Common base suitable for different headrest mechanisms and headrest mechanism

Abstract

The utility model relates to a common base suitable for different headrest mechanisms and a headrest mechanism, the common base can be used for different headrest mechanisms, the common base comprises a first through hole extending along the front-back direction of the base, and the first through hole is used for a guide pillar to penetrate through the base, so that the guide pillar moves relative to the base to realize the adjustment of the headrest mechanism along the front-back direction; the second through hole extends in the longitudinal direction of the base and is used for containing a lining and allowing an insertion rod arranged in the lining in a sliding mode to penetrate through, so that the base moves along the insertion rod to achieve longitudinal adjustment of the headrest mechanism; the guide groove extends in the left-right direction of the base and is used for guiding the push rod to move in the left-right direction so that locking and unlocking between the lining and the insertion rod can be achieved, and the repeated work of adjusting the base to be matched with the size in the process of developing different headrests is reduced by providing the common base capable of meeting the requirements of the different headrests.

Description

Technical Field

[0001] The utility model relates to the technical field of headrest adjustment, in particular to a common base and a headrest mechanism suitable for different headrest mechanisms. Background Art

[0002] As people's demand for car driving comfort and safety continues to increase, the functions of car headrests are also constantly upgraded. The traditional car headrest mechanism is to set different bases in the headrest to assemble with the corresponding adjustment structure to achieve two-way or four-way adjustment of the car headrest. This requires the design of a base for each different adjustment headrest. The repeated development of the base takes up man-hours, reduces efficiency, and increases development costs. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a common base and a headrest mechanism suitable for different headrest mechanisms, thereby avoiding the situation of repeated development of the base by providing a common base that can meet the needs of different headrests.

[0004] The technical solution to achieve the above object is a common base that can be used for different headrest mechanisms, and the common base includes:

[0005] A first through hole extending in the front-to-back direction of the common base, wherein the first through hole is used for a guide post to pass through the common base so that the guide post moves relative to the common base to achieve adjustment of the headrest mechanism in the front-to-back direction;

[0006] a second through hole extending longitudinally along the common base, the second through hole being used to accommodate a bushing and allow an insertion rod slidably disposed in the bushing to pass through the common base, so that the common base moves along the insertion rod to achieve longitudinal adjustment of the headrest mechanism;

[0007] A guide groove extends along the left-right direction of the common base, and the guide groove is used to guide the push rod to move along the left-right direction to achieve locking and unlocking between the bushing and the insertion rod.

[0008] A two-way adjustable headrest mechanism, comprising:

[0009] The common base as mentioned above;

[0010] A bushing fixedly mounted in the second through hole of the common base, wherein the second through hole is located on the left and right sides of the common base;

[0011] an insertion rod slidably disposed in the bushing;

[0012] a push rod, the push rod being placed in the guide groove of the common base;

[0013] A button assembly is provided with a button body, wherein the button body pushes the push rod to move along the guide groove, thereby realizing unlocking between the bushing and the insertion rod, and the common base can be adjusted longitudinally along the insertion rod.

[0014] Furthermore, it also includes a steel wire fixed on the bushing and a plurality of slots arranged on the insertion rod;

[0015] When the steel wire is inserted into the slot, the bushing and the insertion rod are locked;

[0016] When the button body pushes the push rod to move along the guide groove, the push rod pushes the steel wire out of the slot, and the bushing and the insertion rod are unlocked, so that the common base can be adjusted longitudinally along the insertion rod.

[0017] Furthermore, the push rod is connected to the common base via a first spring, and the first spring provides a restoring force for the push rod.

[0018] Furthermore, the bushing is provided with a long slot extending in the longitudinal direction, and a pin passes through the long slot and is inserted into the insertion rod, and the pin moves in the long slot to limit the longitudinal adjustment position of the common base.

[0019] Furthermore, it also includes a shell, which is fixedly connected to the common base so that the shell can be adjusted longitudinally along the insertion rod.

[0020] Furthermore, the button assembly also includes a second spring sleeved on the button body to provide a restoring force for resetting the button body.

[0021] Furthermore, it also includes a soft covering layer, which includes foam and a face cover covering the foam, and the common base is accommodated in the foam so that the soft covering layer can be adjusted longitudinally along the insertion rod.

[0022] Furthermore, the common base also includes a button connecting section, and the button assembly also includes a button connecting block, the button connecting block is connected to the button connecting section, and the button body is mounted on the button connecting block and can move relative to the button connecting block.

