Seat headrest circuit connection improved structure

Abstract

The utility model discloses an improved seat headrest circuit connection structure which comprises a headrest rod, a plug, a plug fixing seat, a fixing guide sleeve fixed on a backrest framework and a headrest guide sleeve installed in the fixing guide sleeve, elastic pieces are fixedly arranged at the left end and the right end of the plug fixing seat respectively, and the elastic pieces extend downwards to the two sides of the plug. The bottom end of the elastic piece is in a V shape and concaves inwards to form blocking points, limiting grooves matched with the blocking points are formed in the two ends of the plug, the two blocking points are located in the two limiting grooves in a one-to-one up-and-down mode, when the plug is driven to move downwards, the plug can extrude the elastic piece outwards to enable the elastic piece to elastically deform, the blocking points can slide out of the corresponding limiting grooves, and therefore the plug and the plug fixing base are separated. The elastic piece is additionally arranged on the plug fixing seat, when the headrest rod is pulled out, the plug is fixed on the plug fixing seat through magnetic attraction and is clamped and limited on the plug fixing seat through matching of the limiting groove and the blocking point, the overall connection stability is high, and the risk that the plug falls off from the plug fixing seat is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to an improved structure for the circuit connection of a seat headrest. Background Technology

[0002] As residents' living standards improve, car configurations are becoming increasingly sophisticated. With the advent of the electrification era, the electrical systems in vehicles are becoming more advanced, and headrests with integrated electrical devices are becoming more common, such as music headrests. Music headrests connect headrest speakers to the vehicle's amplifier via a wiring harness, enabling music playback from the headrest. However, currently, music headrests on the market are all one-piece designs. Because the wiring harness connecting the headrest speakers and the vehicle's amplifier does not have a detachable function, music headrests cannot be quickly plugged in and out.

[0003] Patent CN202410536204.0 discloses a circuit plug-in structure for a car seat headrest, including a headrest rod, a fixing guide sleeve fixed to the backrest frame, and a headrest guide sleeve installed inside the fixing guide sleeve. A headrest rod connecting terminal is installed at the bottom opening of the headrest rod. The headrest rod connecting terminal has a first magnetic ring and a first circuit contact. A plug is magnetically fixed below a plug fixing seat and located on the travel path of the headrest rod. The plug has a second magnetic ring and a second circuit contact. When the headrest rod is inserted into the headrest guide sleeve and is in the use position, the first and second magnetic rings are magnetically attracted to each other, and the first and second circuit contacts are in contact, making the headrest rod connecting terminal and the plug in a circuit-connected state. When the headrest rod is adjusted vertically within the use position range, the plug separates from the plug fixing seat, and the headrest rod can move the plug up and down together. Although this solution solves the problem of the inability to quickly plug and unplug music headrests, when the headrest rod is pulled out, the plug and plug fixing seat are only magnetically fixed, resulting in low stability and the plug is prone to falling off. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention aims to provide an improved structure for the circuit connection of a seat headrest, so as to solve the problem that the plug is easy to fall off the plug fixing seat when the headrest rod is pulled out.

[0005] To achieve the above objectives, this utility model proposes an improved structure for the circuit connection of a seat headrest, including a headrest rod, a plug, a plug fixing seat, a fixing guide sleeve fixed to the backrest frame, and a headrest guide sleeve installed inside the fixing guide sleeve. A headrest rod connecting terminal is installed at the bottom opening of the headrest rod. The headrest rod connecting terminal is provided with a first magnetic ring and a first circuit contact. The plug fixing seat is fixed below the fixing guide sleeve. The plug is magnetically fixed below the plug fixing seat and located on the travel path of the headrest rod. The plug is provided with a second magnetic ring and a second circuit contact. When the headrest rod is inserted into the headrest guide sleeve and is in the use position, the first magnetic ring and the second magnetic ring are magnetically connected, and the first circuit contact and the second circuit contact are in contact, so that the headrest rod connecting terminal and the plug are in a circuit connection state. When the headrest rod is adjusted up and down within the use position range, the plug and the plug fixing seat are separated, and the headrest rod can drive the plug to move up and down together.

