanese Patent Application JP2008-49820A (Patent Document 1) discloses an example of a lead wire connection structure for such a headrest. In this invention, a structure is adopted in which a first connector, which constitutes the connection terminal of a lead wire connected to an electrical component located on the headrest side, is coupled with a second connector, which constitutes the connection terminal of an extension lead wire located from the vehicle body side to the seat back side.

[0006] Specifically, the first connector is positioned to pass through the interior of the headrest support column, which is configured to permanently attach the headrest to the seatback. The headrest support column is formed to pass through the interior in a tubular shape, and the opening (located at the lower end) holds the first connector (through which the wiring is inserted). The second connector, on the other hand, is positioned at the bottom of the headrest support member into which the headrest support column is inserted and held, and is held by a retainer that is permanently integrated with the seatback. Therefore, the second connector is in a standby state, that is, when the headrest support column is subsequently inserted into the headrest support member, the second connector is ready to connect to the first connector held at the opening of the headrest support column. Here, the second connector is configured to detach from the retainer when pushed by the insertion force of the headrest support column after the insertion operation of the headrest support column, thereby connecting the first connector to the second connector.

[0007] However, in the vehicle seat disclosed in Japanese Patent Application JP2008-49820A (Patent Document 1), the retaining body for holding the second connector needs to be held next to the headrest support member.

[0008] Furthermore, Japanese Patent Application JP2011-140263A (Patent Document 2) discloses a headrest assembly structure in which a headrest is assembled to a seat back by inserting the headrest support into a retaining member assembled to the seat back. Even if the structure allows for assembly while the support is held in place by a temporary retaining member on the seat back side, a structure is provided that allows for efficient assembly of the headrest to the seat back. The headrest is configured to be able to be assembled to the seat back while being supported in a standby state by a standby member on the seat back side. The standby member is attached to the cover to hold the support in standby mode, and when the support is inserted into the retaining member with the standby member in place, the biasing member engages with the fitting portion of the support, and the standby member is also attached to the support by being assembled to the housing. Furthermore, when the support is inserted, the standby member is separated from the cover and attached only to the support.

[0009] U.S. Patent Application US10569685B2 (Patent Document 3) discloses a vehicle seat comprising a seat back having a mounting portion, a headrest having a headrest frame and electronic components, a first connector, and a second connector. The first connector has an engaging portion that engages with a hole in the headrest frame, a projection that engages with the second connector, and a first connector terminal that is electrically connected to the lead wires of the electronic components. The second connector has a first engaging piece that engages with a hole in the guide bracket from the outside of the guide bracket, a second engaging piece that engages with the projection of the first connector from the outside of the first connector, and a second connector terminal that is electrically connected to the lead wires routed inside the seat back and the first connector terminal. The engagement between the hole in the mounting portion and the first engaging piece of the second connector can be irreversibly released.

[0010] The above-mentioned conventional technology has the problem that, in the overall state of the vehicle (without disassembling the seat back), the headrest cannot be completely removed and freely reinserted. Furthermore, the male terminal connector of the above-mentioned conventional technology is easily damaged on the headrest guide rod. Moreover, with the above-mentioned conventional technology, the male terminal connector cannot be pre-installed during seat manufacturing. [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] One objective of the present invention is to provide a plug-in connector device and a vehicle seat equipped therewith, wherein the plug-in connector device enables the pre-installation of the male terminal connector during seat manufacturing, thereby solving the problem in the prior art that the male terminal connector cannot be pre-installed during seat manufacturing.

[0012] Furthermore, another object of the present invention is to provide a plug-in type connector device that can automatically lock and unlock male and female terminal connectors. [Means for solving the problem]

[0013] To achieve the above objective, the plug-in connector device of the present invention includes a male terminal connector assembly. The male terminal connector assembly includes a male terminal connector and a male terminal connector wire harness electrically connected to the male terminal connector, and is characterized in that the headrest rod sleeve assembly can be fixed to the seat back frame. The male terminal connector is pre-attached to the headrest rod sleeve assembly and is configured to enter and exit the headrest rod sleeve assembly following the female terminal connector after the male terminal connector is coupled to the headrest rod and the female terminal connector. Furthermore, the male terminal connector is configured to return to the headrest rod sleeve assembly after the female terminal connector is disconnected from the male terminal connector, returning to a pre-attached state. Preferably, the male terminal connector assembly is a pre-attachable male terminal connector assembly in which the male terminal connector is pre-attached.

[0014] In a preferred embodiment of the present invention, at least one locking piece is provided on the headrest rod sleeve assembly. The male terminal connector can be held in a pre-mounted state by being locked within the headrest rod sleeve assembly via the locking piece. Preferably, after the male terminal connector is coupled to the headrest rod and the female terminal connector, when the male terminal connector extends out of the headrest rod sleeve assembly following the female terminal connector, the locking piece can be flicked open, disengaging from contact with the male terminal connector and releasing the locking of the male terminal connector. Preferably, after the female terminal connector is disconnected from the male terminal connector, when the male terminal connector returns to its pre-mounted state, the locking piece can elastically return to its original position, re-locking the male terminal connector and holding it in the pre-mounted state.

[0015] In a preferred embodiment of the present invention, two locking pieces are provided. These two locking pieces are provided circumferentially on the headrest rod sleeve assembly.

[0016] In a preferred embodiment of the present invention, the headrest rod sleeve assembly is provided with two locking piece mounting portions in the circumferential direction. Each locking piece is attached to one of the locking piece mounting portions.

[0017] In a preferred embodiment of the present invention, the locking piece mounting portion includes a locking piece mounting groove configured for mounting a locking piece. Preferably, the locking piece mounting portion further includes a snap opening communicating with a first end of the locking piece mounting groove. The first end of the locking piece is provided with an elastic fixing portion, which, when the locking piece is mounted in the locking piece mounting groove, is fitted into the snap opening to prevent the locking piece from falling out of the locking piece mounting groove.

[0018] In a preferred embodiment of the present invention, a limiting portion is further provided at the first end of the locking piece. A limiting rib is provided at the first end of the locking piece mounting groove. After the locking piece is mounted in the locking piece mounting groove, the limiting rib can restrict the longitudinal movement of the locking piece by contacting the limiting portion.

[0019] In a preferred embodiment of the present invention, an outwardly projecting elastic snap projection is provided at an intermediate position of the locking piece. The elastic snap projection can hold the male terminal connector in a pre-installed position within the headrest rod sleeve assembly by engaging in locking contact with it. Preferably, after the male terminal connector is coupled with the headrest rod and the female terminal connector, as the male terminal connector follows the female terminal connector into and out of the headrest rod sleeve assembly, the elastic snap projection can elastically deform to disengage from or re-engage with the male terminal connector.

[0020] In a preferred embodiment of the present invention, a first upper inclined surface and a first lower inclined surface are provided above and below the elastic snap protrusion, respectively. When the male terminal connector contacts and acts on the first upper inclined surface, the elastic snap protrusion can be deformed, and by separating the elastic snap protrusion from the contact with the male terminal connector, the male terminal connector can follow the female terminal connector and withdraw from the headrest rod sleeve assembly. When the male terminal connector contacts and acts on the first lower inclined surface, the elastic snap protrusion can be deformed, and the male terminal connector can cross over the elastic snap protrusion and return to the pre-attached state, and is restricted to the pre-attached position by the elastic snap protrusion.

[0021] In a preferred embodiment of the present invention, a limiting groove is provided in the locking piece mounting groove. The limiting groove conforms to the shape of the elastic snap protrusion. The elastic snap protrusion can be prevented from protruding excessively by being restricted in movement within the limiting groove.

[0022] In a preferred embodiment of the present invention, the second end portion opposite to the first end portion of the locking piece is a free end.

[0023] In a preferred embodiment of the present invention, the male terminal connector includes a male terminal connector body having a male terminal mounting portion and a wire harness connection portion. The male terminal wire harness can be electrically connected to the wire harness connection portion. At least one fixing snap protrusion is provided on the outer periphery of the wire harness connection portion, and the fixing snap protrusion can restrict the male terminal connector to the pre-attached position by cooperating with the elastic snap protrusion. When the male terminal connector follows the female terminal connector and enters and exits the headrest rod sleeve assembly, the fixing snap protrusion can deform the elastic snap protrusion.

[0024] In a preferred embodiment of the present invention, a second upper inclined surface and a second lower inclined surface are respectively provided above and below the fixing snap projection. When the second lower inclined surface contacts the first lower inclined surface, the male terminal connector can be restricted to the pre - attachment position. Preferably, when the male terminal connector follows the female terminal connector and exits from the headrest rod sleeve assembly, the second lower inclined surface expands the locking piece outward through the first lower inclined surface, whereby the fixing snap projection disengages from the restriction of the elastic snap projection, and the male terminal connector can follow the female terminal connector and exit from the headrest rod sleeve assembly. Preferably, when the male terminal connector follows the female terminal connector and re - enters the headrest rod sleeve assembly and the second upper inclined surface contacts the first lower inclined surface, the second upper inclined surface expands the locking piece outward through the first lower inclined surface, whereby the fixing snap projection exceeds the elastic snap projection, and the male terminal connector can return to the pre - attachment position.

[0025] In a preferred embodiment of the present invention, the male terminal connector wire harness can be inserted into the wire harness connection part and fastened or clamped by a binding band or a clamp.

[0026] In a preferred embodiment of the present invention, at least one guide groove is provided in the headrest rod sleeve assembly. A locking piece mounting groove is provided in the guide groove. At least one guide structure is provided on the outer periphery of the wire harness connection part, the fixing snap projection is provided on the guide structure, and the guide structure can move within the guide groove.

