An adjustable rotary locking mechanism

Abstract

The present invention discloses an adjustable rotary locking mechanism, comprising an unlocking assembly and a shifting and positioning assembly that cooperate with each other, wherein the unlocking assembly is located on one side of a first connecting member, and the shifting and positioning assembly is located on one side of a second connecting member, and the unlocking assembly and the shifting and positioning assembly are assembled together via a connecting support plate, and the connecting support plate is mounted on the second connecting member. The present invention has firm positioning, a compact and reasonable structure, and convenient and quick operation. It is suitable for connecting members with small thickness and a matching structure that requires unidirectional spacing adjustment, and realizes the independent setting of the unlocking button. When applied to a car seat, the thickness of the headrest can be controlled within 40 mm, and the headrest can be adjusted forward and backward, which conforms to the development concept of integrating the second connecting member and the headrest and making them lightweight. The invention has broad market application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile seat connection components, and in particular to an adjustable rotation locking mechanism. Background Art

[0002] At present, traditional car seat headrests on the market are mostly independent of the top of the seat. They are inserted into the headrest guide sleeve in the second connecting member through two pull-out connecting rods that can move up and down and are locked. The specific unlocking and locking structures are set on the backrest, or the unlocking and locking structures are both set on the headrest. In order to accommodate the moving mechanism inside the headrest, most of the first connecting members are more than 100 mm thick, which is thick and heavy. There are very few ultra-thin headrests with a thickness of less than 40 mm.

[0003] With the continuous development of the new energy vehicle industry, energy conservation and weight reduction have become the development direction of the entire interior decoration industry and even the entire vehicle. How to develop an adjustable rotary locking mechanism that can achieve fore-and-aft adjustment and gradually achieve the transition to lighter and thinner seats has become a technical challenge that technicians in this field urgently need to solve. Summary of the Invention

[0004] The purpose of the present invention is to provide an adjustable rotary locking mechanism, which realizes the integrated and lightweight design of the second connecting member and the headrest, and realizes the front and rear adjustment function of the ultra-thin headrest, so that it can better adapt to market development.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides an adjustable rotary locking mechanism, comprising an unlocking component and a gear shifting and positioning component that cooperate with each other, wherein the unlocking component is located on one side of a first connecting member, and the gear shifting and positioning component is located on one side of a second connecting member, and the unlocking component and the gear shifting and positioning component are assembled together through a connecting support plate, and the connecting support plate is installed on the second connecting member.

[0007] Preferably, the unlocking assembly includes an unlocking synchronization rod, an unlocking push rod and a return spring, one end of the unlocking synchronization rod passes through and is connected in the second sliding guide sleeve and can rotate around the axis of the second sliding guide sleeve, and the second sliding guide sleeve is connected to the upper part of the connecting support plate; the unlocking synchronization rod is horizontally placed and mounted on the first connecting member, the rotating tooth head at the other end of the unlocking synchronization rod cooperates with the translation rack at the top inner side of the unlocking push rod, and the outer side of the unlocking push rod is connected with an unlocking button; the center hole of the return spring is sleeved on the first connecting member, one working end of the return spring abuts against the air avoidance platform of the first connecting member, and the other working end of the return spring abuts against the spring limiter; a square through groove for air avoidance is provided on the outer side of the unlocking push rod;

[0008] The gear shifting and positioning assembly includes a locking pin and a locking shift block. The locking pin is installed in the mounting groove of the unlocking synchronization rod located at the side end of the second connecting member through a connecting screw. The locking shift block is connected to the skeleton of the second connecting member. A plurality of equally spaced shift grooves are provided on the locking shift block. When the unlocking synchronization rod moves horizontally along the second sliding guide sleeve, it drives the locking pin to be embedded in the shift groove for locking and positioning.

[0009] Preferably, the unlocking synchronization rod includes a shaft core and a shaft sleeve, the shaft core and the rotating tooth head are integrally formed, the shaft sleeve is sleeved on the shaft core, one end of the shaft sleeve is riveted to the first connecting member, and the outer periphery of the shaft sleeve matches the inner hole of the second sliding guide sleeve.

[0010] Preferably, it also includes two groups of guide assemblies, the guide assemblies including a first sliding guide sleeve and a sliding guide rod, the first sliding guide sleeve is positioned and connected to the connecting support plate, one end of the sliding guide rod is connected to the first connecting member, and the other end of the sliding guide rod is connected to the inner hole of the first sliding guide sleeve, and the sliding guide rod moves horizontally along the axis direction of the first sliding guide sleeve.