[0006] The plug fixing base has spring pieces fixed at both ends. The spring pieces extend downward to both sides of the plug, and the bottom end of the spring piece is V-shaped and concave to form a stop point. The plug has limiting grooves at both ends that match the stop points. The two stop points are located in the two limiting grooves, one above the other. When the plug is driven to move downward, the plug can squeeze the spring pieces outward to make them elastically deform, so that the stop points can slide out from the corresponding limiting grooves, thereby realizing the separation of the plug from the plug fixing base.

[0007] In the above scheme: the plug includes a plug body and a plug terminal. The plug body is sleeved on the plug terminal. The second magnetic ring is sleeved between the plug body and the plug terminal. The second circuit contact is set on the top surface of the plug terminal. The two limiting grooves are respectively arranged at both ends of the plug body. The design is ingenious and easy to install.

[0008] In the above solution: the plug fixing base includes a fixing base body, and the upper end of the spring piece is fixed to the fixing base body by an inverted snap structure. The structure is simple and easy to install.

[0009] In the above solution: The top surfaces at both ends of the fixing base body are provided with locking holes. The upper end of the spring piece is bent inward into an inverted U-shape, and a buckle is provided on the bent section. The buckle cooperates with the locking holes to form a buckle structure, thereby realizing the installation and fixing of the spring piece. Using a buckle structure for installation and fixing makes it convenient to replace the spring piece after its elasticity fails.

[0010] The above solution also includes a fixing seat connector, which is welded to the fixing guide sleeve, and the fixing seat body is fixed to the fixing seat connector. The structure is simple and easy to install.

[0011] In the above solution: the headrest rod connection terminal includes a headrest wiring harness and an end assembly that are connected to each other. The end assembly includes an end sleeve and a wiring harness terminal head. The end sleeve is sleeved on the wiring harness terminal head. The first magnetic ring is sleeved between the end sleeve and the wiring harness terminal head, and the bottom surfaces of the three are flat. The first circuit contact is set on the bottom surface of the wiring harness terminal head. The design is ingenious and easy to install.

[0012] The above solution also includes a spring-loaded buckle, which includes a snap-fit ​​body, a horizontal mounting hole on the plug body, and the snap-fit ​​body is movably limited in the horizontal mounting hole. The snap-fit ​​body has a ring-shaped structure with protrusions on its inner wall and a third magnetic block on its exposed outer wall. The end sleeve has a groove on its side that matches the protrusions. A compression spring is provided between the snap-fit ​​body and the plug body, and the compression spring has an elastic force to push the protrusions into the groove.

[0013] The side wall of the fixing base body is provided with a fourth magnetic block corresponding to the third magnetic block for magnetic attraction with it, so that the plug can be magnetically connected to the fourth magnetic block through the third magnetic block. When the third magnetic block and the fourth magnetic block are magnetically connected, the magnetic force between them can overcome the spring force of the compression spring, and the protrusion can be dislodged from the groove. When the third magnetic block and the fourth magnetic block are separated, the protrusion can be locked into the groove under the action of the compression spring, so as to stably and firmly realize the connection between the headrest rod and the plug, and will not loosen due to external force and vibration.

[0014] The bottom surface of the horizontal section of the fixing body is provided with a fifth magnetic block, and the top surface of the plug body is provided with a sixth magnetic block corresponding to the fifth magnetic block for magnetic attraction with it. When the third magnetic block and the fourth magnetic block are magnetically attracted to each other, the fifth magnetic block is also magnetically attracted to the sixth magnetic block, thereby fixing the plug to the plug fixing body.

[0015] The bottom surface of the wire harness terminal head is also provided with a first positioning hole, the top surface of the plug terminal is provided with a first positioning post corresponding to the first positioning hole, the top surface of the plug body is provided with a second positioning hole, and the bottom surface of the transverse section of the fixing base body is provided with a second positioning post corresponding to the second positioning hole.