[0023] A four-way adjustable headrest mechanism, comprising:

[0024] The common base as mentioned above;

[0025] A bushing fixedly mounted in the second through hole of the common base, wherein the second through hole is located on the left and right sides of the common base;

[0026] an insertion rod slidably disposed in the bushing;

[0027] a guide post passing through the first through hole of the common base;

[0028] a shell, the shell being fixedly connected to the guide post so that the shell can move relative to the common base to achieve adjustment of the headrest mechanism in the front-rear direction;

[0029] A push rod, the push rod is placed in the guide groove of the common base, the push rod is connected to the common base via a first spring, and the first spring provides a restoring force for the push rod;

[0030] A button assembly comprises a button body and a second spring sleeved on the button body, wherein the second spring provides a restoring force for resetting the button body.

[0031] The button body passes through the housing to push the push rod to move along the guide groove, thereby achieving unlocking between the bushing and the insertion rod, so that the housing and the common base can be adjusted longitudinally along the insertion rod.

[0032] Furthermore, it also includes a steel wire fixed on the bushing and a plurality of slots arranged on the insertion rod;

[0033] When the steel wire is inserted into the slot, the bushing and the insertion rod are locked;

[0034] When the steel wire is released from the slot, the bushing and the insertion rod are unlocked.

[0035] Furthermore, when the button body pushes the push rod to move along the guide groove, the push rod pushes the steel wire out of the slot to unlock the bushing and the insertion rod, so that the shell and the common base can be adjusted longitudinally along the insertion rod.

[0036] Furthermore, it also includes a sliding block and a locking tongue, wherein the sliding block passes through the common base in the front-to-back direction and is fixedly connected to the housing, a plurality of locking grooves are arranged on the sliding block, and the locking tongue is arranged inside the common base;

[0037] When the locking tongue is inserted into the locking groove, the sliding block and the common base are locked;

[0038] When the locking tongue escapes from the locking groove, the sliding block and the locking tongue are unlocked.

[0039] Furthermore, the button body pushes the push rod to move along the guide groove, and the push rod pushes the lock tongue to disengage from the lock groove to achieve unlocking between the sliding block and the lock tongue, so that the shell can move in the front-rear direction relative to the common base.

[0040] Furthermore, the common base is provided with a receiving groove for receiving the motor assembly, and the shell is driven by the motor assembly to move in the front-rear direction relative to the common base.

[0041] Compared with the prior art, the utility model has the following beneficial effects:

[0042] 1. Provide a common base to meet the needs of headrests with different adjustment methods, reducing the repetitive work of adjusting the base adaptation size during the development of different headrests.

[0043] 2. By cooperating the button connecting section on the common base with the button connecting block of the button assembly, the button body can be adapted to the common base for different headrests (such as hard or soft pillows) to unlock the headrest, thereby reducing the repeated development work of the button assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a front view of a common base of the utility model.

[0045] Figure 2 It is a rear view of a common base of the utility model.

[0046] Figure 3 This is a front-to-back cross-sectional view of a common base of the utility model.

[0047] Figure 4 This is a left-right sectional view of a common base of the utility model.

[0048] Figure 5 This is a schematic diagram of the assembly of the headrest mechanism of Example 1 of the utility model.

[0049] Figure 6 This is an exploded view of the headrest mechanism of Example 1 of the present utility model.

[0050] Figure 7 This is a schematic diagram of the disassembly of the push rod and the common base of Example 1 of the utility model.

[0051] Figure 8 This is a schematic diagram of the assembly of the push rod and the common base of Example 1 of the utility model.

[0052] Fig. 9 This is a schematic diagram of the disassembly of the button assembly and the rear shell of Example 1 of the utility model.

[0053] Fig.10 This is a schematic diagram of the assembly of the button assembly and the rear housing of Example 1 of the utility model.

[0054] Fig.11 This is a schematic diagram of the assembly of the steel wire and the bushing in Example 1 of the utility model.

[0055] Fig.12 This is a diagram showing the matching relationship between the pin and the insertion rod of Example 1 of the utility model.

[0056] Fig.13 This is a schematic diagram of the structure of the steel wire in Example 1 of the utility model.

[0057] Fig.14 This is a schematic diagram of the structure of the bushing in Example 1 of the utility model.

[0058] Fig.15 This is a disassembled diagram of the lock tongue, push rod, button assembly and steel wire of Example 3 of the utility model;

[0059] Fig.16 This is a schematic diagram of the assembly of the lock tongue, push rod, button assembly and steel wire of Example 3 of the utility model;

[0060] Fig.17 It is a schematic diagram of the states of the button assembly, the push rod and the steel wire when the insertion rod and the bushing of Example 1 of the utility model are in a locked state.

[0061] Fig.18 for Fig.17 An enlarged schematic diagram of the matching relationship between the middle steel wire and the push rod.

[0062] Fig.19 for Fig.17 An enlarged view of the matching relationship between the middle steel wire, push rod and insertion rod.