[0011] Preferably, two sets of the first sliding guide sleeves and sliding guide rods that match each other are located on both sides of the bottom of the connecting support plate.

[0012] Preferably, the second sliding guide sleeve is welded to the upper portion of the connection support plate and close to the center position, and one second sliding guide sleeve and two first sliding guide sleeves are arranged in a triangle.

[0013] Preferably, the guide components are provided as one or more groups, the unlocking components are provided as at least one group, and the installation positions of the guide components and the unlocking components are adjusted according to the structures of the first connecting member and the second connecting member.

[0014] Preferably, the unlocking button includes a button shell, a button body and a return spring. The button shell is snap-fitted and fixed in the reserved mounting groove of the first connecting member. The button body is movably installed in the central groove of the button shell. The central column of the button body passes through the central hole of the button shell and contacts the outer end face of the unlocking push rod. The return spring is sleeved on the central column of the button body. The two ends of the return spring abut against the bottom surface of the central groove of the button shell and the inner side surface of the pressing end face of the button body.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention provides an adjustable rotary locking mechanism comprising a first connecting member and a second connecting member. The first connecting member is moved away from or closer to the second connecting member via an adjustable structure of a connecting accessory. This invention achieves the installation and connection of the ultra-thin connecting member while also enabling the front-to-back position adjustment of the two connecting members. The improved structure enables the independent provision of an unlocking button. The fixed end of the unlocking button is hinged to the first connecting member, and the working end of the unlocking button abuts the outer end surface of the unlocking push rod. When adjusting the spacing, manually pressing the unlocking button to unlock the first connecting member allows the first connecting member to be pulled horizontally.

[0017] The present invention has firm positioning, compact and reasonable structure, convenient and quick operation, is suitable for connecting parts with small thickness and matching structures that require unidirectional spacing adjustment, and realizes the independent setting of the unlocking button; when applied to car seats, the thickness of the headrest can be controlled within 40mm, and the front and rear adjustment of the headrest is realized, which is in line with the development concept of the second connecting part, the integration of the headrest and the lightness and thinness. The invention has broad market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 A perspective view of the connection position of the adjustable rotary locking mechanism of the present invention;

[0020] Figure 2 This is the main view of the unlocking component of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of the unlocking component of the present invention;

[0022] Figure 4 This is a three-dimensional schematic diagram of the gear shifting and positioning assembly of the present invention;

[0023] Figure 5 This is a schematic diagram of the assembly of the unlocking synchronization rod of the present invention;

[0024] Figure 6 This is a schematic diagram of the explosion of the unlocking synchronization rod of the present invention;

[0025] Figure 7 The unlock button of the present invention explodes Figure 1 ;

[0026] Figure 8 The unlock button of the present invention explodes Figure 2 ;

[0027] Figure 9 This is a schematic diagram of the present invention being applied to a car seat in use;

[0028] Explanation of reference numerals: 1. unlocking assembly; 2. gear shifting and positioning assembly; 3. connecting support plate; 4. first sliding guide sleeve; 5. sliding guide rod; 6. second sliding guide sleeve; 7. first connecting member; 8. second connecting member;

[0029] 1-1, unlocking synchronization rod; 1-2, unlocking push rod; 1-3, return spring; 1-4, unlocking button;

[0030] 1-11, rotating gear head; 1-12, shaft core; 1-13, shaft sleeve;

[0031] 1-41, button housing; 1-42, button body; 1-43, return spring;

[0032] 1-21, translation rack; 1-22, spring limiter; 1-23, square through slot;

[0033] 2-1. Locking pin; 2-2. Connecting screw; 2-3. Locking gear block. DETAILED DESCRIPTION

[0034] like Figure 1-8 As shown, an adjustable rotary locking mechanism includes an unlocking component 1 and a gear shifting and positioning component 2 that cooperate with each other, the unlocking component 1 is located on one side of the first connecting member 7, and the gear shifting and positioning component 2 is located on one side of the second connecting member 8, the unlocking component 1 and the gear shifting and positioning component 2 are assembled together through a connecting support plate 3, the connecting support plate 3 is installed on the second connecting member 8, and the connecting support plate 3 is located on the side where the second connecting member 8 and the first connecting member 7 are in contact.