[0027] In a preferred embodiment of the present invention, the guide structure is provided with a spring mounting groove. A clamp spring and a torsion spring are hinged together in the spring mounting groove. One end of the torsion spring acts on the guide structure, and the other end acts on the clamp spring. When the torsion spring is released, the clamp spring can lock the female terminal connector, thereby coupling the female terminal connector with the male terminal connector. When it is necessary to disconnect the female terminal connector from the male terminal connector, the clamp spring can be released from its locked connection with the female terminal connector by the action of an external force, and the torsion spring stores energy at this time.

[0028] In a preferred embodiment of the present invention, one end of the clamp spring is provided with an introduction portion and a locking portion. When viewed vertically in the installed state, the introduction portion is located above the locking portion. When the male terminal connector is inserted into the female terminal connector, the female terminal connector can extend one end of the clamp spring outward through the introduction portion, thereby allowing the female terminal connector to pass over the locking portion and fully engage with the male terminal connector, and be locked in place by the locking portion.

[0029] In a preferred embodiment of the present invention, an unlocking actuation part is provided at the other end of the clamp spring. An inclined edge is provided in the spring mounting groove. When the inclined edge interacts with the unlocking actuation part, on the one hand, the male terminal connector can be restricted to a pre-mounted position, and on the other hand, one end of the clamp spring can be moved in the release direction via the unlocking actuation part, thereby disengaging the locking part from the locked connection with the female terminal connector. Preferably, under the action of a torsion spring, the unlocking actuation part provided at the lower end of the clamp spring can contact the inclined edge in the spring mounting groove, thereby restricting the upward movement of the male terminal connector. Preferably, when the headrest rod is pulled upward, when the inclined edge in the spring mounting groove touches the unlocking actuation part provided at the lower end of the clamp spring, the unlocking actuation part is compressed inward, thereby expanding the locking part provided at the upper end of the clamp spring outward, thereby disengaging the locking part from the locked connection with the female terminal connector. Preferably, the unlocking actuation part has an arc-shaped structure.

[0030] In a preferred embodiment of the present invention, conductive rod mounting holes are provided in the male terminal mounting portion and the wire harness connection portion. The male terminal conductive rod can be inserted into the conductive rod mounting hole. A portion of the male terminal conductive rod inserted into the male terminal mounting portion is electrically connected to the female terminal connector, and a portion of the male terminal conductive rod inserted into the wire harness connection portion is electrically connected to the male terminal connector wire harness.

[0031] In a preferred embodiment of the present invention, the male terminal mounting portion is provided with at least one male terminal mounting groove in the circumferential direction. The male terminal mounting groove communicates radially with the conductive rod mounting hole and communicates with the outside of the male terminal mounting portion. The male terminal mounting groove extends along the axial direction of the conductive rod mounting hole. Preferably, a male terminal is installed in the male terminal mounting groove, and the male terminal is configured to be electrically connected to a male terminal conductive rod on the one hand and to a female terminal connector on the other hand.

[0032] In a preferred embodiment of the present invention, one end of the male terminal mounting groove extends to the wire harness connection portion. Preferably, male terminal restricting portions are provided at both ends of the male terminal mounting groove, and the male terminal can be axially restricted within the male terminal mounting groove by the male terminal restricting portions at both ends of the male terminal mounting groove.

[0033] In a preferred embodiment of the present invention, a snap edge is provided at one end of the male terminal, and an elastic snap portion is provided at the other end. The snap edge and the elastic snap portion contact the male terminal restricting portions at both ends of the male terminal mounting groove, thereby restricting the male terminal in the axial direction within the male terminal mounting groove.

[0034] In a preferred embodiment of the present invention, an elastic conductive contact portion is provided at an intermediate position on the male terminal. The elastic conductive contact portion can be electrically connected to the female terminal connector, and while the elastic conductive contact portion is electrically connected to the female terminal connector, the male terminal is electrically connected to the male terminal conductive rod by the pressure of the elastic conductive contact portion.

[0035] In a preferred embodiment of the present invention, a headrest rod locking member is fixedly installed in the headrest rod sleeve assembly. The headrest rod locking member is provided with a lock pin mounting hole, and a lock pin and a lock pin return spring are press-fitted into the lock pin mounting hole. One end of the lock pin return spring acts on the lock pin, and the other end of the lock pin return spring acts on the headrest rod locking member.

[0036] In a preferred embodiment of the present invention, the male terminal connector includes a male terminal connector body, at least one male terminal mounted on the male terminal connector body, and a male terminal connector wire harness. A male terminal connection terminal is formed at the bottom end of each male terminal. Preferably, a male terminal connector wire outlet is provided at the bottom of the male terminal connector body, and the male terminal connection terminal at the bottom end of the male terminal can be placed inside the male terminal connector wire outlet. Preferably, a snap-fitting opening is provided at the bottom of the headrest rod sleeve assembly, and during assembly, the male terminal connector wire outlet can be fitted into the snap-fitting opening, and the socket on the male terminal connector wire harness can be inserted into the male terminal connector wire outlet, thereby electrically connecting the male terminal connector wire harness to the male terminal.

[0037] The plug-in connector device of the present invention further includes a female terminal connector that can be installed on a headrest rod. After a male terminal connector is inserted into the female terminal connector and coupled with the female terminal connector, an electrical contact connection can be made between the male terminal connector and the female terminal connector.

[0038] In a preferred embodiment of the present invention, the female terminal connector includes a female terminal connector body, at least one female terminal mounted on the female terminal connector body, and a female terminal wire harness electrically connected to the female terminal. The female terminal connector body can be fitted and fixed into the internal space of the headrest rod. The female terminal wire harness can enter the headrest by passing through the internal space of the headrest rod and be electrically connected to electrical components provided in the headrest.

[0039] In a preferred embodiment of the present invention, the female terminal connector body is provided with at least one snap-fit ​​portion on its outer circumference, and the headrest rod is provided with at least one mounting hole in the circumferential direction. The snap-fit ​​portion can be fitted into the mounting hole, thereby fitting and fixing the female terminal connector body into the internal space of the headrest rod.

[0040] In a preferred embodiment of the present invention, the female terminal connector body is provided with an anti-misassembly rib. The headrest rod is provided with an anti-misassembly groove. The anti-misassembly rib can be positioned within the anti-misassembly groove, thereby allowing the female terminal connector body to be fitted and fixed in an anti-misassembly state within the internal space of the headrest rod.

[0041] In a preferred embodiment of the present invention, the female terminal connector body is provided with a male terminal connector insertion hole. The male terminal connector can be inserted into the male terminal connector insertion hole. Preferably, at least one female terminal mounting portion is provided circumferentially on the wall of the male terminal connector insertion hole. The female terminal can be installed on the female terminal mounting portion. After the male terminal connector is inserted into the male terminal connector insertion hole, the female terminal can be electrically connected to the male terminal on the male terminal connector.

[0042] In a preferred embodiment of the present invention, restricting edges are provided at both ends of the female terminal mounting portion. The female terminal can be restricted axially within the female terminal mounting portion by the restricting edges at both ends of the female terminal mounting portion.

[0043] In a preferred embodiment of the present invention, the female terminal includes an integrally formed female terminal support portion and a female terminal conductive contact portion. The female terminal support portion is bent from one end of the female terminal conductive contact portion to a state substantially parallel to the female terminal conductive contact portion, and then the female terminal support portion is fixed to the other end of the female terminal conductive contact portion. The female terminal support portion can contact the female terminal mounting portion, and the female terminal conductive contact portion can be electrically connected to a male terminal on a male terminal connector. Preferably, a female terminal wire harness weld portion is provided at the other end of the female terminal conductive contact portion, and the female terminal wire harness weld portion extends from the female terminal connector body and is welded to the female terminal wire harness.

[0044] In a preferred embodiment of the present invention, the female terminal support portion is fixedly connected to the other end of the female terminal conductive contact portion via a flange portion provided on the female terminal support portion.

[0045] In a preferred embodiment of the present invention, the conductive contact portion of the female terminal is provided with an elastic snap portion. The elastic snap portion can contact the limiting edge of the female terminal mounting portion adjacent to one end of the welded portion of the female terminal wire harness.

[0046] In a preferred embodiment of the present invention, the female terminal support portion is provided with at least one corrugated portion. The corrugated portion contacts the female terminal mounting portion, thereby imparting a predetermined elastic force to the conductive contact portion of the female terminal, and thereby achieving better electrical contact with the male terminal on the male terminal connector.

[0047] In a preferred embodiment of the present invention, the headrest rod sleeve assembly can be fitted into and secured to the seat back frame.

[0048] In a preferred embodiment of the present invention, the headrest rod sleeve assembly includes a headrest guide sleeve and a sleeve member. The headrest guide sleeve is configured to guide the headrest rod. The headrest guide sleeve and sleeve member can be fixed to the frame bracket via a socket connection between the headrest guide sleeve, a hollow frame bracket, and the sleeve member.

[0049] In a preferred embodiment of the present invention, the headrest guide sleeve can penetrate a hollow frame bracket, enter the sleeve member, and be fixedly connected to the sleeve member. In the installed state, the respective end faces of the frame bracket abut against the headrest guide sleeve and the sleeve member, thereby enabling the headrest rod sleeve assembly to be fixed in place by a socket.

[0050] In a preferred embodiment of the present invention, the sleeve member has a hollow portion at one end for receiving a frame bracket. The bottom surface of the hollow portion is configured to abut against the frame bracket. In the installed state, the side walls of the sleeve member located in the region of the hollow portion surround the frame bracket.

[0051] In a preferred embodiment of the present invention, the headrest guide sleeve can be fixedly connected to the sleeve member via a snap structure.

[0052] In a preferred embodiment of the present invention, a fitting opening is provided in the circumferential side wall of the sleeve member. The headrest guide sleeve is provided with an elastically deformable snap mechanism in the circumferential direction. The snap mechanism is configured to fit into the fitting opening of the sleeve member.