[0063] Fig. 20 This is a schematic diagram of the states of the button assembly, the push rod, and the steel wire when the insertion rod and the bushing are in the unlocked state according to Example 1 of the utility model.

[0064] Fig.21 for Fig. 20 An enlarged schematic diagram of the matching relationship between the middle steel wire and the push rod.

[0065] Fig. 22 for Fig. 20 An enlarged view of the matching relationship between the middle steel wire, push rod and insertion rod.

[0066] Fig.23 This is a cross-sectional view of the bushing of Example 1 of the utility model.

[0067] Fig.24 This is an assembly cross-sectional view of the bushing and the insertion rod of Example 1 of the utility model.

[0068] Fig.25 This is an exploded view of the headrest mechanism of Example 2 of the present utility model.

[0069] Fig.26 This is a disassembled diagram of the button assembly and the common base of Example 2 of the utility model.

[0070] Fig. 27 This is an assembly cross-sectional view of the button assembly and the common base of Example 2 of the utility model.

[0071] Fig.28 This is a schematic diagram of the assembly of the headrest mechanism of Example 3 of the present utility model.

[0072] Fig.29 This is an exploded view of the headrest mechanism of Example 3 of the present utility model.

[0073] Fig.30 This is a disassembled diagram of the lock tongue, rotating shaft and torsion spring of Example 3 of the utility model.

[0074] Fig.31 This is a schematic diagram of the assembly of the lock tongue, the rotating shaft and the torsion spring of Example 3 of the utility model.

[0075] Fig.32 This is a schematic diagram of the states of the button assembly and the push rod when the lock tongue and the sliding block of Example 3 of the utility model are in a locked state.

[0076] Fig.33 This is a schematic diagram of the state in which the lock tongue of Example 3 of the utility model is inserted into the lock groove of the sliding block.

[0077] Fig.34 It is an enlarged cross-sectional view of the lock tongue of Example 3 of the utility model being engaged in the lock groove of the sliding block.

[0078] Fig.35 This is a schematic diagram of the states of the button assembly and the push rod when the lock tongue and the sliding block of Example 3 of the utility model are in the unlocked state.

[0079] Fig.36 This is a schematic diagram of the state in which the lock tongue of Example 3 of the utility model escapes from the lock groove of the sliding block.

[0080] Fig.37 This is the assembly effect of the sliding block and the common base of Example 3 of the utility model.

[0081] Fig.38 for Fig.37 A partial enlarged view of .

[0082] Fig.39 This is a schematic diagram of the assembly of the headrest mechanism of Example 4 of the present utility model.

[0083] Fig.40 This is an exploded view of the headrest mechanism of Example 4 of the present utility model.

[0084] Fig.41 This is a disassembled diagram of the motor assembly and the common base of Example 4 of the utility model.

[0085] Fig.42 This is an assembly effect diagram of the motor assembly and the common base of Example 4 of the utility model.

[0086] Fig.43 This is a perspective view of the assembly of the motor assembly and the common base of Example 4 of the utility model.

[0087] Legend: 1. Common base; 111. Second through hole; 112. Sliding block slot; 113. Mounting lock slot; 114. Mounting port; 115. Button connection section; 116. Motor fixing bolt hole; 117. Guide slot; 118. First through hole; 119. Rotating shaft hole; 1110. Motor slot; 2. Sliding block; 201. Lock slot; 3. Motor assembly; 30. Motor body; 31. Screw rod; 32. Sliding block; 4. Guide column; 5. Lock tongue; 6. Second spring; 7. Torsion spring; 8. Rotating shaft; 9. Push rod; 913. Pushing portion; 914. Clamping slot; 915. Spring installation Rod; 10. First spring; 11. Button body; 1111. Limit hook; 1112. Guide structure; 12. Button base; 1211. Buckle; 1212. Fixing groove; 13. Button connecting block; 14. Bushing; 1411. Fixing part; 1412. Limiting groove; 1413. Long groove; 15. Insert rod; 1511. Pin mouth; 1512. Slot; 16. Guide strip; 17. Pin; 18. Steel wire; 1811. Fixing section; 1812. Locking section; 19. Motor gasket; 20. Fixing bolt; 21. Rear shell; 2112. Mounting groove; 22. Soft covering layer. DETAILED DESCRIPTION

[0088] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0089] See also Figures 1 to 4 The utility model provides a common base which can be used for different headrest mechanisms. It can be applicable to both two-way adjustable headrest mechanisms and four-way adjustable headrest mechanisms. It is widely applicable and can solve the problem in the prior art that different bases need to be developed for headrest mechanisms with different adjustment methods.