[0035] Specifically, such as Figure 2 、 3As shown, the unlocking assembly 1 includes an unlocking synchronization rod 1-1, an unlocking push rod 1-2 and a return spring 1-3. One end of the unlocking synchronization rod 1-1 is connected to the second sliding guide sleeve 6 and can rotate around the axis of the second sliding guide sleeve 6. The second sliding guide sleeve 6 is connected to the upper part of the connecting support plate 3; the unlocking synchronization rod 1-1 is horizontally placed and installed on the first connecting member 7, and the rotating tooth head 1-11 at the other end of the unlocking synchronization rod 1-1 cooperates with the translation rack 1-21 at the top inner side of the unlocking push rod 1-2. Specifically, the rotating tooth head 1-1 The teeth of the unlocking push rod 1-2 mesh with the teeth of the translation rack 1-21. An unlocking button 1-4 is connected to the outside of the unlocking push rod 1-2. The center hole of the return spring 1-3 is mounted on the first connecting member 7. One working end of the return spring 1-3 abuts the clearance platform of the first connecting member 7, and the other working end of the return spring 1-3 abuts the spring stop 1-22. A square through-slot 1-23 is provided on the outside of the unlocking push rod 1-2 for clearance. This square through-slot is provided primarily to provide clearance for the installation of other components in the corresponding position. The return spring 1-3 is a torsion spring, which is easy and quick to install.

[0036] Specifically, such as Figure 7-8 As shown, the unlocking button 1-4 includes a button housing 1-41, a button body 1-42, and a return spring 1-43. The button housing 1-41 is fixedly secured within the reserved mounting groove of the first connecting member 7, and the button body 1-42 is movably mounted within the central recess of the button housing 1-41. The central column of the button body 1-42 passes through the central hole of the button housing 1-41 and contacts the outer end face of the unlocking push rod 1-2. The return spring 1-43 is sleeved onto the central column of the button body 1-42, with both ends of the return spring 1-43 abutting against the bottom face of the central recess of the button housing 1-41 and the inner side face of the pressing end face of the button body 1-42. When adjusting the spacing, manually pressing the button body 1-42 drives the unlocking push rod 1-2 to move inward, thereby rotating the tooth head 1-11 to drive the unlocking synchronization rod 1-1 and the locking pin 2-1 to rotate, thereby achieving unlocking and pulling the first connecting member 7 to move horizontally. The independent setting of the unlocking button is achieved through the improvement of the structure. Compared with the prior art, the unlocking button is separated from the second connecting piece, the operation is more convenient and quick, the space occupied is small, and the structure is more compact.

[0037] like Figure 4-6As shown, the shift positioning assembly 2 includes a locking pin 2-1 and a locking shift block 2-3. The locking pin 2-1 is mounted in a mounting slot of the unlocking synchronization rod 1-1 at the side end of the second connecting member 8 via a connecting screw 2-2. The locking shift block 2-3 is welded or bolted to the frame of the second connecting member 8. The locking shift block 2-3 is provided with a plurality of equally spaced shift slots. When the unlocking synchronization rod 1-1 moves horizontally along the second sliding guide sleeve 6, it drives the locking pin 2-1 into the shift slots for locking and positioning. Specifically, the locking shift block 2-3 cooperates with the locking pin 2-1 to form a shift limit when the headrest moves forward and backward by different distances.

[0038] like Figure 5 、 6 As shown, the unlocking synchronization rod 1-1 includes a shaft core 1-12 and a shaft sleeve 1-13. The shaft core 1-12 is integrally formed with the rotating tooth head 1-11. The shaft sleeve 1-13 is sleeved on the shaft core 1-12. One end of the shaft sleeve 1-13 is riveted to the first connecting member 7. The outer periphery of the shaft sleeve 1-13 matches the inner hole of the second sliding guide sleeve 6. During the adjustment operation, the shaft sleeve 1-13 moves with the first connecting member 7 and the second sliding guide sleeve 6 plays a positioning and guiding role for the shaft sleeve 1-13 during the movement.

[0039] like Figure 1 、 3 4, it also includes two groups of guide components, the guide components include a first sliding guide sleeve 4 and a sliding guide rod 5, the first sliding guide sleeve 4 is positioned and connected to the connecting support plate 3, one end of the sliding guide rod 5 is connected to the first connecting member 7, specifically, the sliding guide rod 5 is made of metal, one end of the sliding guide rod 5 is connected to the first connecting member 7 by riveting or screwing, the other end of the sliding guide rod 5 is connected to the inner hole of the first sliding guide sleeve 4, and moves horizontally along the axis direction of the first sliding guide sleeve 4 when moving. Specifically, two groups of mutually matching first sliding guide sleeves 4 and sliding guide rods 5 are located on both sides of the bottom of the connecting support plate 3. The setting of the guide component improves the stable balance of the positioning, and at the same time plays a guiding role when the sliding adjusts the front and rear positions, avoiding the problem of tilting and jamming, thereby effectively improving the smoothness of the adjustment of the component.

