Lifting adjusting mechanism applied to backrest
By introducing key holes, through holes and drive parts of the substrate and lifting beam into the backrest adjustment mechanism, the backside operation and stable sliding connection are realized, solving the problem of inconvenient operation of the backrest adjustment mechanism and improving the user experience.
Patent Information
- Application Number
- CN202510502003.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2025-07-08
AI Technical Summary
The existing backrest adjustment mechanism is inconvenient to operate, especially in narrow areas.
The substrate and lifting beam structure are adopted. By setting a lock hole and a through hole on the substrate, the drive member is inserted into the through hole, and the drive lock pin slides in the lock hole to achieve locking and unlocking, providing a back operating space, and combining the guide groove and the guide bar to ensure a stable sliding connection.
It provides a wide operating space and can be operated by one hand by the user, which improves the convenience and stability of the adjustment mechanism and solves the problem of inconvenient operation of the traditional adjustment mechanism.
Smart Images
Figure CN120267119A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of backrest lifting and adjusting, and in particular relates to a lifting and adjusting mechanism applied to a backrest. Background Art
[0002] A backrest is a household item that supports the waist and back of a person. Currently, most backrests have the function of adjusting the height according to the needs of the user to improve the comfort of the user. However, there are still some problems with the existing adjustment mechanism. For example, the operating position of the adjustment mechanism is in a relatively small area, there is not enough operating space, and the adjustment is inconvenient. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide a lifting and lowering adjustment mechanism for a backrest to solve the technical problem that a traditional adjustment mechanism is inconvenient to operate.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a lifting and adjusting mechanism for a backrest includes a base plate and at least one lifting beam arranged up and down, each lifting beam is connected to the base plate in an up and down sliding manner, and each lifting beam is respectively provided with a locking pin for locking itself and a driving member for driving the locking pin to unlock. The base plate is provided with a plurality of longitudinally arranged locking holes cooperating with the locking pin, and the base plate is also provided with a through hole opposite to the driving member, the driving member is inserted into the through hole and can slide up and down along the through hole following the lifting beam, and when the locking pin is inserted into the corresponding locking hole, the position of the corresponding lifting beam and the base plate remains locked.
[0005] As a preferred embodiment, any of the lifting beams is provided with an embedding groove for embedding a locking pin, the locking pin is inserted into the embedding groove, and a spring is also provided between the bottom surface of the embedding groove and the bottom end of the locking pin, the elastic force of the spring drives the front end of the locking pin to insert into the locking hole, the lower part of the locking pin expands and is blocked by a blocking member to prevent it from escaping from the embedding groove, and a radially extending slot is provided on one side of the locking pin, and the inner wall of the slot on the side away from the base plate is a pressure-bearing inclined surface inclined outwardly, and the driving member is a sliding block, which is slidably connected to the lifting beam on one side of the locking pin, one end of the driving member is opposite to the slot and is provided with a crimping surface that matches the pressure-bearing inclined surface, and the crimping surface is also inclined, and the sliding direction of the driving member is opposite to the slot, and when the crimping surface of the driving member is inserted into the slot, the crimping surface crimps the pressure-bearing inclined surface of the slot and squeezes the locking pin to the bottom of the embedding groove, so that the head of the locking pin retracts and separates from the corresponding lock hole to achieve unlocking; after releasing the driving member, the locking pin and the driving member are both reset under the elastic force of the spring.
[0006] As a preferred solution, a slide groove connected to the embedding groove is provided on the lifting beam, and the driving member is slidably embedded in the slide groove. The driving member has a paddle extending out of the slide groove and toward the base plate. The blocking member is a cover plate, which covers the lifting beam and covers the embedding groove and the slide groove. The blocking member is provided with a through hole for the locking pin head and the paddle to extend out.
[0007] As a preferred solution, strip-shaped blind holes corresponding to the lock pins one by one are provided on the substrate. The major axis of the blind hole is parallel to the lifting direction of the lifting beam. A plurality of lock holes are provided on the inner bottom surface of the blind hole and are discretely arranged along the major axis direction of the blind hole. Guide strips extending outward in the left and right directions are respectively provided at the left and right ends of any one lifting beam. Guide grooves slidably adapted to the guide strips on both sides of the lifting beam are respectively provided on both sides of the surface of the substrate facing the lifting beam. The guide strips at both ends of the lifting beam are slidably inserted into the guide grooves one by one and slide up and down along the guide grooves. The extending direction of the guide groove is parallel to the major axis direction of the blind hole. The maximum distance that the driving member drives the lock pin to move is greater than the depth of the lock pin inserted into the lock hole and less than the sum of the depth of the lock pin inserted into the lock hole and the depth of the blind hole.