[0090] The common base 1 of the utility model includes a first through hole 118, a second through hole 111 and a guide groove 117; wherein the first through hole 118 is extended along the front-to-back direction of the common base 1, and the first through hole 118 allows the guide column 4 to pass through the common base 1, so that the guide column 4 moves relative to the common base 1 to achieve adjustment of the headrest mechanism along the front-to-back direction; the second through hole 111 is extended longitudinally along the common base 1, and the second through hole 111 is used to accommodate the bushing 14 and allow the insertion rod 15 slidably arranged in the bushing 14 to pass through the common base 1, so that the common base 1 moves along the insertion rod 15 to achieve adjustment of the headrest mechanism along the longitudinal direction; the guide groove 117 is extended along the left-right direction of the common base 1, and the guide groove 117 is used to guide the push rod 9 to move along the left-right direction to achieve locking and unlocking between the bushing 14 and the insertion rod 15.

[0091] The utility model provides a common base 1 that can meet the use requirements of headrest mechanisms with different adjustment methods. The common base 1 is provided with a second through hole 111 extending longitudinally, so that the headrest mechanism can be longitudinally moved and adjusted relative to a rod inserted in the second through hole 111, that is, the height position of the headrest mechanism is adjusted, so that a two-way adjustable headrest mechanism with adjustable height can be obtained.

[0092] The common base 1 also realizes the front-to-back adjustment of the headrest mechanism relative to the common base 1 by setting a first through hole 118 extending in the front-to-back direction, that is, the front-to-back position of the headrest mechanism is adjusted. Combined with the height adjustment of the headrest mechanism, a four-way adjustable headrest mechanism can be obtained.

[0093] Embodiment 1:

[0094] See also Figures 5 to 8 A two-way adjustable headrest mechanism of the utility model includes the common base 1, bushing 14, insertion rod 15, push rod 9 and button assembly mentioned above, wherein the bushing 14 is fixedly installed in the second through hole 111 of the common base 1, and the second through hole 111 is located on the left and right sides of the common base 1; the insertion rod 15 is slidably arranged in the bushing 14 and passes through the common base 1; the push rod 9 is placed in the guide groove 117 of the common base 1 and can move along the guide groove 117, thereby realizing the unlocking between the bushing 14 and the insertion rod 15, and the common base 1 can be adjusted longitudinally along the insertion rod 15.

[0095] The two-way adjustable headrest mechanism is a height-adjustable headrest mechanism, wherein the insertion rod 15 is arranged to extend longitudinally, and the bottom of the insertion rod 15 can be fixed on the car seat. The common base 1 can be adjusted in height relative to the insertion rod 15 through the bushing 14 and the second through hole 111. After adjustment, the bushing 14 and the insertion rod 15 can be locked to fix the height position of the common base 1. When the height needs to be adjusted, the bushing 14 and the insertion rod 15 can be unlocked by pushing the push rod 9 and moving the push rod 9 along the guide groove 117. At this time, the common base 1 can be adjusted in height.

[0096] See also Fig. 9 and Fig.10 The button assembly includes a button body 11, a button base 12, and a second spring 6 disposed between the button body 11 and the button base 12. A limit hook 1111 is disposed on the button body 11, and a fixing groove 1212 is formed on the button base 12 corresponding to the limit hook 1111. The button body 11 is installed in the fixing groove 1212 of the button base 12 through the limit hook 1111 to fix the button base 12 and the button body 11. A guide structure 1112 is also formed on the button body 11, and the guide structure 1112 passes through the second spring 6 and the button base 12 in sequence to be connected to the push rod 9, so that when the button body 11 is pressed, the push rod 9 can be pushed to move.

[0097] The button body 11 and the second spring 6 are mounted on the button base 12, with one end of the second spring 6 abutting against the button body 11 and the other end abutting against the button base 12. The second spring 6 is used to achieve the reset of the button body 11. When the longitudinal adjustment of the headrest mechanism is completed, the restoring force of the second spring 6 resets the button body 11, thereby facilitating the next use.