[0040] Specifically, the second sliding guide sleeve 6 is welded to the upper portion of the connecting support plate 3 near the center, and one second sliding guide sleeve 6 and two first sliding guide sleeves 4 are arranged in a triangular arrangement. This triangular arrangement effectively maintains the stability of the structure and ensures smoothness during the forward and backward adjustment process.

[0041] In addition, in other embodiments, the guide assemblies are arranged in one or more groups, such as three or four groups, and the unlocking assemblies 1 are arranged in at least one group, or even two groups. The installation positions of the guide assemblies and the unlocking assemblies 1 are adjusted according to the structure of the first connecting member 7 and the second connecting member 8. For example, when the guide assemblies are arranged in three groups and the unlocking assemblies 1 are arranged in one group, the unlocking assemblies 1 are located in the middle, and the guide assemblies surround the outer periphery of the unlocking assemblies 1; when the guide assemblies are arranged in two groups and the unlocking assemblies 1 are arranged in one group, the three assemblies can be located in the same straight line; when the guide assemblies are arranged in two groups and the unlocking assemblies 1 are also arranged in two groups, the four assemblies can be arranged in a quadrilateral.

[0042] The regulation process of the present invention is as follows:

[0043] First, when the first connecting member 7 and the second connecting member 8 are attached, Figure 1 As shown, at this time, the locking pin 2-1 is installed in the installation groove of the end of the unlocking synchronization rod 1-1 and is located outside the locking shift block 2-3;

[0044] Secondly, when the first connecting member 7 moves forward and needs to be away from the second connecting member 8, as shown in FIG. Figure 2 As shown, first press the button body 1-42 of the unlocking button 1-4, and the unlocking push rod 1-2 is pushed inward. At this time, the return spring 1-3 is in a compressed state; because the teeth of the rotating tooth head 1-11 are engaged with the teeth on the translation rack 1-21, the shaft core 1-12 and the rotating tooth head 1-11 are formed as one piece, and the rotating tooth head 1-11 drives the shaft core 1-12 to rotate clockwise, thereby driving the locking pin 2-1 at the other end to rotate clockwise, and the locking pin rotates 90° to unlock the door; then The operator manually pulls the first connecting member 7 forward to the appropriate position. When the first connecting member 7 stops moving, the button body 1-42 is released. Under the action of the return spring 1-43, the button body 1-42 resets, and the button body's thrust on the unlocking push rod 1-2 is released. The translating rack 1-21 drives the rotating tooth head 1-11 to rotate in the opposite direction, thereby driving the unlocking synchronization rod 1-1 and the locking pin 2-1 to rotate in the opposite direction and slide into the nearest gear slot on the locking gear block 2-3, thereby realizing the locking positioning function. When the locking pin 2-1 is embedded in any gear slot, the position of the locking pin 2-1 along the circumferential rotation direction is the same as the initial state, and the unlocking push rod 1-2 will move outward in the opposite direction to the initial position and maintain the locked positioning state.

[0045] Finally, repeating the above operation process can realize horizontal movement of the first connecting member 7, thereby achieving adjustment away from or close to the second connecting member 8. The realization of this adjustment function can meet the adjustment of different positional relationships of the two connecting members to meet the different usage scenarios of each product.

[0046] like Figure 9 As shown, the present invention can be applied to the installation and connection of ultra-thin headrests of automobile seats. The unlocking component 1 is installed on one side of the headrest, and the gear adjustment and positioning component 2 is installed on one side of the seat back. After the connection, the thickness H of the headrest can be controlled within 40 mm, effectively realizing the connection of the ultra-thin headrest, reducing the overall weight of the seat, and making it more in line with the development trend of energy conservation and weight reduction; in addition, the component can also be extended to all unidirectional motion structures, including but not limited to small table boards, display screens, side armrests and other related occasions.