[0008] As a preferred solution, two lock pins and two driving members are symmetrically arranged on the left and right of any one lifting beam. The two lock pins are located between the two driving members. The distance between the two driving members satisfies that the user can pinch with the thumb and index finger of one hand.
[0009] As a preferred solution, a convex block is provided on the surface of the lifting beam facing away from the substrate. The embedding groove extends into the convex block. An adjustment window is provided on the side surface of the convex block, and the adjustment window faces the spring.
[0010] As a preferred solution, the enlarged part at the lower part of the lock pin is a rectangular cube block. A slot is provided on one surface of the rectangular cube block facing the driving member. The embedding groove is adapted to the rectangular cube block.
[0011] As a preferred solution, there are two lifting beams.
[0012] The beneficial effects of the present invention are as follows: By arranging the driving member on the surface of the lifting beam facing the substrate and providing a through hole on the substrate opposite to the driving member, the present invention enables the user to control the driving member from the back surface of the substrate to perform lifting adjustment on the lifting adjustment mechanism. The back surface of the substrate has a wide adjustment space and does not limit the operation range of the user. Therefore, the technical problem of inconvenient operation of the traditional adjustment mechanism can be effectively solved. Description of the Drawings
[0013] The following further details the specific embodiments of the present invention with reference to the drawings, where: Figure 1 is an exploded view of the specific structure of the lifting adjustment mechanism described in the specific embodiment; Figure 2 is a front view of the substrate described in the specific embodiment; Figure 3 is a schematic diagram of the specific assembly structure of the lock pin and the driving member described in the specific embodiment; Figure 4 is a schematic diagram of the specific structure of the driving member described in the specific embodiment; Figure 5is a schematic diagram of the specific structure of the lifting and lowering beam described in the specific implementation method; Figures 1 to 5 In: 1. Base plate; 2. Lifting beam; 3. Lock pin; 4. Driving member; 5. Lock hole; 6. Through hole; 7. Embossed groove; 8. Spring; 9. Blocking member; 10. Slot; 11. Pressure inclined surface; 12. Pressing surface; 13. Slide groove; 14. Pick; 15. Through hole; 16. Bump; 17. Rectangular cube; 18. Adjustment window; 19. Blind hole; 20. Guide strip; 21. Guide groove; 22. Bump. DETAILED DESCRIPTION
[0014] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
[0015] like Figures 1 to 5 The lifting and adjusting mechanism for a backrest shown in the figure comprises a base plate 1 and two lifting beams 2 arranged vertically, each lifting beam 2 is connected to the base plate 1 by sliding up and down, and each lifting beam 2 is provided with a locking pin 3 for locking itself and a driving member 4 for driving the locking pin 3 to unlock, as shown in FIG. Figure 2 As shown, the base plate 1 is provided with a plurality of longitudinally arranged lock holes 5 that cooperate with the lock pin 3, and the base plate 1 is also provided with a through hole 6 that is opposite to the driving member 4. The driving member 4 is inserted into the through hole 6 and can slide up and down along the through hole 6 following the lifting beam 2. When the lock pin 3 is inserted into the corresponding lock hole 5, the corresponding lifting beam 2 and the base plate 1 are locked. When the height of the lifting beam 2 needs to be adjusted, the user controls the driving member 4 from the back of the base plate 1 to make the lock pin 3 withdraw from the lock hole 5, and then moves the lifting beam 2 up and down to a suitable position and resets the lock pin 3, so that the lock pin 3 is inserted into the lock hole 5 at the height position to keep the height of the lifting beam 2 constant. In this way, the user has a larger operating space and the operation is more convenient.
