Lifting adjusting mechanism applied to backrest

Abstract

The lifting adjusting mechanism comprises a base plate and at least one lifting beam arranged up and down, the lifting beams are connected to the base plate in an up-down sliding mode, and each lifting beam is provided with a lock pin used for locking the lifting beam and a driving piece used for driving the lock pin to unlock. The base plate is provided with a plurality of longitudinally-arranged lock holes matched with the lock pins, the base plate is further provided with through holes opposite to the driving pieces, and the driving pieces are inserted into the through holes and can slide up and down along with the lifting beam along the through holes. The driving part is arranged on the face, facing the base plate, of the lifting beam, the through hole is formed in the base plate and right faces the driving part, so that a user can control the driving part from the back face of the base plate to conduct lifting adjustment on the lifting adjusting mechanism, the back face of the base plate has a wide adjusting space, and the operation range of the user cannot be limited; therefore, the technical problem that a traditional adjusting mechanism is inconvenient to operate can be effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of backrest height adjustment, specifically relating to a height adjustment mechanism applied to backrests. Background Technology

[0002] A backrest is a type of home furnishing that supports the lower back. Most backrests currently have height-adjustable functions to improve user comfort. However, existing adjustment mechanisms still have some problems, such as the operating area being relatively small, lacking sufficient space, and making adjustment inconvenient. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lifting and adjusting mechanism for backrests, thereby solving the technical problem of inconvenient operation of traditional adjusting mechanisms.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a lifting adjustment mechanism for a backrest, including a base plate and at least one vertically arranged lifting beam. Each lifting beam is slidably connected to the base plate. Each lifting beam is 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 vertically arranged locking holes that cooperate with the locking pin. 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. 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 aforementioned lifting beams is provided with a groove for embedding a locking pin. The locking pin is inserted into the groove, and a spring is also provided between the bottom surface of the groove and the bottom end of the locking pin. The spring force drives the front end of the locking pin to insert into the lock hole. The lower part of the locking pin expands and is blocked by a blocking member to prevent it from dislodging from the groove. A radially extending slot is provided on one side of the locking pin. The inner wall of the slot on the side away from the base plate is an outwardly inclined pressure slope. The driving member is a slider that 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 pressing surface that cooperates with the pressure slope. The pressing surface is also inclined. The sliding direction of the driving member is directly opposite the slot. When the pressing surface of the driving member is inserted into the slot, the pressing surface presses against the pressure slope of the slot and squeezes the locking pin towards the bottom of the groove, causing the head of the locking pin to retract and separate from the corresponding lock hole to achieve unlocking. After the driving member is released, both the locking pin and the driving member are reset under the action of the spring force.

[0006] As a preferred embodiment, the lifting beam has a sliding groove communicating with the recessed groove, the driving component is slidably embedded in the sliding groove, the driving component has a lever extending out of the sliding groove and extending towards the base plate, the blocking component is a cover plate, the blocking component covers the lifting beam, covering the recessed groove and the sliding groove, and the blocking component has a through hole for the locking pin head and the lever to extend out.

[0007] As a preferred embodiment, the substrate has elongated blind holes corresponding to the locking pins. The major axis of the blind holes is parallel to the lifting direction of the lifting beam. Multiple locking holes are discretely arranged along the major axis of the blind holes on the inner bottom surface of the blind holes. Guide strips extending outward in the left and right directions are respectively provided at the left and right ends of any lifting beam. Guide grooves that slide and adapt to the guide strips on both sides of the side of the substrate facing the lifting beam are respectively provided. The guide strips at both ends of the lifting beam are slidably inserted into the guide grooves and slide up and down along the guide grooves. The extension direction of the guide grooves is parallel to the major axis of the blind holes. The maximum distance that the driving component drives the locking pins to move is greater than the depth of the locking pins inserted into the locking holes and less than the sum of the depths of the locking pins inserted into the locking holes and the blind holes.