[0053] The object of the present invention can also be achieved by a vehicle seat including a plug-in connector device according to any embodiment of the present invention. [Effects of the Invention]

[0054] By employing the above technical means, the male terminal connector of the present invention can be pre-attached to the headrest rod sleeve assembly, move up and down following the headrest rod (without disassembling the seat back), be pulled out from the headrest rod sleeve assembly and reinserted, thereby preventing the male terminal connector from being easily damaged. Furthermore, the male and female terminal connectors of the present invention can be automatically locked and unlocked, thereby ensuring a secure electrical connection between them. [Brief explanation of the drawing]

[0055] [Figure 1] This is a schematic external view of the headrest guide rod assembly of the present invention. [Figure 2] This is a schematic diagram of the female terminal connector. [Figure 3]This is a schematic diagram of a seat frame in which the male terminal connector of the present invention is not pre-attached. [Figure 4] This is a schematic external view of the headrest rod sleeve assembly of the present invention. [Figure 5] This is a schematic external view of the male terminal connector wire harness of the present invention. [Figure 6] This is a schematic external view of a headrest guide rod assembly with the female terminal connector of the present invention pre-installed. [Figure 7] This is a cross-sectional view taken along the line A-A shown in Figure 6. [Figure 8] This is a schematic diagram of a seat frame with the male terminal connector of the present invention pre-installed. [Figure 9] Figure 8 is an enlarged schematic diagram of part I shown in the figure. [Figure 10] This is a cross-sectional view taken along the line B-B shown in Figure 9. [Figure 11] This is a schematic diagram of the seat frame structure where the female terminal connector is locked and connected after the headrest is installed. [Figure 12] Figure 11 is an enlarged schematic diagram of part I shown in Figure 11. [Figure 13] Figure 12 is an enlarged schematic diagram of part I shown in the figure. [Figure 14] This is a cross-sectional view taken along the line C-C shown in Figure 12. [Figure 15] This is a schematic diagram of a seat frame in which the headrest is continuously inserted into the male terminal connector, and the male terminal connector is separated from the headrest rod sleeve assembly. [Figure 16] Figure 15 is an enlarged schematic diagram of part I shown in the figure. [Figure 17] This is an enlarged schematic diagram of part I shown in Figure 16. [Figure 18] This is a cross-sectional view taken along the line D-D shown in Figure 16. [Figure 19] This is a schematic diagram of a seat frame in which the headrest is continuously inserted down to its lowest position. [Figure 20] Figure 19 is an enlarged schematic diagram of part I shown in the figure. [Figure 21] Figure 20 is an enlarged schematic diagram of part I shown in the figure. [Figure 22] This is a cross-sectional view taken along the line E-E shown in Figure 20. [Figure 23] This is a schematic diagram of a seat frame in which the headrest is pulled out to the position where the female and male terminal connectors are released. [Figure 24] This is an enlarged schematic diagram of part I shown in Figure 23. [Figure 25] Figure 24 is an enlarged schematic diagram of part I shown in the figure. [Figure 26] This is a cross-sectional view taken along the line F-F shown in Figure 24. [Figure 27] This is an exploded schematic diagram of the male terminal connector and headrest rod sleeve assembly of the present invention. [Figure 28] This is an exploded schematic diagram of the headrest guide rod assembly and female terminal connector of the present invention. [Figure 29] This is a schematic structural diagram of the locking piece of the present invention, viewed from one direction. [Figure 30] This is a schematic structural diagram of the locking piece of the present invention as viewed from another direction. [Figure 31] This is the first schematic structural diagram of the headrest rod sleeve assembly. [Figure 32] This is an enlarged cross-sectional view of part I shown in Figure 31. [Figure 33] This is a view along direction A shown in Figure 31 (including a partial cross-section). [Figure 34] This is a view along direction B shown in Figure 31 (including a partial cross-section). [Figure 35] This is a partial structural diagram of the headrest rod sleeve assembly (including a partial cross-section). [Figure 36] This is an enlarged cross-sectional view of part I shown in Figure 35. [Figure 37]This is a second schematic structural diagram of the headrest rod sleeve assembly. [Figure 38] This is an enlarged cross-sectional view of part I shown in Figure 37. [Figure 39] This is a view along direction A shown in Figure 37. [Figure 40] This is a third schematic structural diagram of the headrest rod sleeve assembly. [Figure 41] This is a schematic diagram of the headrest rod sleeve assembly fitted into the seat frame wire. [Figure 42] This is a cross-sectional view of the headrest rod sleeve assembly fitted into the seat frame wire. [Figure 43] This is a fourth schematic structural diagram of the headrest rod sleeve assembly. [Figure 44] Figure 43 is an enlarged cross-sectional view of part II. [Figure 45] This is a cross-sectional view taken along the line I-I shown in Figure 43. [Figure 46] This is the fifth schematic structural diagram of the headrest rod sleeve assembly. [Figure 47] This is a first cross-sectional view of the headrest rod sleeve assembly. [Figure 48] This is a second cross-sectional view of the headrest rod sleeve assembly. [Figure 49] This is a schematic diagram of the male terminal connector. [Figure 50] This is a view along direction A shown in Figure 49. [Figure 51] This is a first schematic assembly diagram of the male terminal connector body and the male terminal conductive rod. [Figure 52] This is a second schematic assembly diagram of the male terminal connector body and the male terminal conductive rod. [Figure 53] This is an enlarged cross-sectional view of part I shown in Figure 52. [Figure 54] This is a third schematic assembly diagram of the male terminal connector body and the male terminal conductive rod. [Figure 55]This is a fourth schematic assembly diagram of the male terminal connector body and the male terminal conductive rod. [Figure 56] This is a fifth schematic assembly diagram of the male terminal connector body and the male terminal conductive rod. [Figure 57] This is an enlarged view of part I shown in Figure 56. [Figure 58] This is a sixth schematic assembly diagram of the male terminal connector body and the male terminal conductive rod. [Figure 59] This is a cross-sectional view taken along the line J-J shown in Figure 58. [Figure 60] This is a schematic diagram of a torsion spring. [Figure 61] This is the first schematic diagram of a clamp spring. [Figure 62] This is a second schematic diagram of the clamp spring. [Figure 63] This is a third schematic diagram of the clamp spring. [Figure 64] This is a first schematic assembly diagram of a clamp spring and a torsion spring. [Figure 65] This is a second schematic assembly diagram of a clamp spring and a torsion spring. [Figure 66] This is a third schematic assembly diagram of a clamp spring and a torsion spring. [Figure 67] This is a fourth schematic assembly diagram of a clamp spring and a torsion spring. [Figure 67a] This is a schematic structural diagram of the clamp spring assembly of the present invention, viewed from one direction. [Figure 67b] This is a schematic structural diagram of the clamp spring assembly of the present invention, viewed from another direction. [Figure 67c] This is a schematic diagram illustrating the assembly of the clamp spring assembly and male terminal connector of the present invention. [Figure 67d] This is a first assembled cross-sectional view of the clamp spring assembly and male terminal connector of the present invention. [Figure 67e] This is a schematic diagram of the male terminal connector of the present invention. [Figure 67f] This is a second assembled cross-sectional view of the clamp spring assembly and male terminal connector of the present invention. [Figure 67g] This is a third assembled cross-sectional view of the clamp spring assembly and male terminal connector of the present invention. [Figure 68] This is a schematic diagram showing the male terminal as viewed from one direction. [Figure 69] This is a schematic diagram showing the male terminal as viewed from another direction. [Figure 70] This is a schematic diagram of the clamp spring and torsion spring attached to the male terminal connector body. [Figure 71] This is a cross-sectional view of the clamp spring and torsion spring attached to the male terminal connector body. [Figure 72] This is a first schematic diagram of the structure of a male terminal attached to the male terminal connector body. [Figure 73] This is a second schematic diagram of the male terminal attached to the male terminal connector body. [Figure 74] This is a cross-sectional view of a male terminal attached to the male terminal connector body. [Figure 75] This is an enlarged schematic diagram of part I shown in Figure 74. [Figure 76] This is a first schematic diagram of a male terminal connector inserted into a headrest rod sleeve assembly. [Figure 77] This is a second schematic diagram of a male terminal connector inserted into a headrest rod sleeve assembly. [Figure 78] This is a cross-sectional view taken along the line M-M shown in Figure 77. [Figure 79] This is a cross-sectional view taken along the N-N line shown in Figure 77. [Figure 80] This is a third schematic diagram of a male terminal connector inserted into a headrest rod sleeve assembly. [Figure 81] This is a cross-sectional view taken along the line O-O shown in Figure 80. [Figure 82] This is a cross-sectional view taken along the line P-P shown in Figure 80. [Figure 83] This is a fourth schematic diagram of a male terminal connector inserted into a headrest rod sleeve assembly. [Figure 84]This is a cross-sectional view taken along the line Q-Q shown in Figure 83. [Figure 85] This is a cross-sectional view taken along the R-R line shown in Figure 83. [Figure 86] This is a fifth schematic diagram of a male terminal connector inserted into a headrest rod sleeve assembly. [Figure 87] This is a cross-sectional view taken along the line S-S shown in Figure 86. [Figure 88] This is a schematic diagram of a female terminal connector inserted into a headrest rod. [Figure 89] This is a cross-sectional view taken along the line T-T shown in Figure 88. [Figure 90] This is a cross-sectional view taken along the line U-U shown in Figure 88. [Figure 91] This is a partial view of the headrest rod. [Figure 92] This is a first schematic external view of a female terminal connector. [Figure 93] This is a second schematic external view of the female terminal connector. [Figure 94] This is a first schematic structural diagram of the female terminal connector body. [Figure 95] This is a cross-sectional view taken along the line V-V shown in Figure 94. [Figure 96] This is a cross-sectional view taken along the line W-W shown in Figure 94. [Figure 97] This is a second schematic diagram of the female terminal connector body. [Figure 98] This is a schematic diagram showing the female terminal as viewed from one direction. [Figure 99] This is a schematic diagram showing the female terminal as viewed from another direction. [Figure 99a] This is a schematic diagram of the structure of another male terminal. [Figure 99b] This is a schematic diagram of the structure of another male terminal connector. [Figure 99c] This is a schematic diagram of the assembly of other male terminals and other male terminal connectors. [Figure 100] This is a schematic diagram of the female terminal connector. [Figure 101] This is a longitudinal cross-sectional view of a female terminal connector. [Figure 101a] This is a schematic diagram of the structure of another female terminal. [Figure 101b] This is a schematic diagram of the female terminal connector. [Figure 101c] This is a schematic diagram of the assembly of other female terminals and female terminal connectors. [Figure 102] This is a cross-sectional view of a female terminal connector. [Figure 103] This is a first schematic diagram of a headrest inserted into a seat. [Figure 104] This is a first schematic diagram of a locked male and female terminal connector. [Figure 105] This is a cross-sectional view taken along the line X-X shown in Figure 104. [Figure 106] This is a second schematic diagram of the locked male and female terminal connectors. [Figure 107] This is a second schematic diagram of a headrest inserted into a seat. [Figure 108] This is one schematic diagram of a male terminal connector that uses a locking piece. [Figure 109] This is a cross-sectional view taken along the Y-Y line shown in Figure 108. [Figure 110] This is a cross-sectional view taken along the line Z-Z shown in Figure 108. [Figure 111] This is a third schematic diagram of a headrest inserted into a seat. [Figure 112] This is one schematic diagram of a male terminal connector that pushes in a locking piece and a deformed locking piece. [Figure 113] This is a cross-sectional view taken along the line A1-A1 shown in Figure 112. [Figure 114] This is a cross-sectional view taken along the line B1-B1 shown in Figure 112. [Figure 115] This is a schematic diagram of a headrest rod that moves up and down relative to the headrest rod sleeve assembly. [Figure 116]This is a first schematic diagram of a headrest extended from the seat. [Figure 117] This is a schematic diagram of the headrest rod sleeve assembly that compresses the clamp spring. [Figure 118] This is a cross-sectional view taken along the line C1-C1 shown in Figure 117. [Figure 119] This is a second schematic diagram of the headrest extended from the seat. [Figure 120] This is a schematic diagram of a clamp spring that is locked and connected to a female terminal connector. [Figure 121] This is a cross-sectional view taken along the line C1-C1 shown in Figure 120. [Figure 122] This is a schematic diagram of a headrest fully extended from the seat. [Figure 123] This is a schematic diagram showing the state between the male terminal connector and the headrest rod sleeve assembly after the headrest has been fully extended from the seat. [Figure 124] This is a cross-sectional view taken along the line E1-E1 shown in Figure 123. [Figure 125] This is one of the schematic structural diagrams of another headrest rod sleeve assembly. [Figure 126] This is a first schematic diagram of another male terminal connector. [Figure 127] This is a second schematic diagram of another male terminal connector. [Figure 128] This is a schematic diagram of the structure of another male terminal. [Figure 129] This is a schematic view of the assembly with other headrest rod sleeve assemblies and other male terminal connectors. [Figure 130] This is a view along direction A shown in Figure 129. [Figure 131] This is a cross-sectional view taken along the line G1-G1 shown in Figure 130. [Figure 132] This is a schematic diagram of another male connector inserted into another female connector. [Figure 133] This is a cross-sectional view of the headrest rod at its lower limit position. [Figure 134] This is a cross-sectional view of the headrest rod at its upper limit position. [Figure 135] This is a schematic perspective view of the fixing connection structure for the headrest guide sleeve, frame bracket, and sleeve member. [Figure 136] This is a cross-sectional view taken along the line A-A shown in Figure 135. [Figure 137] This is a schematic perspective view of a headrest guide sleeve. [Figure 138] This is a cross-sectional view of the headrest guide sleeve. [Figure 139] This is a schematic perspective view of the frame bracket. [Figure 140] This is a schematic perspective view of the sleeve component from one direction. [Figure 141] This is a schematic perspective view of the sleeve member from another direction. [Figure 142] This is a cross-sectional view of the sleeve member. [Modes for carrying out the invention]