[0016] The first circuit contact is a conical bottom recess structure, and the second circuit contact is an elastically expandable columnar structure that matches the conical bottom recess structure.

[0017] The beneficial effects of this utility model are:

[0018] A spring clip was added to the plug holder. When the headrest rod is pulled out, the plug is not only magnetically fixed to the plug holder, but also locked in place by the limiting groove and the stop point. The overall connection is highly stable, effectively reducing the risk of the plug falling off the plug holder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is an assembly diagram of the headrest rod connection terminal.

[0021] Figure 3 This is an exploded view of the headrest rod connection terminal.

[0022] Figure 4 This is an enlarged view of the wire harness terminal head.

[0023] Figure 5 It is an assembly drawing of the backrest frame, fixed guide sleeve and fixed seat connector.

[0024] Figure 6 This is a schematic diagram of the plug mounting bracket installation.

[0025] Figure 7 This is a bottom view of the plug holder.

[0026] Figure 8 This is a rear view of the plug holder.

[0027] Figure 9 This is a front view of the plug holder.

[0028] Figure 10 This is a schematic diagram of the shrapnel structure.

[0029] Figure 11 This is an assembly diagram of the plug.

[0030] Figure 12 This is a detailed diagram of a spring-loaded snap-on mechanism.

[0031] Figure 13 This is a detailed diagram of the plug.

[0032] Figure 14 This is a schematic diagram of the limiting groove.

[0033] Figure 15 This is an enlarged view of the plug terminals.

[0034] Figure 16 This is a cross-sectional view (usage location range) after the headrest rod connection terminal and plug are connected. Detailed Implementation

[0035] like Figure 1 As shown in Figure 16, an improved structure for the circuit connection of a seat headrest mainly consists of a headrest rod 1, a plug 8, a plug fixing seat 6, a fixing guide sleeve 3 fixed on the backrest frame, and a headrest guide sleeve 4 installed in the fixing guide sleeve 3.

[0036] A headrest rod connecting terminal 2 is installed at the bottom opening of the headrest rod 1. The headrest rod connecting terminal 2 is provided with a first magnetic ring 204 and a first circuit contact 207. The plug fixing seat 6 is fixed below the fixing guide sleeve 3. The plug 8 is magnetically fixed below the plug fixing seat 6 and is located on the travel path of the headrest rod 1. The plug 8 is provided with a second magnetic ring 805 and a second circuit contact 802.

[0037] When the headrest rod 1 is inserted into the headrest guide sleeve 4 and is in the use position, the first magnetic ring 204 and the second magnetic ring 805 are magnetically attracted to each other, and the first circuit contact 207 and the second circuit contact 802 are in contact, so that the headrest rod connecting terminal 2 and the plug 8 are in a circuit connected state. When the headrest rod 1 is adjusted up and down within the use position range, the plug 8 is separated from the plug fixing seat 6, and the headrest rod 1 can drive the plug 8 to move up and down together.

[0038] The plug fixing base 6 has spring pieces 9 fixed at its left and right ends respectively. The spring pieces 9 extend downward to both sides of the plug 8, and the bottom end of the spring piece 9 is V-shaped and concave to form a stop point 901. The plug 8 has limiting grooves 8011 at both ends that match the stop points 901. The two stop points 901 are located in the two limiting grooves 8011, one above the other. When the plug 8 is driven to move downward, the plug 8 can squeeze the spring pieces 9 outward to make them elastically deform, so that the stop point 901 can slide out of the corresponding limiting groove 8011, thereby separating the plug 8 from the plug fixing base 6. Conversely, when the plug 8 moves upward to the limit position under the action of the headrest rod, the first magnetic ring 204 and the second magnetic ring 805 are magnetically attracted to each other again, and the stop point 901 is re-engaged in the corresponding limiting groove 8011.