[0047] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An adjustable rotary locking mechanism, characterized in that: The invention comprises an unlocking assembly (1) and a shifting and positioning assembly (2) that cooperate with each other, wherein the unlocking assembly (1) is located on one side of a first connecting member (7), and the shifting and positioning assembly (2) is located on one side of a second connecting member (8), and the unlocking assembly (1) and the shifting and positioning assembly (2) are assembled together via a connecting support plate (3), and the connecting support plate (3) is mounted on the second connecting member (8); The unlocking assembly (1) comprises an unlocking synchronization rod (1-1), an unlocking push rod (1-2) and a reset spring (1-3); one end of the unlocking synchronization rod (1-1) is connected to the second sliding guide sleeve (6) and can rotate around the axis of the second sliding guide sleeve (6); the second sliding guide sleeve (6) is connected to the upper part of the connecting support plate (3); the unlocking synchronization rod (1-1) is horizontally mounted on the first connecting member (7); the rotating tooth head (1-11) at the other end of the unlocking synchronization rod (1-1) is connected to the unlocking push rod (1-2) and the reset spring (1-3); The translation rack (1-21) on the top of the inner side of the rod (1-2) cooperates with the unlocking push rod (1-2), and the outer side of the unlocking push rod (1-2) is connected with an unlocking button (1-4); the center hole of the return spring (1-3) is sleeved on the first connecting member (7), one working end of the return spring (1-3) abuts on the air avoidance platform of the first connecting member (7), and the other working end of the return spring (1-3) abuts on the spring limiter (1-22); the outer side of the unlocking push rod (1-2) is provided with a square through groove (1-23) for air avoidance; The shift positioning assembly (2) comprises a locking pin (2-1) and a locking shift block (2-3); the locking pin (2-1) is mounted in a mounting groove of the unlocking synchronization rod (1-1) located at the side end of the second connecting member (8) via a connecting screw (2-2); the locking shift block (2-3) is connected to the skeleton of the second connecting member (8); a plurality of shift slots distributed at equal intervals are provided on the locking shift block (2-3); when the unlocking synchronization rod (1-1) moves horizontally along the second sliding guide sleeve (6), the locking pin (2-1) is driven to be embedded in the shift slot for locking and positioning; The unlocking synchronization rod (1-1) comprises a shaft core (1-12) and a shaft sleeve (1-13), wherein the shaft core (1-12) and the rotating tooth head (1-11) are integrally formed, and the shaft sleeve (1-13) is sleeved on the shaft core (1-12), one end of the shaft sleeve (1-13) is riveted to the first connecting member (7), and the outer periphery of the shaft sleeve (1-13) matches the inner hole of the second sliding guide sleeve (6); The unlocking button (1-4) comprises a button housing (1-41), a button body (1-42) and a return spring (1-43); the button housing (1-41) is fixed in a reserved mounting groove of the first connecting member (7); the button body (1-42) is movably mounted in a central groove of the button housing (1-41); the central column of the button body (1-42) passes through the central hole of the button housing (1-41) and contacts the outer end face of the unlocking push rod (1-2); the return spring (1-43) is sleeved on the central column of the button body (1-42); the two ends of the return spring (1-43) abut against the bottom face of the central groove of the button housing (1-41) and the inner side face of the pressing end face of the button body (1-42).

2. The adjustable rotation locking mechanism according to claim 1, characterized in that: The invention also includes two sets of guide assemblies, wherein the guide assemblies include a first sliding guide sleeve (4) and a sliding guide rod (5), wherein the first sliding guide sleeve (4) is positioned and connected to the connecting support plate (3), one end of the sliding guide rod (5) is connected to the first connecting member (7), and the other end of the sliding guide rod (5) is connected to the inner hole of the first sliding guide sleeve (4), and when the sliding guide rod (5) moves, it moves horizontally along the axis direction of the first sliding guide sleeve (4).

3. The adjustable rotation locking mechanism according to claim 2, characterized in that: Two sets of the first sliding guide sleeves (4) and sliding guide rods (5) that match each other are located on both sides of the bottom of the connecting support plate (3).

4. The adjustable rotation locking mechanism according to claim 3, characterized in that: The second sliding guide sleeve (6) is welded to the upper part of the connection support plate (3) and close to the center position, and one second sliding guide sleeve (6) and two first sliding guide sleeves (4) are arranged in a triangle.

5. The adjustable rotation locking mechanism according to claim 2, characterized in that: The unlocking assembly (1) is provided as at least one group, and the installation positions of the guide assembly and the unlocking assembly (1) are adjusted according to the structures of the first connecting member (7) and the second connecting member (8).

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