[0056] (Detailed explanation of the drawing) The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0057] Referring to Figures 27 and 29 to 87, the plug-in connector device having an automatic locking and unlocking mechanism shown in the figures mainly includes a male terminal connector assembly and a female terminal connector 100.

[0058] The male terminal connector assembly includes a headrest rod sleeve assembly 200 (see also Figure 4), a male terminal connector 300, and a male terminal connector wire harness 330 (see also Figure 5) that is electrically connected to the male terminal connector 300.

[0059] Referring particularly to Figures 3 and 40-42, the snap structure 210 is provided on the outer circumference of the headrest rod sleeve assembly 200, and the arc-shaped snap opening 211 is provided on the snap structure 210. When installed, the arc-shaped snap opening is fitted onto the steel wire 510 of the seat back frame 560, and the headrest rod sleeve assembly 200 can be fixed to the seat back.

[0060] Referring particularly to Figures 31-39 and 43-46, two guide grooves 240 are provided circumferentially on the headrest rod sleeve assembly 200. A locking piece mounting portion 220 is provided on each of the guide grooves 240. Each locking piece mounting portion 220 includes a locking piece mounting groove 221 and a snap opening 222, the snap opening 222 communicating with the first end of the locking piece mounting groove 221. A limiting rib 221a is provided on the first end of the locking piece mounting groove 221, and a limiting groove 221b is provided on the locking piece mounting groove 221. Furthermore, an inclined edge portion 241 is provided on each of the guide grooves 240.

[0061] Referring particularly to Figures 29 and 30, the elastic fixing portion 231 and the limiting portion 232 are provided at the first end of the locking piece 230. The second end of the locking piece 230 is a free end and is provided with a movable portion 233. An outwardly projecting elastic snap projection 234 is provided at the center of the locking piece 230. An upper inclined surface 235 (the first upper inclined surface described above) and a lower inclined surface 236 (the first lower inclined surface described above) are provided above and below the elastic snap projection 234, respectively.

[0062] There are two locking pieces 230, each fitted into one of the two locking piece mounting grooves 221. The elastic fixing portion 231 on the locking piece 230 fits into the snap opening 222 to prevent the locking piece 230 from falling out of the locking piece mounting groove 221. After the locking piece 230 is attached to the locking piece mounting groove 221, the limiting rib 221a contacts the limiting portion 232 to restrict the longitudinal movement of the locking piece 230.

[0063] The limiting groove 221b is shaped to fit the elastic snap projection 234, and the movement of the elastic snap projection 234 within the limiting groove 221b is restricted to prevent the elastic snap projection 234 from protruding excessively.

[0064] Referring to Figures 47 and 48, a gap Y is maintained between the movable part 233 of the locking piece 230 and the second end 221c of the locking piece mounting groove 221. When the elastic snap projection 234 of the locking piece 230 is crushed by an external force, the locking piece 230 undergoes compressive deformation and deforms as it moves upward and to the right, while its distance in the X direction decreases. Meanwhile, the movable part 233 of the locking piece 230 moves to the right, and the gap Y decreases.

[0065] Referring particularly to Figures 49 to 59, the male terminal connector 300 includes a male terminal connector body 310 having a male terminal mounting portion 311 and a wire harness connection portion 312. The male terminal mounting portion 311 is configured to mount the male terminal 360 shown in Figures 68 and 69. Conductive rod mounting holes 313 are provided in the male terminal mounting portion 311 and the wire harness connection portion 312, and the male terminal conductive rod 320 is inserted into the conductive rod mounting holes 313. The male terminal conductive rod 320 is made of a conductive material such as copper, thereby having excellent electrical conductivity.

[0066] The male terminal connector wire harness 330 is inserted into the male terminal conductive rod 320 and fastened or clamped by a cable tie 331 or clamp. The male terminal connector wire harness 330 is electrically connected to a portion of the male terminal conductive rod 320 that is inserted into the wire harness connection portion 312.

[0067] A pair of guide structures 314 are provided on the outer circumference of the wire harness connection portion 312. The guide structures 314 are preferably guided and move within the guide grooves 240 in the headrest rod sleeve assembly 200.

[0068] At least one of the guide structures 314 is provided with a spring mounting groove 314a, and each guide structure 314 is provided with a fixing snap projection 314b. An upper inclined surface 314ba (the second upper inclined surface described above) and a lower inclined surface 314bb (the second lower inclined surface described above) are provided on the upper and lower sides of the fixing snap projection 314b, respectively. The guide structure 314 is also provided with a pair of coaxial shaft holes 314c. The spring mounting groove 314a is provided with an inclined edge portion 314d, and a groove 314e is provided at the bottom of the spring mounting groove 314a. Each guide structure 314 includes two wall portions, and the fixing snap portion is provided on one of the wall portions, preferably on the upper side of that wall portion.

[0069] In one embodiment relating to torsion springs and clamp springs, referring particularly to Figure 60, the torsion spring 350 has a spring cylinder pin through hole 351 and a pair of elastic edges 352, 353.

[0070] Referring particularly to Figures 61 to 63, the clamp spring 340 has a U-shaped structure with a U-shaped groove 346 (when viewed from the side). One end of the clamp spring 340 is provided with an introduction portion 341 and a locking portion 342. When viewed from the vertical in the installed state, the introduction portion is located above the locking portion. The other end of the clamp spring 340 is provided with an unlocking operating portion 343 and a support edge 344. The introduction portion 341 has an inclined edge structure. The unlocking operating portion 343 has an arc-shaped structure. The locking portion 342 has a stepped structure. A pair of coaxial clamp spring cylindrical pin through holes 345 are provided at the center of the clamp spring 340.