[0039] Preferably, the plug 8 includes a plug body 801 and a plug terminal 806. The plug body 801 is sleeved on the plug terminal 806. The second magnetic ring 805 is sleeved between the plug body 801 and the plug terminal 806. The second circuit contact 802 is set on the top surface of the plug terminal 806. Two limiting grooves 8011 are respectively arranged at both ends of the plug body 801. The design is ingenious and easy to install.

[0040] Ideally, the plug fixing base 6 includes a fixing base body 601, and the upper end of the spring piece 9 is fixed to the fixing base body 601 by an inverted snap structure. The structure is simple and easy to install.

[0041] Ideally, the top surfaces at both ends of the mounting base 601 are provided with locking holes, the upper end of the spring piece 9 is bent inward into an inverted U-shape, and the bent section is provided with a buckle. The buckle and the locking hole cooperate to form a buckle structure, thereby realizing the installation and fixation of the spring piece 9. The use of a buckle structure for installation and fixation makes it convenient to replace the spring piece after the elasticity fails.

[0042] Ideally, it also includes a fixing seat connector 5, which is welded to the fixing guide sleeve 3, and the fixing seat body 601 is fixed to the fixing seat connector 5. The structure is simple and easy to install.

[0043] Preferably, the headrest rod connecting terminal 2 includes a headrest wiring harness 201 and a terminal assembly 202 that are interconnected. The terminal assembly 202 includes a terminal sleeve 203 and a wiring harness terminal head 205. The terminal sleeve 203 is sleeved on the wiring harness terminal head 205. A first magnetic ring 204 is sleeved between the terminal sleeve 203 and the wiring harness terminal head 205, and the bottom surfaces of the three are flush. The first circuit contact 207 is set on the bottom surface of the wiring harness terminal head 205. The design is ingenious and easy to install.

[0044] Preferably, it also includes a spring-loaded snap fastener 7, which includes a snap-on body 701 and a plug body 801 with a transverse mounting hole. The snap-on body 701 is movably limited in the transverse mounting hole. The snap-on body 701 has a ring-shaped structure with a protrusion 703 on its inner wall and a third magnet 702 on its exposed outer wall. The end sleeve 203 has a groove 208 on its side end that matches the protrusion 703. A compression spring 10 is provided between the snap-on body 701 and the plug body 801. The compression spring 10 has an elastic force to push the protrusion 703 into the groove 208.

[0045] The side wall of the fixing base body 601 is provided with a fourth magnetic block 602 corresponding to the third magnetic block 702 for magnetic attraction with it, so that the plug 8 can be magnetically attracted to the fourth magnetic block 602 through the third magnetic block 702. When the third magnetic block 702 and the fourth magnetic block 602 are magnetically attracted, the magnetic force between them can overcome the elastic force of the compression spring 10, and the protrusion 703 can be dislodged from the groove 208. When the third magnetic block 702 and the fourth magnetic block 602 are separated, the protrusion 703 can be inserted into the groove 208 under the action of the compression spring 10, so as to stably and firmly realize the connection between the headrest rod 1 and the plug 8, and will not be loosened due to external force and vibration.

[0046] A fifth magnetic block 603 is provided on the bottom surface of the transverse section of the fixing body 601. A sixth magnetic block 803 is provided on the top surface of the plug body 801 corresponding to the fifth magnetic block 603 for magnetic attraction with it. When the third magnetic block 702 and the fourth magnetic block 602 are magnetically attracted to each other, the fifth magnetic block 603 is also magnetically attracted to the sixth magnetic block 803, thereby fixing the plug 8 to the plug fixing base 6.

[0047] The bottom surface of the wire harness terminal head 205 is also provided with a first positioning hole 206, the top surface of the plug terminal 806 is provided with a first positioning post 807 corresponding to the first positioning hole 206, the top surface of the plug body 801 is provided with a second positioning hole 804, and the bottom surface of the transverse section of the fixing base body 601 is provided with a second positioning post 604 corresponding to the second positioning hole 804.

[0048] The first circuit contact 207 has a conical bottom recess structure, and the second circuit contact 802 has an elastically expandable columnar structure that matches the conical bottom recess structure.