[0098] See also Figures 11 to 14 Preferably, the bushing 14 is provided with a steel wire 18. Specifically, a fixing portion 1411 and a limiting groove 1412 are respectively formed on two adjacent side walls of the bushing 14. A fixing section 1811 and a locking section 1812 are formed on the steel wire 18. The fixing section 1811 of the steel wire 18 is fixed to the fixing portion 1411 of the bushing 14. The locking section 1812 of the steel wire 18 passes through the limiting groove 1412 of the bushing 14 to be clamped in the clamping groove 1512 of the insertion rod 15 (such as Fig.18 and Fig.19As shown). The plug rod 15 is provided with a plurality of slots 1512. When the locking section 1812 of the steel wire 18 is inserted into a slot 1512, the bushing 14 and the plug rod 15 are locked. When the headrest needs to be adjusted, the button body 11 can be pressed to push the push rod 9 so that the push rod 9 pushes the steel wire 18 out of the slot 1512 of the plug rod 15 to unlock the bushing 14 and the plug rod 15, so that the headrest mechanism can be height-adjusted longitudinally. Unlocking and height adjustment can be achieved by operating the button assembly, which is simple and convenient to operate. A pin hole 1511 that cooperates with the pin 17 is provided on the side of the plug rod 15, and a long slot 1413 extending in the longitudinal direction is provided on the bushing 14 adjacent to the fixing portion 1411. An installation hole 114 (as shown in FIG. 1 ) for facilitating the installation of the pin 17 is provided on the common base 1 corresponding to the long slot 1413. Figure 1 As shown in FIG. 1 , the pin 17 sequentially passes through the installation opening 114 and the long slot 1413 on the bushing 14 and then is inserted into the pin opening 1511. As the common base 1 is longitudinally adjusted along the insertion rod 15, the pin 17 moves in the long slot 1413 to prevent the insertion rod 15 from rotating, thereby ensuring that the slot 1512 on the insertion rod 15 always faces the steel wire 18. When the pin 17 moves to the two ends of the long slot 1413, the longitudinal adjustment of the common base 1 is limited, and the common base 1 is prevented from falling out of the insertion rod 15.

[0099] See also Figures 15 to 22 The push rod 9 is formed with two engaging grooves 914 on the steel wires 18 corresponding to the two bushings 14. When the bushing 14 and the plug rod 15 are in the locked state, the locking section 1812 of the steel wire 18 passes through the limiting groove 1412 of the bushing 14 and is engaged in the engaging groove 1512 of the plug rod 15. At the same time, the end of the locking section 1812 is engaged in the engaging groove 914, so that the movement of the push rod 9 can drive the movement of the locking section 1812. By pushing the push rod 9, the locking section 1812 is deflected relative to the limiting groove 1412 (such as Fig.21 As shown), it is disengaged from the card slot 1512 (as shown Fig. 22 As shown), the bushing 14 is unlocked from the insertion rod 15, and the common base 1 can slide longitudinally along the insertion rod 15, so that the height of the headrest can be adjusted.

[0100] See also Fig.16Furthermore, a first spring 10 is provided between the push rod 9 and the common base 1. Specifically, a spring mounting rod 915 is formed on the push rod 9. The first spring 10 is sleeved on the spring mounting rod 915, with one end against the push rod 9 and the other end against the common base 1. When the headrest needs to be adjusted, the button body 11 is pressed to move the push rod 9 and compress the first spring 10. After the height adjustment of the headrest is completed, the button body 11 is released, and the push rod 9 is reset under the action of the rebound force of the first spring 10, so that the locking section 1812 of the steel wire 18 is re-engaged in the limiting groove 1412 of the bushing 14 and the corresponding groove 1512 of the plug rod to lock the common base 1.

[0101] See also Fig.23 and Fig.24 A guide bar 16 is provided between the bushing 14 and the plug rod 15. The guide bar 16 is fixed on at least one inner side of the bushing 14. The guide bar 16 can eliminate the gap between the plug rod 15 and the bushing 14 to prevent the plug rod 15 from shaking during the longitudinal sliding process. Preferably, the guide bar 16 is made of PTFE, and a lubricating coating is provided on the side of the guide bar 16 that is in contact with the plug rod 15 to lubricate the plug rod 15; multiple guide bars 16 can also be provided. In the present utility model, two guide bars 16 are provided, and the two guide bars 16 are longitudinally arranged on the same inner side of the bushing 14.

[0102] In this embodiment, the two-way adjustable headrest mechanism also includes a shell composed of a front shell (not shown in the figure) and a rear shell 21. The front shell and the rear shell 21 form a hard package solution for the headrest. The front shell and the rear shell 21 are fixedly connected. As long as the common base 1 is fixedly connected to one of the two, the three can achieve synchronous movement.

[0103] The button assembly is mounted on the housing. In this embodiment, a buckle 1211 is formed on the button base 12, and a mounting groove 2112 is formed on the rear housing 21 corresponding to the buckle 1211. The buckle 1211 is clamped in the mounting groove 2112 to fix the rear housing 21 and the button base 12. It can be understood that the button base 12 can also be formed as one piece with the rear housing 21.

[0104] Embodiment 2:

[0105] See also Figure 25 to Figure 27In another preferred embodiment, the two-way adjustable headrest mechanism further includes a soft layer 22, which replaces the shell, and includes foam and a face cover wrapped outside the foam. The common base 1 is accommodated in the foam. When the common base 1 moves, the common base 1 drives the foam and the face cover to move longitudinally. Preferably, a button connecting section 115 is provided on the common base 1, and the button assembly further includes a button connecting block 13. One side of the button connecting block 13 is connected to the button connecting section 115, and the other side is clamped to the button base 12. It is conceivable that the button base 12 can also be formed as a whole with the button connecting block 13.