[0071] Referring particularly to Figures 49, 64-67, 70, and 71, the clamp spring 340 and the torsion spring 350 are hinged together in the spring mounting groove 314a. The torsion spring 350 is mounted in the U-shaped groove 346 of the clamp spring 340. The clamp spring 340 and the torsion spring 350 can be mounted in the spring mounting groove 314a by passing a cylindrical pin 370 through a pair of axial holes 314c of the guide structure 314, a pair of clamp spring cylindrical pin through holes 345 of the clamp spring 340, and a spring cylindrical pin through hole 351 of the torsion spring 350, with the elastic edge 352 of the torsion spring 350 in contact with the support edge 344 on the clamp spring 340, and the elastic edge 352 of the torsion spring 350 fitted into the groove 314e.

[0072] In another embodiment relating to the torsion spring and clamp spring, referring to Figures 67a to 67g, the clamp spring and torsion spring are integrated to form a clamp spring assembly 340a. A pair of rotational positioning portions 341a are directly formed at the center of the clamp spring assembly 340a, and the clamp spring assembly 340a is mounted in the spring mounting groove 314a via the pair of rotational positioning portions 341a. An introduction portion 342a and a snap portion 343a are directly formed at one end of the clamp spring assembly 340a, and an elastic portion 344a is formed between the pair of rotational positioning portions 341a. After the clamp spring assembly 340a is mounted, the pair of rotational positioning portions 341a are fitted into a pair of axial holes 314c of the guide structure 314, and the elastic portion 344a acts on the bottom edge of the spring mounting groove 314a. A support portion 345a is formed at the other end of the clamp spring assembly 340a. When the support portion 345a contacts the inclined edge portion 241 in the headrest rod sleeve assembly 200, the inclined edge portion 241 rotates the clamp spring assembly 340a around a pair of rotational positioning portions 341a via the support portion 345a, preferably around the central axis of the pair of rotational positioning portions 341a, thereby causing the snap portion 343a to retract from the locking hole 115 of the female terminal connector body 110, and thereby separating the male terminal connector 300 from the female terminal connector 100. At this time, the elastic portion 344a is compressed and stores energy through deformation. When the support portion 345a is not in contact with the inclined edge portion 241 in the headrest rod sleeve assembly 200, the clamp spring assembly 340a is rotated around the pair of rotational positioning portions 341a, preferably around the central axis of the pair of rotational positioning portions 341a, relying on the restoring force of the elastic portion 344a, so that the snap portion 343a fits into the locking hole 115 of the female terminal connector body 110, thereby mating the male terminal connector 300 with the female terminal connector 100.

[0073] To smoothly fit the pair of rotational positioning parts 341a into the pair of shaft holes 314c of the guide structure 314, snap grooves 314f are provided in the guide structure 314 adjacent to the pair of shaft holes 314c, and the snap grooves 314f communicate with the shaft holes 314c. During installation, the pair of rotational positioning parts 341a are first fitted into the snap grooves 314f, and then fitted into the pair of shaft holes 314c via the snap grooves 314f.

[0074] To restrict the clamp spring assembly 340a, the spring mounting groove 314a is provided with an upper limiting structure 314g and a lower limiting structure 314h. The upper limiting structure 314g is used during installation to limit the reversal angle of the clamp spring assembly 340a, preventing the clamp spring assembly 340a from rotating counterclockwise at an excessive angle. The lower limiting structure 314h prevents the clamp spring assembly 340a from rotating clockwise at an excessive angle. This prevents the female terminal connector 100 and the male terminal mounting portion 311 from becoming unable to be inserted due to excessively small angles and magnitudes in the counterclockwise and clockwise directions of the clamp spring assembly 340a.

[0075] Referring particularly to Figures 68 and 69, each male terminal mounting portion 311 is provided with four male terminals 360. One end of each male terminal 360 is provided with a snap edge 361, and the other end is provided with an elastic snap portion 362. An elastic conductive contact portion 363 is provided at the center of each male terminal 360.

[0076] Referring particularly to Figures 51 to 59 and 70 to 75, the male terminal mounting section 311 has four male terminal mounting grooves 311a evenly spaced in the circumferential direction. Each male terminal mounting groove 311a communicates radially with the conductive rod mounting hole 313 and communicates with the outside of the male terminal mounting section 311. The male terminal mounting grooves 311a extend along the axial direction of the conductive rod mounting hole 313, and one end of each male terminal mounting groove 311a extends to the wire harness connection section 312. Corresponding male terminal limiting sections 311aa and 311ab are provided at both ends of the male terminal mounting grooves 311a, respectively.

[0077] The four male terminals 360 are made of a conductive material such as copper. Each male terminal is mounted in one of the four male terminal mounting grooves 311a and is electrically in contact with a portion of the male terminal conductive rod 320 inserted into the male terminal mounting portion 311. The snap edges 361 and elastic snap portions 362 at both ends of the male terminal 360 are in contact with the male terminal restricting portions 311aa and 311ab at both ends of the male terminal mounting groove 311a, respectively, thereby restricting the male terminal 360 axially within the male terminal mounting groove 311a.

[0078] Referring particularly to Figures 11 to 26, the headrest rod lock member 600 is fixedly attached to the headrest rod sleeve assembly 200. The headrest rod lock member 600 is provided with a lock pin mounting hole 630. The lock pin 610 and the lock pin return spring 620 are press-fitted into the lock pin mounting hole 630. One end of the lock pin return spring 620 acts on the lock pin 610, and the other end acts on the headrest rod lock member 600.

[0079] Referring to Figure 76, the male terminal connector 300 is inserted into the headrest rod sleeve assembly 200 in the direction indicated by arrow A in Figure 76.

[0080] Referring to Figures 77 to 87, in the process of inserting the male terminal connector 300 into the headrest rod sleeve assembly 200 in the direction indicated by arrow A in Figure 76, after the pair of guide structures 314 of the wire harness connection part 312 are inserted into the two guide grooves 240 on the headrest rod sleeve assembly 200, the upper inclined surface 314ba of the fixing snap projection 314b contacts the lower inclined surface 236 of the elastic snap projection 234 of the locking piece 230. The upper inclined surface 314ba of the fixing snap projection 314b causes the locking piece 230 to expand outward via the lower inclined surface 236 of the elastic snap projection 234 of the locking piece 230, so that the fixing snap projection 314b exceeds the elastic snap projection 234. After the fixing snap projection 314b passes over the elastic snap projection 234, the locking piece 230 returns to its original position due to the action of a restoring force, and the upper inclined surface 235 of the elastic snap projection 234 contacts the lower inclined surface 314bb of the fixing snap projection 314b, thereby preventing the male terminal connector 300 from falling. At the same time, the action of the torsion spring 350 causes the unlocking actuation part 343 at the lower end of the clamp spring 340 to contact the inclined edge 241 inside the headrest rod sleeve assembly 200, thereby preventing the male terminal connector 300 from shifting or moving upward. Through the cooperation of the fixing snap projection 314b and the elastic snap projection 234, and the cooperation of the unlocking actuation part 343 at the lower end of the clamp spring 340 and the inclined edge 241 inside the headrest rod sleeve assembly 200, the male terminal connector 300 is restricted to its pre-installed position (see also Figures 8-10).

[0081] Referring to Figures 28 and 88-101, the female terminal connector 100 includes a female terminal connector body 110, four female terminals 120, and a female terminal wire harness 130 (see also Figure 2).

[0082] Referring particularly to Figures 88 to 91, the headrest rod 500 is provided with two mounting holes 510 and one misassembly prevention groove 520 in the circumferential direction.

[0083] Referring particularly to Figures 92 and 93, the outer circumference of the female terminal connector body 110 is provided with two snap-fitting portions 111 and one mis-assembly prevention rib 112. After the female terminal connector 100 is inserted into the internal space 530 of the headrest rod 500, the two snap-fitting portions 111 are each fitted into the two mounting holes 510, and at the same time, the mis-assembly prevention rib 112 is positioned in the mis-assembly prevention groove 520, thereby fitting and fixing the female terminal connector 100 into the internal space 530 of the headrest rod 500 in a way that prevents mis-assembly (see also Figures 6 and 7).

[0084] To facilitate the insertion of the male terminal connector 300, the female terminal connector body 110 is provided with a male terminal connector insertion hole 113. Four female terminal mounting portions 114 are evenly distributed circumferentially on the wall of the male terminal connector insertion hole 113. Restricting edges 114a and 114b are provided at both ends of the female terminal mounting portions 114, respectively, and at the same time, two locking holes 115 are provided circumferentially on the female terminal connector body 110.

[0085] Referring particularly to Figures 98 and 99, each female terminal 120 includes an integrally formed female terminal support portion 121 and a female terminal conductive contact portion 122. The female terminal support portion 121 is bent from one end of the female terminal conductive contact portion 122 to a state substantially parallel to the female terminal conductive contact portion 122, and is then fixedly connected to the other end of the female terminal conductive contact portion 122 via a pair of flange portions 121a provided on the female terminal support portion 121. A female terminal wire harness welding portion 123 is provided at the other end of the female terminal conductive contact portion 122.

[0086] The female terminal conductive contact portion 122 is provided with an elastic snap portion 122a, and the female terminal support portion 121 is provided with two corrugated portions 121b (however, only one corrugated portion may be provided).

[0087] Referring to Figures 99a and 99c, there are four more male terminals 360b. Each male terminal 360b has a positioning portion 361b at one end and an elastic snap portion 362b at the other end, with a recess 363b between the positioning portion 361b and the elastic snap portion 362b. During assembly, the positioning portion 361b is fitted into the male terminal limiting portion 311aa, and the elastic snap portion 362b contacts the male terminal limiting portion 311ab, so that the male terminal 360b is axially restricted within the male terminal mounting groove 311a by the male terminal limiting portions 311aa and 311ab. Furthermore, a protrusion 311ac is provided at the center of the male terminal mounting groove 311a, and the protrusion 311ac is embedded in the recess 363b, so that the male terminal 360b is properly mounted by the male terminal mounting groove 311a.