Claims

1. An improved structure of a circuit connection for a headrest of a seat, comprising a plug (8) and a plug fixing seat (6), characterized in that: The left and right ends of the plug fixing seat (6) are respectively fixed with elastic sheets (9), the elastic sheets (9) extend downward to the two sides of the plug (8), and the bottom ends of the elastic sheets (9) are V-shaped and concave to form stop points (901), the two ends of the plug (8) are provided with limiting grooves (8011) matched with the stop points (901), the two stop points (901) are located in the two limiting grooves (8011) one above the other, when the plug (8) is driven to move downward, the plug (8) can extrude the elastic sheets (9) outward to make the elastic sheets (9) elastically deform, so that the stop points (901) can slide out of the corresponding limiting grooves (8011), thereby realizing the separation of the plug (8) and the plug fixing seat (6).

2. The improved headrest circuit connection for a seat of claim 1, wherein: It also comprises a headrest rod (1), a fixed guide sleeve (3) fixed to the backrest framework and a headrest guide sleeve (4) installed in the fixed guide sleeve (3), a headrest rod connecting terminal (2) is installed at the opening of the bottom end of the headrest rod (1), a first magnetic ring (204) and a first circuit contact (207) are arranged on the headrest rod connecting terminal (2), the plug fixing seat (6) is fixed below the fixed guide sleeve (3), the plug (8) is magnetically attracted and fixed below the plug fixing seat (6) and located on the travel route of the headrest rod (1), a second magnetic ring (805) and a second circuit contact (802) are arranged on the plug (8), when the headrest rod (1) is inserted into the headrest guide sleeve (4) and is in the use position, the first magnetic ring (204) and the second magnetic ring (805) are magnetically attracted and connected, the first circuit contact (207) and the second circuit contact (802) are in contact, so that the headrest rod connecting terminal (2) and the plug (8) are in a circuit communication state, when the headrest rod (1) is adjusted in height within the use position range, the plug (8) is separated from the plug fixing seat (6), and the headrest rod (1) can drive the plug (8) to move up and down.

3. The improved electrical connection of a headrest of a seat according to claim 2, wherein: The plug (8) comprises a plug body (801) and a plug terminal (806), the plug body (801) is sleeved on the plug terminal (806), the second magnetic ring (805) is sleeved between the plug body (801) and the plug terminal (806), and the second circuit contact (802) is arranged on the top surface of the plug terminal (806), and the two limiting grooves (8011) are arranged at the two ends of the plug body (801).

4. The improved electrical connection of a headrest of a seat according to claim 3, wherein: The plug fixing seat (6) comprises a fixing seat body (601), and the upper end of the elastic sheet (9) is clamped and fixed to the fixing seat body (601) through a reverse buckle structure.

5. The improved electrical connection of a headrest of a seat according to claim 4, wherein: The top surfaces of the two ends of the fixing seat body (601) are each provided with a clamping hole, the upper end of the elastic sheet (9) is bent inward to form an inverted U shape, and a reverse buckle is arranged on the bent section, the reverse buckle cooperates with the clamping hole to form a reverse buckle structure, thereby realizing the installation and fixation of the elastic sheet (9).

6. The improved electrical connection of a headrest of a seat according to claim 4, wherein: It also comprises a fixing seat connecting piece (5), the fixing seat connecting piece (5) is welded to the fixed guide sleeve (3), and the fixing seat body (601) is fixed to the fixing seat connecting piece (5).

7. The improved electrical connection of a headrest of a seat according to claim 4, wherein: The headrest rod connecting terminal (2) comprises a headrest wire harness (201) and a terminal assembly (202) connected with each other, the terminal assembly (202) comprises a terminal sheath (203) and a wire harness terminal head (205), the terminal sheath (203) is sleeved on the wire harness terminal head (205), the first magnetic ring (204) is sleeved between the terminal sheath (203) and the wire harness terminal head (205), and the bottom surfaces of the three are flush, and the first circuit contact (207) is arranged on the bottom surface of the wire harness terminal head (205).

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