[0106] Except for the above differences, other structures of the second embodiment are the same as those of the first embodiment, which will not be described again here.

[0107] Embodiment three:

[0108] The utility model also provides a four-way adjustable headrest mechanism, and the structure of the four-way adjustable headrest mechanism is described below.

[0109] See also Fig.28 and Fig.29 The utility model provides a four-way adjustable headrest mechanism, comprising: the common base 1, bushing 14, insertion rod 15, guide column 4, shell, push rod 9 and button assembly as described above; wherein the bushing 14 is fixedly installed in the second through hole 111 of the common base 1, and the second through hole 111 is located on the left and right sides of the common base 1; the insertion rod 15 is slidably arranged in the bushing 14 and passes through the common base 1; the guide column 4 passes through the first through hole 118 of the common base 1; further, the first through hole 118 on the common base 1 is provided with a plurality of first through holes 118, and a plurality of first through holes 118 are symmetrically arranged between two second through holes 111 The shell includes a front shell (not shown in the figure) and a rear shell 21, and the front shell and the rear shell 21 form a hard package solution for the headrest. The front shell, the rear shell 21 and the guide column 4 are fixedly connected so that the shell can be moved relative to the common base 1 to realize the adjustment of the headrest mechanism along the front and rear directions. The setting of the guide column 4 plays a guiding and limiting role in the front and rear position adjustment of the shell, making the front and rear position adjustment of the shell more stable; the push rod 9 is placed in the guide groove 117 of the common base 1 and can move along the guide groove 117, so as to realize the unlocking between the bushing 14 and the insertion rod 15, and the shell and the common base 1 can be adjusted longitudinally along the insertion rod 15.

[0110] In this embodiment, the button assembly is the same as that in the first embodiment, including a button body 11, a button base 12, and a second spring 6 disposed between the button body 11 and the button base 12. The details will not be described here.

[0111] In this embodiment, the bushing 14 and the insertion rod 15 are the same as those in the first embodiment. The bushing 14 and the insertion rod 15 are locked and unlocked by a steel wire, which is also the same as in the first embodiment. A guide bar 16 is provided between the bushing 14 and the insertion rod 15, which is also the same as in the first embodiment and will not be repeated here.

[0112] In this embodiment, the push rod 9 is also provided with a first spring 10 and a clamping groove 914, which are the same as those in the first embodiment and will not be described again.

[0113] The four-way adjustment mechanism is a headrest mechanism with adjustable height and front-back position, wherein the insertion rod 15 is arranged longitudinally, and the bottom of the insertion rod 15 can be fixed on the car seat. The common base 1 can be adjusted in height relative to the insertion rod 15 through the bushing 14 and the second through hole 111. After adjustment, the bushing 14 and the insertion rod 15 can be locked to fix the height position of the common base 1. When the height needs to be adjusted, the bushing 14 and the insertion rod 15 can be unlocked by pushing the push rod 9 and moving the push rod 9 along the guide groove 117. At this time, the common base 1 can be adjusted in height, that is, the longitudinal adjustment of the headrest mechanism is achieved. In this embodiment, the push rod 9 is pushed by the button assembly to move along the guide groove 117, which not only realizes the unlocking between the bushing 14 and the insertion rod 15, but also realizes the unlocking between the sliding block 2 and the lock tongue 5, which is convenient and quick to operate.

[0114] See also Figure 30 to Figure 36 Furthermore, the four-way adjustable headrest mechanism also includes a sliding block 2 and a locking tongue 5. The sliding block 2 passes through the common base 1 in the front-to-back direction and is fixedly connected to the shell. The locking tongue 5 is rotatably arranged in the common base 1. A plurality of locking grooves 201 are arranged on the sliding block 2. The locking tongue 5 is inserted into the corresponding locking groove 201 by rotating the locking tongue 5, and the shell and the common base 1 are locked; when the locking tongue 5 is pushed by the push rod 9, the locking tongue 5 rotates and escapes from the locking groove 201, the sliding block 2 and the locking tongue 5 are unlocked, that is, the shell and the common base 1 are unlocked, and the shell can move relative to the common base 1 in the front-to-back direction.

[0115] See also Figure 1 , Figure 2 , Figure 4 and Fig.34 In the present utility model, a preferred embodiment is: the common base forms a mounting lock groove 113 corresponding to the lock tongue 5, the lock tongue 5 is installed in the mounting lock groove 113, the common base 1 forms a sliding block groove 112 that penetrates the common base 1 corresponding to the sliding block 2, and the sliding block 2 is slidably arranged in the sliding block groove 112. Fig.37 and Fig.38A guide bar 16 is provided between the sliding block 2 and the common base 1. The guide bar 16 is used to eliminate the gap between the sliding block 2 and the common base 1 to prevent the sliding block 2 from shaking during the y movement. A lubricating coating is also applied on the guide bar 16. The lubricating coating allows the sliding block 2 to slide smoothly.