[0088] Referring to Figure 101, the four female terminals 120 are each inserted into the four female terminal mounting portions 114 of the female terminal connector body 110. The bent portion 125 and the female terminal conductive contact portion 122 of the female terminal support portion 121 contact the limiting edge 114a, and the elastic snap portion 122a contacts the limiting edge 114b of the female terminal mounting portion 114 adjacent to one end of the female terminal wire harness welding portion 123, thereby attaching the female terminals 120 to the female terminal mounting portion 114 with their circumferential movement restricted.

[0089] The two corrugated portions 121b of the female terminal support portion 121 contact the bottom surface 114c of the female terminal mounting portion 114, and by applying a certain elastic force to the female terminal conductive contact portion 122, better electrical contact with the male terminal 360 on the male terminal connector 300 is achieved.

[0090] A female terminal sliding contact surface 122b is provided on the side of the female terminal conductive contact portion 122 that is away from the female terminal support portion 121.

[0091] The female terminal wire harness weld portion 123 extends from the female terminal connector body 110 and is welded to the female terminal wire harness 130. The female terminal wire harness 130 passes through the internal space 530 of the headrest rod 500 and enters the headrest 540, where it is electrically connected to electrical components (not shown) on the headrest 540 (see also Figure 1).

[0092] Referring to Figures 101a to 101c, each female terminal mounting portion 114 is further provided with four female terminals 120b. One end of each female terminal 120b is provided with a snap portion 121b, and the other end is provided with a positioning portion 122b. During assembly, the snap portion 121b contacts the limiting edge 114a, and the positioning portion 122b is inserted into the limiting edge 114b, thereby restricting the female terminal 120b axially within the female terminal mounting portion 114. Furthermore, an elastic contact portion 123b is provided between the snap portion 121b and the positioning portion 122b. The elastic contact portion 123b electrically contacts the sliding contact portion 364b between the positioning portion 361b of the male terminal 360b and the male terminal limiting portion 311aa, thereby increasing the contact area with the male and female terminals and increasing the amount of overcurrent.

[0093] Referring to Figures 103 to 106, when the male terminal connector 300 is inserted into the male terminal connector insertion hole 113 of the female terminal connector 100, and the bottom of the female terminal connector body 110 of the female terminal connector 100 contacts the introduction portion 341 on the clamp spring 340, the bottom of the female terminal connector body 110 pushes the introduction portion 341 on the clamp spring 340, causing the lock portion 342 on the clamp spring 340 to expand outward, the bottom of the female terminal connector body 110 of the female terminal connector 100 to pass the lock portion 342 on the clamp spring 340, and the torsion spring 350 stores energy at this time. After the bottom of the female terminal connector body 110 of the female terminal connector 100 has passed the lock portion 342 on the clamp spring 340, the female terminal connector 100 continues to move downward. The locking portion 342 on the clamp spring 340 returns to its original position due to the restoring force of the torsion spring 350 and is fitted into the locking hole 115 of the female terminal connector body 110, thereby automatically locking the female terminal connector 100 and the male terminal connector 300. At this time, the female terminal sliding contact surface 122b on the female terminal conductive contact portion 122 is in electrical contact with the male terminal 360 on the male terminal connector 300.

[0094] After the female terminal connector 100 and the male terminal connector 300 are automatically locked, the unlocking actuation part 343 at the lower end of the clamp spring 340 cooperates with the inclined edge 241 in the headrest rod sleeve assembly 200. Meanwhile, referring to Figures 107 to 110, the upper inclined surface 235 of the elastic snap projection 234 on the locking piece 230 contacts the lower inclined surface 314bb of the fixing snap projection 314b on the male terminal connector 300, thereby restricting the male terminal connector 300 to its pre-installed position within the headrest rod sleeve assembly 200.

[0095] At this time, the elastic conductive contact portion 363 on the male terminal 360 of the male terminal connector 300 is in electrical contact with the female terminal conductive contact portion 122 of the female terminal 120 of the female terminal connector 100. While the elastic conductive contact portion 363 is in electrical contact with the female terminal conductive contact portion 122, the male terminal 360 is in electrical contact with the male terminal conductive rod 320 due to the pressure of the elastic conductive contact portion 363.

[0096] Referring to Figures 11 to 14, after the female terminal connector 100 and the male terminal connector 300 are automatically locked together, the lock pin 610 in the headrest rod lock member 600 attached to the headrest rod sleeve assembly 200 is inserted into one of the lock grooves 550 of the headrest rod 500 by the action of the lock pin return spring 620, thereby locking the headrest rod 500.

[0097] Referring to Figures 15-18 and 111-115, when the headrest 540 needs to be adjusted downward, the locking pin 610 is manually pushed outward, compressing the locking pin return spring 620, which causes the locking pin 610 to retract from one of the locking grooves 550 of the headrest rod 500, allowing the headrest rod 500 to be inserted further downward.

[0098] As the headrest rod 500 is inserted further downward, the lower inclined surface 314bb of the fixing snap projection 314b on the male terminal connector 300 causes the elastic snap projection 234 of the locking piece 230 to expand outward via the upper inclined surface 235 of the elastic snap projection 234 of the locking piece 230, and the fixing snap projection 314b exceeds the elastic snap projection 234, thereby releasing the lock between the male terminal connector 300 and the headrest rod sleeve assembly 200. As a result, the headrest rod 500 moves downward in conjunction with the male terminal connector 300 and the female terminal connector 100, pulling it downward from the headrest rod sleeve assembly 200.

[0099] Referring to Figures 19 to 22, after the headrest 540 is inserted to its innermost position, the lock pin 610 in the headrest rod lock member 600 is inserted into the uppermost lock groove 550 of the headrest rod 500 by the action of the lock pin return spring 620, thereby locking the headrest rod 500.

[0100] Referring to Figures 23-26 and 116-124, when the headrest 540 needs to be pulled out from the seatback, the headrest 540 is lifted or raised by hand. The upward-moving headrest rod 500 pushes the locking pin 610 outward, compressing the locking pin return spring 620, which causes the locking pin 610 to retract from one of the locking grooves 550 of the headrest rod 500, allowing the headrest rod 500 to be pulled out.

[0101] During the upward extension process of the headrest rod 500, the inclined edge portion 241 within the headrest rod sleeve assembly 200 contacts the unlock operating portion 343 at the lower end of the clamp spring 340, pushing the unlock operating portion 343 inward. At this time, the locking portion 342 at the upper end of the clamp spring 340 expands outward and retracts from the locking hole 115 of the female terminal connector body 110 of the female terminal connector 100, thereby achieving automatic release of the female terminal connector 100 and the male terminal connector 300.

[0102] After the female terminal connector 100 and male terminal connector 300 are automatically released, if the headrest 540 is continued to be lifted, the headrest rod 500 rises further and is pulled out from the seat back. As the headrest rod 500 rises further and is pulled out from the seat back, the female terminal connector 100 continues to rise and is pulled out from the seat back, while the male terminal connector 300 remains in its pre-installed position within the headrest rod sleeve assembly 200.

[0103] Referring to Figures 125 to 134, another structure of the male terminal connector 300 is illustrated. The male terminal conductive rod 320 is omitted, and four male terminals 360a are directly attached to the male terminal connector body 310a. A male terminal connection terminal 361a is formed at the lower end of each male terminal 360a, and a male terminal connector wire outlet 312a is provided at the bottom of the male terminal connector body 310a. The male terminal connection terminals 361a at the lower ends of the four male terminals 360a are located within the male terminal connector wire outlet 312a. A snap-fit ​​opening 210a is provided at the bottom of the headrest rod sleeve assembly 200a. During assembly, the male terminal connector wire outlet 312a is fitted into the snap-fit ​​opening 210a, and the socket on the male terminal connector wire harness 330 is inserted into the male terminal connector wire outlet 312a, thereby electrically connecting the male terminal connector wire harness 330 to the four male terminals 360a.

[0104] Because the male terminal connector wire outlet 312a is fitted into the snap-fitting opening 210a, the headrest rod 500 can insert the female terminal connector 100 into the male terminal connector 300a and lock it in place, then move the male terminal connector 300a downward in conjunction with the headrest rod sleeve assembly 200a, allowing it to exit from the headrest rod sleeve assembly 200a. When it is necessary to pull out the female terminal connector 100, the limiting effect exerted by the snap-fitting opening 210a at the bottom of the headrest rod sleeve assembly 200a on the male terminal connector wire outlet 312a prevents the male terminal connector 300a from moving upward, keeping it in its pre-installed position within the headrest rod sleeve assembly 200a.

[0105] Referring to Figures 135 to 142, unlike the above embodiment in which the arc-shaped snap opening 211 of the snap structure 210 is fitted onto the steel wire 510 in the seat back frame 560 and the headrest rod sleeve assembly 200 is fitted onto the seat back and secured, in this embodiment the headrest rod sleeve assembly 200b includes a headrest guide sleeve 210b and a sleeve member 220b configured to guide the headrest rod 500. The headrest guide sleeve 210b and sleeve member 220b can be secured to the frame bracket 570 by inserting the headrest guide sleeve 210b through the frame bracket 570, fitting the sleeve member 220b onto the frame bracket 570 and the headrest guide sleeve 210b, and securing it to the headrest guide sleeve 210b. Here, a socket connection method is used for securing. The headrest guide sleeve 210b can pass through the hollow frame bracket 570 and enter the sleeve member 220b, and be fixedly connected to the sleeve member 220b. In the installed state, the frame bracket 570 has its end faces in contact with the headrest guide sleeve 210b and the sleeve member 220b. In the installed state, the frame bracket 570 is positioned between the headrest guide sleeve 210b and the sleeve member 220b.