[0008] As a preferred option, two locking pins and two driving components are symmetrically arranged on each lifting beam. The two locking pins are located between the two driving components, and the distance between the two driving components is sufficient for the user to pinch with one hand using their thumb and forefinger.

[0009] As a preferred embodiment, the lifting beam has a protrusion on the side facing away from the base plate, the groove extends into the protrusion, and an adjustment window is provided on the side of the protrusion, with the adjustment window facing the spring.

[0010] As a preferred embodiment, the lower enlarged portion of the locking pin is a rectangular cube, one face of which faces the driving component and has a slot, the slot being adapted to the rectangular cube.

[0011] As a preferred embodiment, the lifting beam has two beams.

[0012] The beneficial effects of this utility model are as follows: By setting the driving component on the side of the lifting beam facing the base plate and opening a through hole on the base plate to face the driving component, this utility model provides users with the ability to control the driving component to adjust the lifting mechanism from the back of the base plate. The back of the base plate has a wide adjustment space and does not limit the user's operating range. Therefore, it can effectively solve the technical problem of the inconvenience of operation of traditional adjustment mechanisms. Attached Figure Description

[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0014] Figure 1 This is an exploded view of the specific structure of the lifting and adjusting mechanism described in the specific implementation method;

[0015] Figure 2 This is a front view of the substrate described in the specific embodiment;

[0016] Figure 3 This is a schematic diagram of the specific assembly structure of the locking pin and the driving component described in the specific embodiment;

[0017] Figure 4 This is a schematic diagram of the specific structure of the driving component described in the specific implementation method;

[0018] Figure 5 This is a schematic diagram of the specific structure of the lifting beam described in the specific implementation method;

[0019] Figures 1-5 In the middle: 1. Base plate; 2. Lifting beam; 3. Locking pin; 4. Driving component; 5. Lock hole; 6. Through hole; 7. Slot; 8. Spring; 9. Blocking component; 10. Slot; 11. Pressure inclined surface; 12. Pressing surface; 13. Slide groove; 14. Paddle; 15. Through hole; 16. Protrusion; 17. Rectangular cube; 18. Adjustment window; 19. Blind hole; 20. Guide bar; 21. Guide groove; 22. Raised bar. Detailed Implementation

[0020] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-5 The illustrated lifting adjustment mechanism for the backrest includes a base plate 1 and two vertically arranged lifting beams 2. Each lifting beam 2 is slidably connected to the base plate 1. Each lifting beam 2 is provided with a locking pin 3 for locking itself and a driving component 4 for unlocking the locking pin 3. Figure 2 As shown, the base plate 1 has multiple longitudinally arranged locking holes 5 that cooperate with the locking pin 3. The base plate 1 also has through holes 6 opposite to the driving member 4. The driving member 4 is inserted into the through holes 6 and can slide up and down along the lifting beam 2. When the locking pin 3 is inserted into the corresponding locking hole 5, the corresponding lifting beam 2 and base plate 1 are locked in place. 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 disengage the locking pin 3 from the locking hole 5. Then, the user moves the lifting beam 2 up and down to the appropriate position and resets the locking pin 3, inserting it into the locking hole 5 at that height position, thus maintaining a constant height of the lifting beam 2. This provides the user with more operating space and makes operation more convenient.