[0116] See also Fig.15 , Fig.16 , Figure 30 to Figure 36 The lock tongue 5 is rotatably arranged in the common base 1. A shaft hole 119 is formed in the common base 1. A shaft 8 is arranged in the shaft hole 119. The lock tongue 5 is arranged on the shaft 8. A torsion spring 7 is arranged between the shaft 8 and the lock tongue 5. The lock tongue 5 is arranged corresponding to the sliding block 2. A push portion 913 is formed on the push rod 9 corresponding to the lock tongue 5. When the button body 11 is pressed, the push rod 9 is pushed. The push portion 913 of the push rod 9 pushes the lock tongue 5 to rotate around the shaft 8, so that the lock tongue 5 is disengaged from the lock groove 201. The housing and the common base 1 are unlocked. The housing can move in the front-to-back direction relative to the common base 1. At this time, the torsion spring 7 stores kinetic energy. After the front-to-back direction adjustment is completed, the torsion spring 7 releases the stored kinetic energy, so that the lock tongue 5 is reset and stuck in the lock groove 201 at the corresponding position.

[0117] The four-way adjustable headrest mechanism can be unlocked by manually operating the button assembly, which can be used to adjust the height as well as the front and rear position. The operation is simple and convenient.

[0118] Embodiment 4:

[0119] The difference between this embodiment and the third embodiment is that the sliding block and the locking tongue are eliminated, and the adjustment of the front and rear directions of the headrest mechanism is changed to electric control. Figure 2 , Figure 3 and Figure 40 to Figure 43 The common base 1 is formed with a motor slot 1110 corresponding to the installation position of the motor assembly 3. The motor assembly 3 is installed in the motor slot 1110. The common base 1 is formed with a motor fixing bolt hole 116. The motor assembly 3 is threadedly connected to the motor fixing bolt hole 116 of the common base 1 by a fixing bolt 20 to fix the motor assembly 3 and the common base 1. A motor gasket 19 is arranged between the motor assembly 3 and the common base 1 to play a shock absorbing role. The motor assembly 3 includes a motor body 30, a screw rod 31 threadedly connected to the motor body 30, and a slider 32 fixed on the screw rod 31. The slider 32 is fixedly connected to the housing. When the screw rod 31 moves in the front-to-back direction relative to the motor body 30, the slider 32 drives the housing to adjust in the front-to-back direction along the guide column 4 relative to the common base 1. This design requires less space in the front-to-back direction.

[0120] The utility model is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various variations of the utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation of the utility model, and the scope of protection of the utility model shall be defined by the scope of the attached claims.

Claims

1. A common base suitable for different headrest mechanisms, characterized in that: The common base comprises: a first through hole (118) extending in the front-to-rear direction of the common base (1), the first through hole (118) being used for allowing the guide column (4) to pass through the common base (1), so that the guide column (4) can move relative to the common base (1) to achieve adjustment of the headrest mechanism in the front-to-rear direction; a second through hole (111) extending longitudinally along the common base (1), the second through hole (111) being used to accommodate a bushing (14) and to allow an insertion rod (15) slidably disposed in the bushing (14) to pass through the common base (1), so that the common base (1) moves along the insertion rod (15) to achieve longitudinal adjustment of the headrest mechanism; A guide groove (117) extending in the left-right direction along the common base (1), the guide groove (117) being used to guide the push rod (9) to move in the left-right direction so as to achieve locking and unlocking between the bushing (14) and the insertion rod (15).

2. A headrest mechanism, characterized in that: include: The common base (1) according to claim 1; a bushing (14) fixedly mounted in the second through hole (111) of the common base (1), wherein the second through hole (111) is located on the left and right sides of the common base (1); An insertion rod (15) slidably disposed in the bushing (14); A push rod (9), the push rod (9) being placed in the guide groove (117) of the common base (1); A button assembly is provided with a button body (11), wherein the button body (11) pushes the push rod (9) to move along the guide groove (117), thereby achieving unlocking between the bushing (14) and the insertion rod (15), and the common base can be adjusted longitudinally along the insertion rod (15).