[0016] like Figure 3 As shown, any of the lifting beams 2 is provided with an embedding groove 7 for embedding the lock pin 3, the lock pin 3 is inserted into the embedding groove 7, and a spring 8 is further provided between the bottom surface of the embedding groove 7 and the bottom end of the lock pin 3. The elastic force of the spring 8 drives the front end of the lock pin 3 to insert into the lock hole 5, the lower part of the lock pin 3 expands and is blocked by the blocking member 9 to avoid escaping from the embedding groove 7, a radially extending slot 10 is provided on one side of the lock pin 3, and the inner wall of the slot 10 on the side away from the base plate 1 is an outwardly inclined pressure slope 11, the driving member 4 is a slider, slidably connected to the lifting beam 2 on one side of the lock pin 3, one end of the driving member 4 is opposite to the slot 10 and is provided with a pressing surface 12 that matches the pressure slope 11, as shown in FIG. Figure 4As shown, the crimping surface 12 is also inclined. The sliding direction of the driving member 4 faces the slot 10 directly. When the crimping surface 12 of the driving member 4 is inserted into the slot 10, the crimping surface 12 crimps the pressure-receiving inclined surface 11 of the slot 10 and squeezes the locking pin 3 towards the bottom of the embedding groove 7, causing the head of the locking pin 3 to retract and separate from the corresponding locking hole 5 to achieve unlocking. After releasing the driving member 4, both the locking pin 3 and the driving member 4 are reset under the elastic force of the spring 8. The cooperation structure of the driving member 4 and the locking pin 3 adopted in this embodiment can realize the automatic reset and locking of the locking pin 3, improving the locking reliability of the locking pin 3 for the lifting beam 2.
[0017] In this embodiment, a sliding groove 13 communicating with the embedding groove 7 is provided on the lifting beam 2. The driving member 4 is slidably embedded in the sliding groove 13. The driving member 4 has a dial 14 extending out of the sliding groove 13 and towards the substrate 1. The blocking member 9 is a cover plate. The blocking member 9 covers the lifting beam 2, covering the embedding groove 7 and the sliding groove 13. A through hole 15 for the head of the locking pin 3 and the dial 14 to extend out is provided on the blocking member 9. Connecting the sliding groove 13 and the embedding groove 7 can improve the cooperation precision between the driving member 4 and the locking pin 3, ensuring that the driving member 4 accurately inserts into the slot 10 of the locking pin 3. At the same time, using the blocking member 9 to cover both the locking pin 3 and the driving member 4 can effectively improve the integrity of the locking pin 3, the driving member 4 and the lifting beam 2, and improve the assembly convenience of the lifting beam 2 and the substrate 1.
[0018] In this embodiment, two locking pins 3 and two driving members 4 are symmetrically arranged left and right on any lifting beam 2. The two locking pins 3 are located between the two driving members 4. The distance between the two driving members 4 satisfies that the user can pinch with the thumb and index finger of one hand. Such a layout makes it more convenient for the user to operate. When adjusting the lifting of the lifting beam 2, it can be completed with one hand.
[0019] The enlarged part at the lower part of the locking pin 3 is a rectangular cube 17. One surface of the rectangular cube 17 faces the driving member 4 and is provided with a slot 10. The embedding groove 7 is adapted to the rectangular cube 17. The rectangular cube 17 can effectively prevent the locking pin from rotating. Cooperating with the adapted embedding groove 7, it ensures that the slot 10 faces the driving member 4.
[0020] Although two lifting beams 2 are used as an example in this embodiment, in actual applications, the number of lifting beams 2 can be increased or decreased according to the requirements of different dimensions such as the number of backrests and the support strength.
[0021] In this embodiment, long strip-shaped blind holes 19 corresponding to the locking pins 3 one by one are formed in the substrate 1. The major axis of the blind hole 19 is parallel to the lifting direction of the lifting beam 2. A plurality of locking holes 5 are formed on the inner bottom surface of the blind hole 19 and are discretely arranged along the major axis direction of the blind hole 19. Guide strips 20 extending outward in the left and right directions are respectively arranged at the left and right ends of any lifting beam 2. Guide grooves 21 slidably adapted to the guide strips 20 on both sides of the lifting beam 2 are respectively arranged on both sides of the surface of the substrate 1 facing the lifting beam 2. The guide strips 20 at both ends of the lifting beam 2 are slidably inserted into the guide grooves 21 one by one and slide up and down along the guide grooves 21, so as to realize the sliding connection between the lifting beam 2 and the substrate 1. The extending direction of the guide groove 21 is parallel to the major axis direction of the blind hole 19. The maximum distance that the driving member 4 drives the locking pin 3 to move is greater than the depth of the locking pin 3 inserted into the locking hole 5 and less than the sum of the depth of the locking pin 3 inserted into the locking hole 5 and the depth of the blind hole 19. In this way, when the locking pin 3 is driven by the driving member 4 to disengage from the locking hole 5, it will not disengage from the blind hole 19, so as to use the blind hole 19 to limit the lifting range of the lifting beam 2.