[0022] like Figure 3 As shown, any of the lifting beams 2 is provided with a groove 7 for embedding a locking pin 3. The locking pin 3 is inserted into the groove 7. A spring 8 is also provided between the bottom surface of the 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 lock hole 5. The lower part of the locking pin 3 expands and is blocked by the blocking member 9 to prevent it from falling out of the groove 7. A radially extending slot 10 is opened on one side of the locking pin 3. The inner wall of the slot 10 away from the base plate 1 is an outwardly inclined pressure slope 11. The driving member 4 is a slider that is slidably connected to the lifting beam 2 on one side of the locking pin 3. One end of the driving member 4 is opposite to the slot 10 and is provided with a pressing surface 12 that cooperates with the pressure slope 11. Figure 4As shown, the pressing surface 12 is also inclined. The sliding direction of the driving member 4 is directly opposite the slot 10. When the pressing surface 12 of the driving member 4 is inserted into the slot 10, the pressing surface 12 presses against the pressure-bearing inclined surface 11 of the slot 10 and pushes the locking pin 3 towards the bottom of the groove 7, causing the head of the locking pin 3 to retract and separate from the corresponding lock hole 5 to achieve unlocking. After the driving member 4 is released, both the locking pin 3 and the driving member 4 are reset under the elastic force of the spring 8. The cooperation structure between the driving member 4 and the locking pin 3 used in this embodiment can realize the automatic reset and locking of the locking pin 3, improving the locking reliability of the locking pin 3 on the lifting beam 2.

[0023] In this embodiment, the lifting beam 2 has a sliding groove 13 that communicates with the recessed groove 7. The driving component 4 is slidably embedded in the sliding groove 13. The driving component 4 has a lever 14 that extends out of the sliding groove 13 and towards the base plate 1. The blocking component 9 is a cover plate that covers the lifting beam 2, covering the recessed groove 7 and the sliding groove 13. The blocking component 9 has a through hole 15 for the head of the locking pin 3 and the lever 14 to extend out. Connecting the sliding groove 13 with the recessed groove 7 can improve the fitting accuracy between the driving component 4 and the locking pin 3, ensuring that the driving component 4 is accurately inserted into the slot 10 of the locking pin 3. At the same time, using the blocking component 9 to cover the locking pin 3 and the driving component 4 together can effectively improve the integrity of the locking pin 3, the driving component 4 and the lifting beam 2, and improve the ease of assembly between the lifting beam 2 and the base plate 1.

[0024] In this embodiment, two locking pins 3 and two driving components 4 are symmetrically arranged on each of the lifting beams 2. The two locking pins 3 are located between the two driving components 4, and the distance between the two driving components 4 is sufficient for the user to pinch with one hand using their thumb and forefinger. This layout makes operation more convenient for the user, and the adjustment of the lifting beam 2 can be completed with one hand.

[0025] The lower enlarged portion of the locking pin 3 is a rectangular cube 17. One face of the rectangular cube 17 faces the driving component 4 and has a slot 10. The groove 7 is adapted to the rectangular cube 17. The rectangular cube 17 can effectively prevent the locking pin from rotating, and the matching groove 7 ensures that the slot 10 is directly facing the driving component 4.

[0026] Although this embodiment uses two lifting beams 2 as an example, in actual applications, the number of lifting beams 2 can be increased or decreased according to different needs such as the number of backrests and support strength.

[0027] In this embodiment, the substrate 1 has elongated blind holes 19 corresponding to the locking pins 3 one by one. The major axis of the blind holes 19 is parallel to the lifting direction of the lifting beam 2. Multiple locking holes 5 are discretely arranged along the major axis of the blind holes 19 on the inner bottom surface of the blind holes 19. Guide strips 20 extending outward in the left and right directions are respectively provided at the left and right ends of any lifting beam 2. Guide grooves 21 are respectively provided on both sides of the side of the substrate 1 facing the lifting beam 2, which are slidably adapted to the guide strips 20 on both sides of 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 to easily realize the sliding connection between the lifting beam 2 and the substrate 1. The extension direction of the guide grooves 21 is parallel to the major axis of the blind holes 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 depths of the locking pin 3 inserted into the locking hole 5 and the blind hole 19. This ensures that when the locking pin 3 is driven by the driving component 4 and disengages from the locking hole 5, it will not disengage from the blind hole 19, thereby using the blind hole 19 to limit the lifting range of the lifting beam 2.