3. The headrest mechanism according to claim 2, characterized in that: It also includes a steel wire (18) fixed on the bushing (14) and a plurality of slots (1512) arranged on the insertion rod (15); When the steel wire (18) is inserted into the slot (1512), the bushing (14) and the insertion rod (15) are locked; When the button body (11) pushes the push rod (9) to move along the guide groove (117), the push rod (9) pushes the steel wire (18) to disengage from the slot (1512), and the bushing (14) and the insertion rod (15) are unlocked, so that the common base (1) can be adjusted longitudinally along the insertion rod (15).

4. The headrest mechanism according to claim 2, characterized in that: The push rod (9) is connected to the common base (1) via a first spring (10), and the first spring (10) provides a restoring force for the push rod (9).

5. The headrest mechanism according to claim 2, characterized in that: The bushing (14) is provided with a long slot (1413) extending in the longitudinal direction, and the pin (17) passes through the long slot (1413) and is inserted into the insertion rod (15). The pin (17) moves in the long slot (1413) to limit the longitudinal adjustment position of the common base (1).

6. The headrest mechanism according to claim 2, characterized in that: It also comprises a shell, which is fixedly connected to the common base (1) so that the shell can be adjusted longitudinally along the insertion rod (15).

7. The headrest mechanism according to claim 2, characterized in that: The button assembly also includes a second spring (6) sleeved on the button body (11) to provide a restoring force for resetting the button body (11).

8. The headrest mechanism according to claim 7, characterized in that: It also includes a soft covering layer (22), wherein the soft covering layer (22) includes foam and a face cover covering the foam, and the common base (1) is accommodated in the foam so that the soft covering layer (22) can be adjusted longitudinally along the insertion rod (15).

9. The headrest mechanism according to claim 8, characterized in that: The common base further comprises a button connecting section (115), and the button assembly further comprises a button connecting block (13), wherein the button connecting block (13) is connected to the button connecting section (115), and the button body (11) is mounted on the button connecting block (13) and is movable relative to the button connecting block (13).

10. A headrest mechanism, characterized in that: include: The common base (1) according to claim 1; a bushing (14) fixedly mounted in the second through hole (111) of the common base (1), wherein the second through hole (111) is located on the left and right sides of the common base (1); An insertion rod (15) slidably disposed in the bushing (14); a guide post (4) passing through the first through hole (118) of the common base (1); A shell, the shell being fixedly connected to the guide column (4) so ​​that the shell can move relative to the common base (1) to achieve adjustment of the headrest mechanism in the front-rear direction; A push rod (9), the push rod (9) being placed in the guide groove (117) of the common base (1), the push rod (9) being connected to the common base (1) via a first spring (10), the first spring (10) providing a restoring force for the push rod (9); A button assembly, comprising a button body (11) and a second spring (6) sleeved on the button body (11), wherein the second spring (6) provides a restoring force for the button body (11) to return to its original position. The button body (11) passes through the shell (21) to push the push rod (9) to move along the guide groove (117), thereby achieving unlocking between the bushing (14) and the insertion rod (15), so that the shell and the common base can be adjusted longitudinally along the insertion rod (15).

11. The headrest mechanism according to claim 10, characterized in that: It also includes a steel wire (18) fixed on the bushing (14) and a plurality of slots (1512) arranged on the insertion rod (15); When the steel wire (18) is inserted into the slot (1512), the bushing (14) and the insertion rod (15) are locked; When the steel wire (18) is released from the slot (1512), the bushing (14) and the insertion rod (15) are unlocked.

12. The headrest mechanism according to claim 11, characterized in that: When the button body (11) pushes the push rod (9) to move along the guide groove (117), the push rod (9) pushes the steel wire (18) to disengage from the slot (1512) to achieve unlocking between the bushing (14) and the insertion rod (15), so that the shell and the common base can be adjusted longitudinally along the insertion rod (15).

13. The headrest mechanism according to claim 12, characterized in that: It also comprises a sliding block (2) and a locking tongue (5), wherein the sliding block (2) passes through the common base (1) in the front-to-back direction and is fixedly connected to the shell, a plurality of locking grooves (201) are arranged on the sliding block (2), and the locking tongue (5) is arranged inside the common base (1); When the locking tongue (5) is inserted into the locking groove (201), the sliding block (2) and the common base (1) are locked; When the locking tongue (5) escapes from the locking groove (201), the sliding block (2) and the locking tongue (5) are unlocked.

14. The headrest mechanism according to claim 13, characterized in that: When the button body (11) pushes the push rod (9) to move along the guide groove (117), the push rod (9) pushes the lock tongue (5) to disengage from the lock groove (201) to achieve unlocking between the sliding block (2) and the lock tongue (5), so that the shell can move in the front-rear direction relative to the common base (1).

15. The headrest mechanism according to claim 12, characterized in that: The common base (1) is provided with a receiving groove (1110) for receiving the motor assembly, and the housing is driven by the motor assembly to move in a front-rear direction relative to the common base (1).

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