[0022] In this embodiment, the guide grooves 21 are formed on the facing surfaces of the convex strips 22 on both sides of the substrate 1. In this way, the convex strips 22 can limit the lifting beam 2 from disengaging from the substrate 1 through the guide strips 20. At the same time, when the lifting beam 2 lifts within the major axis range of the blind hole 19, the guide strips 20 are always kept in the guide grooves 21, and this structure is used to maintain the sliding connection stability between the lifting beam 2 and the substrate.
[0023] In this embodiment, a convex block 16 is further arranged on the surface of the lifting beam 2 facing away from the substrate 1, and the embedding groove 7 extends into the convex block 16. The convex block 16 can be used to limit the deformation amount of the backrest connected to the lifting beam, and avoid damage caused by excessive deformation of the backrest.
[0024] An adjustment window 18 is formed on the side surface of the convex block 16, and the adjustment window 18 is directly opposite to the spring 8. The user can press the spring through the adjustment window to further retract the locking pin 3 to disengage from the blind hole 19, so as to realize the disassembly of the lifting beam 2. Therefore, the spring 8 is preferably fixedly connected to the locking pin 3, and when the locking pin fully extends, the distance between the locking pin 3 and the bottom surface of the embedding groove 7 is greater than the sum of the actual depths of the locking pin 3 inserted into the blind hole 19 and the locking hole 5.
[0025] The working process of the present invention is as follows: As Figure 1 shown, when the user installs the lifting beam 2, the locking pin 3 can be pressed into the embedding groove 7 by using the substrate 1, and then the guide strips 20 at both ends of the lifting beam 2 are slid into the guide grooves 21. After the guide strips 20 are slid into the guide grooves 21, the lifting beam 2 is restricted by the convex strips 22 and will not reverse and disengage from the front surface of the substrate 1. At the same time, after the locking pin 3 is slid into the blind hole 19, the locking pin 3 is inserted into the blind hole 19, and the lifting beam 2 is restricted from sliding out of the guide groove 21 in the up and down direction. Thus, a reliable sliding connection between the lifting beam 2 and the substrate is realized.
[0026] After the locking pin 3 is inserted into the slot 7, it will further insert into a certain locking hole 5 during the sliding process, thereby locking the lifting beam 2 at a certain height. When the user needs to adjust the height of the lifting beam 2, pinch the paddles 14 of the two driving members 4 on the lifting beam 2 with the thumb and index finger from the back of the base plate 1 at the same time. The driving member 4 is driven by the paddle 14 to insert into the slot 10 on the side of the corresponding locking pin 3. The pressing surface 12 on the driving member 4 presses the pressed inclined surface 11 of the locking pin 3, and then drives the locking pin 3 to move towards the bottom of the slot 7. The locking pin exits the locking hole 5. The user holds the two paddles 14 and moves up or down at the same time, then can move the lifting beam 2 up and down. After moving the lifting beam 2 to the appropriate height, release the two paddles 14, and move the lifting beam 2 up or down again to make the locking pin 3 insert into the locking hole 5.
[0027] When the lifting beam needs to be removed, the user uses a tool to compress the spring 8 through the adjustment window 18 on the bump 16, so that the spring 8 drives the locking pin 3 to exit the blind hole 19, and then slides the lifting beam 2 out of the guiding groove 21, that is, the disassembly is completed.
[0028] The lifting adjustment mechanism applied to the backrest described in the present invention is convenient to adjust, reliable in assembly, stable in the use process, effectively solves the technical problem of inconvenient operation of the traditional adjustment mechanism, and has a good market prospect.
[0029] The above embodiments only illustrate the principle and efficacy of the present invention by way of example, and some applied embodiments, rather than limiting the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.
Claims
1. A lifting adjustment mechanism applied to a backrest, characterized in that, It includes a substrate (1) and at least one lifting beam (2) arranged vertically. Each lifting beam (2) is slidably connected to the substrate (1) vertically. On each lifting beam (2), there are respectively provided a locking pin (3) for locking itself and a driving member (4) for driving the unlocking of the locking pin (3). A plurality of longitudinally arranged locking holes (5) cooperating with the locking pin (3) are formed on the substrate (1). A through hole (6) opposite to the driving member (4) is also formed on the substrate (1). The driving member (4) is inserted into the through hole (6) and can slide up and down along the through hole (6) following the lifting beam (2). When the locking pin (3) is inserted into the corresponding locking hole (5), the position of the corresponding lifting beam (2) and the substrate (1) is kept locked.