[0028] In this embodiment, the guide groove 21 is formed on the facing surfaces of the protrusions 22 on both sides of the substrate 1. In this way, the protrusions 22 can restrict the lifting beam 2 from detaching from the substrate 1 through the guide bar 20. At the same time, when the lifting beam 2 moves up and down within the long diameter range of the blind hole 19, the guide bar 20 always remains within the guide groove 21. This structure maintains the stability of the sliding connection between the lifting beam 2 and the substrate.

[0029] In this embodiment, a protrusion 16 is further provided on the side of the lifting beam 2 facing away from the base plate 1, and the groove 7 extends into the protrusion 16. The protrusion 16 can be used to limit the deformation of the backrest connected to the lifting beam, so as to prevent the backrest from being excessively deformed and damaged.

[0030] An adjustment window 18 is provided on the side of the protrusion 16, which faces the spring 8. The user can press the spring through the adjustment window to further retract the locking pin 3 and disengage it from the blind hole 19, thereby disassembling the lifting beam 2. Therefore, the spring 8 is preferably fixedly connected to the locking pin 3, and when the locking pin is fully extended, the distance between the locking pin 3 and the bottom surface of the groove 7 is greater than the sum of the actual insertion depths of the locking pin 3 into the blind hole 19 and the lock hole 5.

[0031] The working process of this utility model is as follows: Figure 1 As shown, when the user installs the lifting beam 2, the locking pin 3 can be pressed into the groove 7 using the base plate 1. Then, the guide strips 20 at both ends of the lifting beam 2 can be slid into the guide groove 21. After the guide strips 20 are inserted into the guide groove 21, the lifting beam 2 is restricted by the protrusion 22 and will not detach from the base plate 1 in the opposite direction. 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, which restricts the lifting beam 2 from sliding out of the guide groove 21 in the vertical direction. This achieves a reliable sliding connection between the lifting beam 2 and the base plate.

[0032] After the locking pin 3 is inserted into the groove 7, it will further insert into a certain lock 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, he / she pinches the two levers 14 of the driving member 4 on the lifting beam 2 simultaneously with his / her thumb and forefinger from the back of the base plate 1. The driving member 4 is driven by the levers 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 pressure inclined surface 11 of the locking pin 3, thereby driving the locking pin 3 to move towards the bottom of the groove 7. The locking pin is then removed from the lock hole 5. The user pinches the two levers 14 and moves them up or down at the same time to raise or lower the lifting beam 2. After the lifting beam 2 is moved to the appropriate height, the user releases the two levers 14 and moves the lifting beam 2 up or down again to insert the locking pin 3 into the lock hole 5.

[0033] When it is necessary to remove the lifting beam, the user uses a tool to compress the spring 8 through the adjustment window 18 on the protrusion 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 guide groove 21, thus completing the disassembly.

[0034] The lifting and adjusting mechanism for backrests described in this utility model is easy to adjust, reliably assembled, and stable in use. It effectively solves the technical problem of inconvenient operation of traditional adjustment mechanisms and has good market prospects.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A lifting adjustment mechanism for a backrest, characterized in that The utility model relates to a lifting beam device, including base plate (1) and at least one up and down arranged lifting beam (2), each lifting beam (2) is connected on base plate (1) up and down slidingly, each lifting beam (2) is provided with the locking pin (3) for locking itself respectively, the driving part (4) for driving locking pin (3) to be unlocked, the base plate (1) is provided with multiple longitudinal arranged lock hole (5) with locking pin (3) cooperation on, the base plate (1) is also provided with the through -hole (6) opposite driving part (4), driving part (4) is inserted in through -hole (6) and can follow the up and down sliding of through -hole (6) with lifting beam (2), when locking pin (3) is inserted into corresponding lock hole (5), then corresponding lifting beam (2) and the position of base plate (1) keep locking.