[0106] The sleeve member 220b has a hollow portion 221b at one end for receiving the frame bracket 570, and the bottom surface of the hollow portion 221b is configured to abut against the frame bracket 570. In the installed state, the side walls of the sleeve member 220b located in the area of ​​the hollow portion 221b surround the frame bracket 570. The headrest guide sleeve 210b can be fixedly connected to the sleeve member 220b via a snap mechanism. For this purpose, the circumferential side wall of the sleeve member 220b is provided with a fitting opening 222b, and the headrest guide sleeve 210b is provided with an elastically deformable snap mechanism 211b in the circumferential direction. The snap mechanism 211b is configured to fit into the fitting opening 222b of the sleeve member 220b. The snap mechanism 211b is preferably configured as an elastic snap fitting portion.

[0107] The terms used herein are for the purpose of describing specific aspects only and are not intended to limit the scope of disclosure. The singular forms “a” and “the one” used herein are to include the plural form unless the context clearly indicates otherwise. It should be understood that the terms “including,” “comprising,” and other similar terms used in the application documents specifically indicate the presence of the described actions, elements, and / or components, but do not preclude the presence or addition of one or more other actions, elements, components, and / or combinations thereof. The term “and / or” used herein includes all combinations of one or more related items listed. In the description of the drawings, identical or similar reference numerals always indicate identical or similar elements.

[0108] The thicknesses of elements shown in drawings may be exaggerated for clarity. Furthermore, it should be understood that when an element is referred to as “on top of,” “joined,” or “connected” to another element, that element may be directly formed, joined, or connected to the other element, or one or more intermediate elements may exist between them. In contrast, when the expressions “directly on top,” “directly joined,” or “directly connected” are used herein, it means that no intermediate elements exist. Other terms used to describe relationships between elements, such as “between,” “directly between,” “attached,” and “directly attached,” and “adjacent,” should be interpreted similarly.

[0109] The terms “up,” “down,” “above,” “below,” “upper,” and “lower” used herein are intended to describe the relationship between one element, layer, or region and another element, layer, or region, as shown in the drawings. It should be understood that these terms include orientations other than those shown in the drawings of the apparatus.

[0110] It should be understood that while terms such as "first," "second," etc., may be used in this specification to describe different elements, these elements should not be limited by these terms. These terms are used solely to distinguish one element from another. Therefore, a first element may be referred to as a second element without departing from the teaching of the inventive concept.

[0111] Furthermore, it is conceivable that all embodiments disclosed herein may be combined in any way.

[0112] Finally, it should be noted that the embodiments described above are for the sole purpose of understanding the present invention and do not limit the scope of protection of the present invention. Those skilled in the art can modify the embodiments described above, and such modifications will not depart from the scope of protection of the present invention.

Claims

1. A plug-in type connector device including a headrest rod sleeve assembly, a male terminal connector, and a male terminal connector assembly including a male terminal connector wire harness electrically connected to the male terminal connector, The headrest rod sleeve assembly can be fixed to the seat back frame. The male terminal connector is pre-attached to the headrest rod sleeve assembly. The male terminal connector is configured to move in and out of the headrest rod sleeve assembly, following the female terminal connector, after the male terminal connector is coupled with the headrest rod and the female terminal connector. Furthermore, the plug-in type connector device is characterized in that the male terminal connector is configured to return to the headrest rod sleeve assembly after the female terminal connector has been detached from the male terminal connector, and to be in a pre-installed state.

2. The plug-in type connector device according to claim 1, characterized in that at least one locking piece is provided on the headrest rod sleeve assembly, and the male terminal connector is held in a pre-installed state by being locked within the headrest rod sleeve assembly via the locking piece, preferably, after the male terminal connector is coupled with the headrest rod and the female terminal connector, when the male terminal connector extends out of the headrest rod sleeve assembly following the female terminal connector, the locking piece is flicked open, disengaging from contact with the male terminal connector and releasing the locking of the male terminal connector, preferably, after the female terminal connector is detached from the male terminal connector, when the male terminal connector returns to the pre-installed state, the locking piece elastically returns to its original position, re-locking the male terminal connector and holding the male terminal connector in the pre-installed state.

3. The plug-in type connector device according to claim 2, characterized in that two locking pieces are provided, and the two locking pieces are provided circumferentially on the headrest rod sleeve assembly.

4. The plug-in type connector device according to claim 2 or 3, characterized in that the headrest rod sleeve assembly is provided with two locking piece mounting portions in the circumferential direction, and each locking piece is attached to one of the locking piece mounting portions.

5. The plug-in type connector device according to claim 4, wherein the locking piece mounting portion includes a locking piece mounting groove configured for mounting the locking piece, and preferably the locking piece mounting portion further includes a snap opening communicating with the first end of the locking piece mounting groove, and an elastic fixing portion is provided at the first end of the locking piece, and when the locking piece is mounted in the locking piece mounting groove, the elastic fixing portion is fitted into the snap opening, thereby preventing the locking piece from falling out of the locking piece mounting groove.

6. The plug-in connector device according to claim 5, further characterized in that a limiting portion is provided at the first end of the locking piece, a limiting rib is provided at the first end of the locking piece mounting groove, and after the locking piece is attached to the locking piece mounting groove, the limiting rib contacts the limiting portion, thereby restricting the longitudinal movement of the locking piece.

7. An outwardly projecting elastic snap projection is provided at an intermediate position of the locking piece, and the elastic snap projection can hold the male terminal connector in a pre-installed position within the headrest rod sleeve assembly by engaging in locking contact with the male terminal connector, preferably, after the male terminal connector is coupled with the headrest rod and the female terminal connector, when the male terminal connector follows the female terminal connector and enters and exits the headrest rod sleeve assembly, the elastic snap projection can elastically deform to disengage from contact with the male terminal connector or re-contact with the male terminal connector, characterized in that the plug-in type connector device according to claim 5 or 6.

8. A first upper inclined surface and a first lower inclined surface are provided above and below the elastic snap projection, respectively, and when the male terminal connector contacts and acts on the first upper inclined surface, the elastic snap projection can be deformed, and by disengaging the elastic snap projection from contact with the male terminal connector, the male terminal connector can follow the female terminal connector and exit the headrest rod sleeve assembly, and when the male terminal connector contacts and acts on the first lower inclined surface, the elastic snap projection can be deformed, and the male terminal connector can move beyond the elastic snap projection and return to the pre-installed state, and is restricted to the pre-installed position by the elastic snap projection, as described in claim 7.

9. The plug-in type connector device according to claim 8, characterized in that a limiting groove is provided in the locking piece mounting groove, the limiting groove conforms to the shape of the elastic snap projection, and the movement of the elastic snap projection is restricted within the limiting groove, thereby preventing the elastic snap projection from protruding excessively.

10. The plug-in connector device according to claim 5 or 6, characterized in that the second end of the locking piece facing the first end is a free end.

11. The plug-in type connector device according to claim 8, characterized in that the male terminal connector includes a male terminal connector body having a male terminal mounting portion and a wire harness connection portion, the male terminal wire harness is electrically connectable to the wire harness connection portion, at least one fixing snap projection is provided on the outer circumference of the wire harness connection portion, the fixing snap projection cooperates with the elastic snap projection to restrict the male terminal connector to the pre-installation position, and when the male terminal connector follows the female terminal connector and enters and exits the headrest rod sleeve assembly, the fixing snap projection can deform the elastic snap projection.

12. A second upper inclined surface and a second lower inclined surface are provided above and below the fixing snap projection, respectively. When the second lower inclined surface contacts the first lower inclined surface, the male terminal connector can be restricted to the pre-installed position. Preferably, when the male terminal connector follows the female terminal connector and retracts from the headrest rod sleeve assembly, the second lower inclined surface expands the locking piece outward via the first lower inclined surface, thereby releasing the fixing snap projection from the restriction of the elastic snap projection and the male terminal connector forward. The plug-in type connector device according to claim 11, characterized in that the male terminal connector can move out of the headrest rod sleeve assembly following the female terminal connector, preferably the male terminal connector moves back into the headrest rod sleeve assembly following the female terminal connector, and when the second upper inclined surface contacts the first lower inclined surface, the second upper inclined surface expands the locking piece outward via the first lower inclined surface, thereby allowing the fixing snap projection to pass over the elastic snap projection, and the male terminal connector to return to the pre-installed position.

13. The plug-in type connector device according to claim 11 or 12, characterized in that the male terminal connector wire harness can be inserted into the wire harness connection portion and fastened or clamped by a cable tie or clamp.

14. The plug-in type connector device according to claim 11 or 12, characterized in that the headrest rod sleeve assembly is provided with at least one guide groove, the guide groove is provided with the locking piece mounting groove, at least one guide structure is provided on the outer circumference of the wire harness connection portion, the fixing snap projection is provided on the guide structure, and the guide structure is movable within the guide groove.

15. The plug-in type connector device according to claim 14, wherein the guide structure is provided with a spring mounting groove, in which a clamp spring and a torsion spring are hinge-connected, one end of the torsion spring acts on the guide structure, and the other end of the torsion spring acts on the clamp spring, and when the torsion spring is released, the clamp spring can lock the female terminal connector, thereby coupling the female terminal connector with the male terminal connector, and when it is necessary to disconnect the female terminal connector from the male terminal connector, the clamp spring can be released from the locked connection with the female terminal connector by the action of an external force, and the torsion spring stores energy at this time.

16. The plug-in type connector device according to claim 15, characterized in that one end of the clamp spring is provided with an introduction portion and a locking portion, and when viewed from a vertical direction in the installed state, the introduction portion is located above the locking portion, and when the male terminal connector is inserted into the female terminal connector, the female terminal connector can extend one end of the clamp spring outward through the introduction portion, thereby the female terminal connector passes over the locking portion, the female terminal connector is completely coupled with the male terminal connector and locked by the locking portion.