2. The lifting and adjusting mechanism applied to the backrest according to claim 1, characterized in that, On any one of the lifting beams (2), there is an embedding groove (7) for embedding the locking pin (3). The locking pin (3) is inserted into the embedding groove (7). A spring (8) is also arranged between the bottom surface of the embedding groove (7) and the bottom end of the locking pin (3). The elastic force of the spring (8) drives the front end of the locking pin (3) to insert into the locking hole (5). The lower part of the locking pin (3) bulges and is blocked by a blocking member (9) to prevent it from disengaging from the embedding groove (7). A radially extending slot (10) is formed on one side of the locking pin (3). The inner wall of the slot (10) on the side away from the substrate (1) is a pressure-receiving inclined surface (11) inclined outward. The driving member (4) is a slider, slidably connected to the lifting beam (2) on one side of the locking pin (3). One end of the driving member (4) faces the slot (10) and is provided with a pressure-connecting surface (12) cooperating with the pressure-receiving inclined surface (11). The pressure-connecting surface (12) is also inclined. The sliding direction of the driving member (4) is directly opposite to the slot (10). When the pressure-connecting surface (12) of the driving member (4) is inserted into the slot (10), the pressure-connecting surface (12) presses the pressure-receiving inclined surface (11) of the slot (10) and squeezes the locking pin (3) towards the bottom of the embedding groove (7), causing the head of the locking pin (3) to retract and separate from the corresponding locking hole (5) to achieve unlocking. After releasing the driving member (4), both the locking pin (3) and the driving member (4) are reset under the elastic force of the spring (8).
3. The lifting and adjusting mechanism applied to the backrest according to claim 2, characterized in that, A sliding groove (13) communicating with the embedding groove (7) is formed on the lifting beam (2). The driving member (4) is slidably embedded in the sliding groove (13). The driving member (4) has a dial (14) extending out of the sliding groove (13) and extending towards the substrate (1). The blocking member (9) is a cover plate. The blocking member (9) covers the lifting beam (2), covering the embedding groove (7) and the sliding groove (13). A through hole (15) for the head of the locking pin (3) and the dial (14) to extend out is formed on the blocking member (9).
4. The lifting and adjusting mechanism applied to the backrest according to claim 2, characterized in that, The substrate (1) is provided with elongated blind holes (19) corresponding one by one to the locking pins (3). The major axis of the blind hole (19) is parallel to the lifting direction of the lifting beam (2). A plurality of locking holes (5) are arranged discretely along the major axis direction of the blind hole (19) on the inner bottom surface of the blind hole (19). At the left and right ends of any lifting beam (2), guide strips (20) extending outward in the left and right directions are respectively provided. On both sides of the surface of the substrate (1) facing the lifting beam (2), guide grooves (21) slidably adapted to the guide strips (20) on both sides of the lifting beam (2) are respectively provided. The guide strips (20) at both ends of the lifting beam (2) are slidably inserted into the guide grooves (21) one by one and slide up and down along the guide grooves (21). The extending direction of the guide grooves (21) is parallel to the major axis direction of the blind hole (19). The maximum distance that the driving member (4) drives the locking pin (3) to move is greater than the depth of the locking pin (3) inserted into the locking hole (5) and less than the sum of the depth of the locking pin (3) inserted into the locking hole (5) and the depth of the blind hole (19).
5. The lifting and adjusting mechanism applied to the backrest according to claim 4, characterized in that, On any lifting beam (2), two locking pins (3) and two driving members (4) are symmetrically arranged left and right. The two locking pins (3) are located between the two driving members (4). The distance between the two driving members (4) satisfies that the user can pinch with the thumb and index finger of one hand.
6. The lifting and adjusting mechanism applied to the backrest according to claim 4, characterized in that, On the surface of the lifting beam (2) facing away from the substrate (1), a convex block (16) is provided. The embedding groove (7) extends into the convex block (16). An adjusting window (18) is provided on the side surface of the convex block (16), and the adjusting window (18) faces the spring (8).
7. The lifting and adjusting mechanism applied to the backrest according to claim 1, characterized in that, The lower enlarged part of the locking pin (3) is a rectangular cube (17). A slot (10) is provided on one surface of the rectangular cube (17) facing the driving member (4). The embedding groove (7) is adapted to the rectangular cube (17).
8. The lift adjustment mechanism applied to the backrest according to claim 1, characterized in that, There are two lifting beams (2).