2. The lifting adjustment mechanism for a backrest according to claim 1, characterized in that Any one lifting beam (2) is provided with the embedding groove (7) for embedding locking pin (3), locking pin (3) is inserted into embedding groove (7), embedding groove (7) bottom surface and locking pin (3) bottom end between are also provided with spring (8), the elastic force of spring (8) drives the front end of locking pin (3) to insert lock hole (5), locking pin (3) lower part is enlarged and is blocked by blocking piece (9) to avoid disengaging embedding groove (7), locking pin (3) one side is provided with the radially extending insertion slot (10), the inner wall of insertion slot (10) far away from base plate (1) one side is the outwardly inclined pressure inclined surface (11), the driving part (4) is a slider, slidingly connects on the lifting beam (2) of locking pin (3) one side, one end of driving part (4) is opposite insertion slot (10) and is provided with the pressure contact surface (12) with pressure inclined surface (11) cooperation, pressure contact surface (12) is also inclined setting, the sliding direction of driving part (4) is opposite insertion slot (10), when the pressure contact surface (12) of driving part (4) is inserted into insertion slot (10), pressure contact surface (12) pressure contact insertion slot (10) pressure inclined surface (11) and extrude locking pin (3) to the bottom of embedding groove (7), make locking pin (3) head retract, separate with corresponding lock hole (5) and realize unlocking, after releasing driving part (4), locking pin (3) and driving part (4) are reset under the elastic force of spring (8).

3. The lifting adjustment mechanism for a backrest according to claim 2, characterized in that The lifting beam (2) is provided with the sliding slot (13) that communicates with the embedding groove (7), and the driving part (4) is slidingly embedded in the sliding slot (13). The driving part (4) has a tab (14) extending out of the sliding slot (13) and extending towards the base plate (1). The blocking piece (9) is a cover plate, which covers the embedding groove (7) and the sliding slot (13) on the lifting beam (2). The blocking piece (9) is provided with a through hole (15) for the head of the locking pin (3) and the tab (14) to extend out.

4. The lifting adjustment mechanism for a backrest according to claim 2, characterized in that, The substrate (1) is provided with a long strip-shaped blind hole (19) corresponding to the locking pin (3), the long diameter of the blind hole (19) is parallel to the lifting direction of the lifting beam (2), the inner bottom surface of the blind hole (19) is provided with a plurality of locking holes (5) arranged discretely along the long diameter direction of the blind hole (19), the left and right ends of any lifting beam (2) are respectively provided with a guide strip (20) extending outward to the left and right directions, the two sides of the surface of the substrate (1) facing the lifting beam (2) are respectively provided with a guide groove (21) slidingly matched with the guide strips (20) on the two sides of the lifting beam (2), the guide strips (20) at the two ends of the lifting beam (2) are slidingly inserted into the guide grooves (21) one by one, and slide up and down along the guide grooves (21); the extension direction of the guide groove (21) is parallel to the long diameter direction of the blind hole (19), and the maximum distance of the driving member (4) driving 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 adjustment mechanism for a backrest according to claim 4, characterized in that The lifting beam (2) is provided with two locking pins (3) and two driving members (4) symmetrically arranged on the left and right sides, the two locking pins (3) are located between the two driving members (4), and the distance between the two driving members (4) meets the requirement that a user can pinch them with the thumb and the index finger of one hand.

6. The lift adjustment mechanism for a backrest according to claim 4, characterized in that, The surface of the lifting beam (2) opposite to the substrate (1) is provided with a protrusion (16), the embedded groove (7) extends into the protrusion (16), the protrusion (16) is provided with an adjusting window (18) on the side surface, and the adjusting window (18) faces the spring (8).

7. The lift adjustment mechanism for a backrest according to claim 2, characterized in that, The lower part of the locking pin (3) is a rectangular block (17), one surface of the rectangular block (17) faces the driving member (4) and is provided with a slot (10), and the embedded groove (7) is matched with the rectangular block (17).

8. The lift adjustment mechanism for a backrest according to claim 1, characterized in that, The lifting beam (2) has two.

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