17. An unlocking mechanism is provided at the other end of the clamp spring, and an inclined edge is provided in the spring mounting groove. When the inclined edge interacts with the unlocking mechanism, the male terminal connector can be restricted to the pre-mounted position, and one end of the clamp spring can be moved in the release direction via the unlocking mechanism, thereby disengaging the lock from the locked connection with the female terminal connector. Preferably, under the action of the torsion spring, the unlocking mechanism provided at the lower end of the clamp spring contacts the inclined edge in the spring mounting groove. The plug-in type connector device according to claim 16, wherein the upward movement of the male terminal connector can be restricted, and preferably, when the headrest rod is pulled upward, the inclined edge in the spring mounting groove touches the unlock operating part provided at the lower end of the clamp spring, thereby compressing the unlock operating part inward and expanding the locking part provided at the upper end of the clamp spring outward, thereby disengaging the locking part from the locked connection with the female terminal connector, and preferably the unlock operating part has an arc-shaped structure.

18. The plug-in type connector device according to claim 11 or 12, characterized in that the male terminal mounting portion and the wire harness connection portion are provided with conductive rod mounting holes, the male terminal conductive rod can be inserted into the conductive rod mounting holes, a portion of the male terminal conductive rod inserted into the male terminal mounting portion is electrically connected to the female terminal connector, and a portion of the male terminal conductive rod inserted into the wire harness connection portion is electrically connected to the male terminal connector wire harness.

19. The plug-in type connector device according to claim 18, characterized in that the male terminal mounting portion is provided with at least one male terminal mounting groove in the circumferential direction, the male terminal mounting groove is radially connected to the conductive rod mounting hole and is connected to the outside of the male terminal mounting portion, the male terminal mounting groove extends along the axial direction of the conductive rod mounting hole, preferably a male terminal is installed in the male terminal mounting groove, and the male terminal is configured to be electrically connected to the male terminal conductive rod on one side and to the female terminal connector on the other side.

20. The plug-in type connector device according to claim 19, characterized in that one end of the male terminal mounting groove extends to the wire harness connection portion, preferably, male terminal restricting portions are provided at both ends of the male terminal mounting groove, and the male terminal can be restricted in the axial direction within the male terminal mounting groove by the male terminal restricting portions at both ends of the male terminal mounting groove.

21. The plug-in type connector device according to claim 20, characterized in that a snap edge is provided at one end of the male terminal, an elastic snap portion is provided at the other end of the male terminal, and the snap edge and the elastic snap portion contact the male terminal restricting portions at both ends of the male terminal mounting groove, thereby restricting the male terminal in the axial direction within the male terminal mounting groove.

22. A plug-in type connector device according to any one of claims 19 to 21, characterized in that an elastic conductive contact portion is provided at an intermediate position of the male terminal, the elastic conductive contact portion can be electrically connected to the female terminal connector, and while the elastic conductive contact portion is electrically connected to the female terminal connector, the male terminal is electrically connected to the male terminal conductive rod by the pressure of the elastic conductive contact portion.

23. A plug-in type connector device according to claim 1 or 2, characterized in that a headrest rod locking member is fixedly installed in the headrest rod sleeve assembly, a lock pin mounting hole is provided in the headrest rod locking member, a lock pin and a lock pin return spring are press-fitted into the lock pin mounting hole, one end of the lock pin return spring acts on the lock pin, and the other end of the lock pin return spring acts on the headrest rod locking member.

24. The plug-in type connector device according to claim 1, wherein the male terminal connector includes a male terminal connector body, at least one male terminal installed on the male terminal connector body, and a male terminal connector wire harness, and a male terminal connection terminal is formed at the bottom end of each male terminal, preferably a male terminal connector wire outlet is provided at the bottom of the male terminal connector body, and the male terminal connection terminal at the bottom end of the male terminal can be placed inside the male terminal connector wire outlet, preferably a snap fitting opening is provided at the bottom of the headrest rod sleeve assembly, and during assembly the male terminal connector wire outlet can be fitted into the snap fitting opening, and a socket on the male terminal connector wire harness can be inserted into the male terminal connector wire outlet, thereby electrically connecting the male terminal connector wire harness to the male terminal.

25. The plug-in connector device according to claim 1 or 2, further comprising a female terminal connector that can be installed on the headrest rod, wherein the male terminal connector can be inserted into the female terminal connector and coupled with the female terminal connector, and an electrical contact connection can be made between the male terminal connector and the female terminal connector after that.

26. The plug-in type connector device according to claim 25, wherein the female terminal connector includes a female terminal connector body, at least one female terminal installed on the female terminal connector body, and a female terminal wire harness electrically connected to the female terminal, the female terminal connector body can be fitted and fixed into the internal space of the headrest rod, and the female terminal wire harness can enter the headrest by passing through the internal space of the headrest rod and be electrically connected to an electrical component provided on the headrest.

27. The plug-in type connector device according to claim 26, characterized in that at least one snap-fit ​​portion is provided on the outer circumference of the female terminal connector body, at least one mounting hole is provided in the circumferential direction of the headrest rod, the snap-fit ​​portion can be fitted into the mounting hole, and thereby the female terminal connector body is fitted and fixed in the internal space of the headrest rod.

28. The plug-in type connector device according to claim 26 or 27, characterized in that the female terminal connector body is provided with an anti-misassembly rib, the headrest rod is provided with an anti-misassembly groove, the anti-misassembly rib can be positioned within the anti-misassembly groove, thereby the female terminal connector body is fitted and fixed in the internal space of the headrest rod in an anti-misassembly state.

29. The plug-in type connector device according to claim 26 or 27, characterized in that the female terminal connector body is provided with a male terminal connector insertion hole, the male terminal connector can be inserted into the male terminal connector insertion hole, preferably at least one female terminal mounting portion is provided circumferentially on the wall of the male terminal connector insertion hole, the female terminal can be installed on the female terminal mounting portion, and after the male terminal connector is inserted into the male terminal connector insertion hole, the female terminal can be electrically connected to the male terminal on the male terminal connector.

30. The plug-in type connector device according to claim 29, characterized in that a limiting edge is provided at both ends of the female terminal mounting portion, and the female terminal can be restricted in the axial direction within the female terminal mounting portion by the limiting edges at both ends of the female terminal mounting portion.

31. The female terminal includes an integrally formed female terminal support portion and a female terminal conductive contact portion, the female terminal support portion is bent from one end of the female terminal conductive contact portion to a state substantially parallel to the female terminal conductive contact portion, the female terminal support portion is fixed to the other end of the female terminal conductive contact portion, the female terminal support portion can contact the female terminal mounting portion, the female terminal conductive contact portion can be electrically connected to the male terminal on the male terminal connector, preferably a female terminal wire harness welding portion is provided at the other end of the female terminal conductive contact portion, the female terminal wire harness welding portion extends from the female terminal connector body and is welded to the female terminal wire harness, characterized in that the plug-in type connector device according to claim 29.

32. The plug-in type connector device according to claim 31, characterized in that the female terminal support portion is fixedly connected to the other end of the female terminal conductive contact portion via a flange portion provided on the female terminal support portion.

33. The plug-in type connector device according to claim 31 or 32, characterized in that the female terminal conductive contact portion is provided with an elastic snap portion, and the elastic snap portion can contact the limiting edge of the female terminal mounting portion adjacent to one end of the female terminal wire harness welding portion.

34. The plug-in connector device according to claim 31 or 32, characterized in that the female terminal support portion is provided with at least one corrugated portion, and the corrugated portion can contact the female terminal mounting portion to impart a predetermined elastic force to the female terminal conductive contact portion, thereby achieving better electrical contact with the male terminal on the male terminal connector.

35. The plug-in connector device further includes a female terminal connector that can be installed on the headrest rod, wherein the male terminal connector can be inserted into the female terminal connector and coupled with the female terminal connector, after which an electrical contact connection can be made between the male terminal connector and the female terminal connector, the female terminal connector includes a female terminal connector body that can be fitted and fixed in the internal space of the headrest rod, the female terminal connector body is provided with at least one locking hole in the circumferential direction, and after the male terminal connector is inserted into the male terminal connector insertion hole, the locking portion of one end of the clamp spring in the male terminal connector is embedded in the locking hole, thereby locking the male terminal connector and the female terminal connector, and when the locking is released, the locking portion of one end of the clamp spring in the male terminal connector retracts from the locking hole, thereby releasing the locking, as described in claim 16 or 17.

36. The plug-in type connector device according to claim 1, characterized in that the headrest rod sleeve assembly can be fitted into and fixed to the seat back frame.

37. The plug-in connector device according to claim 1, wherein the headrest rod sleeve assembly includes a headrest guide sleeve and a sleeve member, the headrest guide sleeve is configured to guide the headrest rod, and the headrest guide sleeve and the sleeve member can be fixed to the frame bracket via a socket connection between the headrest guide sleeve, the hollow frame bracket, and the sleeve member.

38. The plug-in type connector device according to claim 37, characterized in that the headrest guide sleeve can penetrate the hollow frame bracket and enter the sleeve member, and can be fixedly connected to the sleeve member, and in the installed state, the respective end faces of the frame bracket abut against the headrest guide sleeve and the sleeve member, thereby enabling the headrest rod sleeve assembly to be restricted and fixed by the socket.

39. The plug-in type connector device according to claim 38, characterized in that the sleeve member has a hollow portion at one end for receiving the frame bracket, the bottom surface of the hollow portion is configured to abut against the frame bracket, and in the installed state, the side wall of the sleeve member located in the region of the hollow portion surrounds the frame bracket.

40. The plug-in type connector device according to claim 38 or 39, characterized in that the circumferential side wall of the sleeve member is provided with an opening for fitting, the headrest guide sleeve is provided with an elastically deformable snap mechanism in the circumferential direction, the snap mechanism is configured to fit into the opening for fitting of the sleeve member, and preferably the snap mechanism is configured as an elastic snap fitting portion.

41. A vehicle seat characterized by including a plug-in type connector device according to any one of claims 1 to 40.

Images