Sliding block type locking structure for headrest

Abstract

The utility model relates to the technical field of medical equipment, in particular to a sliding block type locking structure for a headrest, which comprises a pressing cover, the pressing cover is connected in a sliding groove at the top end of a side cover in a sliding mode, a limiting piece is arranged on the pressing cover to prevent the limiting piece from being separated from the sliding groove, the bottom end of the side cover is connected with the top end of a handle, and a locking piece is arranged in the handle. One end of the locking piece is connected with the headrest, the other end of the locking piece is connected with the chair, the locking piece is in friction fit with the inverted triangular ejector block, the inverted triangular ejector block is installed at the bottom end of the pressing cover, the inverted triangular ejector block is arranged at the bottom end of the pressing cover, the inverted triangular ejector block is in friction fit with the locking piece, and therefore the headrest and the chair are unlocked, and the structure of the device is simplified; and the space of the device is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a slider type locking structure for a headrest. Background Art

[0002] The headrest locking mechanism is a part of the seat that prevents relative displacement between the seat and the headrest, and provides a mechanism for unlocking and adjusting the headrest when the position of the headrest needs to be adjusted, thereby improving the comfort of the patient during the examination.

[0003] However, the prior art still has shortcomings. For example, a dental chair headrest positioning and locking mechanism with announcement number: CN201720977027.5 includes a support and a baffle. Baffles are provided on the left and right sides of the upper surface of the support, and bearings are provided inside the baffles. A metal sheet is provided at the lower end of the connecting rod, and a rubber pad is provided on the upper surface of the metal sheet. A gasket is provided at the top of the connecting rod, and a first spring is provided on the lower surface of the gasket. The lower end of the first spring is connected to the upper surface of the pad, and a top plate is provided at the upper end of the support rod. When examining and treating young patients, the adjustment and operation methods of the device are still too complicated. Utility Model Content

[0004] The utility model aims to provide a slider type locking structure for a headrest to solve the problem raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a slider type locking structure for a headrest, comprising: a pressing cover, a side cover, a limit piece, a handle, an inverted triangular top block and a locking piece, wherein the pressing cover is slidably connected in a slide groove at the top end of the side cover, a limit piece is installed on the pressing cover to prevent the limit piece from escaping from the slide groove, the bottom end of the side cover is connected to the top end of the handle, a locking piece is installed in the handle, one end of the locking piece is connected to the headrest, and the other end of the locking piece is connected to the chair, the locking piece is frictionally matched with the inverted triangular top block, and the inverted triangular top block is installed at the bottom end of the pressing cover.

[0006] Preferably, the locking member comprises: a rotating shaft, a U-shaped slide and a locking mechanism, a rotating shaft is installed at each end of the bottom wall of the handle, the rotating shaft is slidably connected to the inner wall of the U-shaped slide, the side wall of the U-shaped slide is slidably connected to the inner wall of the handle, the guide block at the end of the U-shaped slide is provided with a chamfer, the chamfer is frictionally matched with the side wall of the inverted triangle top block, the locking mechanism is installed on the rotating shaft, and the bottom end of the locking mechanism is frictionally matched with the top end of the U-shaped slide.

[0007] Preferably, the locking mechanism includes: a sliding gear and a positioning piece, the top of the U-shaped slide is provided with a slope, the slope is arranged toward the side wall of the inverted triangle top block, a sliding gear is mounted on the rotating shaft, a second slope is provided at the bottom end of the sliding gear, the second slope is frictionally matched with the slope, and the top of the sliding gear is plug-fitted with the positioning piece.

[0008] Preferably, the positioning member includes: a fixed ring and an insert block, a plurality of insert blocks are provided at the top of the sliding gear, the insert blocks are plugged into slots, the slots are provided at the bottom end of the fixed ring, the inner wall of the fixed ring is connected to the side wall of the rotating shaft, one fixed ring is connected to the headrest, and the other fixed ring is connected to the chair.

[0009] Preferably, the positioning member further comprises: a separation compression spring, the rotating shaft and the separation compression spring are arranged concentrically, the top end of the separation compression spring is installed in the annular groove at the bottom end of the fixing ring, and the bottom end of the separation compression spring is connected to the second annular groove on the top surface of the sliding gear.

[0010] Preferably, the side wall of the sliding gear is in contact with and fits with the end of the base compression spring, and the other end of the base compression spring is mounted on the side wall of the guide block.

[0011] Preferably, the other side wall of the sliding gear is provided with a plurality of longitudinal slide bars, and the longitudinal slide bars are slidably connected to the longitudinal slide grooves on the inner wall of the handle.

[0012] Preferably, the bottom wall of the handle is provided with a base friction plate, the base friction plate is sleeved on the rotating shaft, and the top end of the base friction plate is frictionally matched with the bottom end of the U-shaped slide seat.

[0013] Preferably, the limiting member comprises: a stopper and a limiting groove, the side wall of the pressing cover is provided with a plurality of stoppers, the stoppers are slidably connected to the limiting grooves, and the limiting grooves are provided on the inner wall of the sliding groove.

[0014] Preferably, an oil storage port is provided on the base friction plate, and the top end of the oil storage port is arranged toward the bottom end of the U-shaped slide seat.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. By arranging an inverted triangular top block at the bottom end of the pressing cover, the inverted triangular top block and the locking piece are frictionally matched to unlock the headrest and the chair, thereby simplifying the structure of the device and saving the space of the device;

[0017] 2. By setting one end of the locking piece to be connected to the headrest and the other end to be connected to the chair, the efficiency of adjusting the position of the headrest is accelerated;

[0018] 3. By using the locking piece to cooperate with the inverted triangle top block, the position of the headrest can be changed in time to adapt to the height differences between infants, disabled patients and adult patients, thereby increasing the adaptability and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the main structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 A partial enlarged view of the middle A;

[0021] Figure 3 This is a schematic diagram of the fixing ring structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the installation position of the stopper of the utility model;

[0023] Figure 5 It is a cross-sectional view of the rotating shaft of the utility model;

[0024] Figure 6 For this utility model Figure 5 A partial enlarged view of point B in the middle.

[0025] In the figure: pressing cover 1, side cover 2, limiting member 3, handle 4, inverted triangle top block 5, locking member 6, rotating shaft 7, U-shaped slide 8, locking mechanism 9, sliding gear 10, positioning member 11, fixing ring 12, insert block 13, separation compression spring 14, base compression spring 15, longitudinal slide bar 16, base friction plate 17, stopper 18, limiting groove 19, oil storage port 20, push shaft 21, positioning block 22, guide block 23. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example: Reference Figure 1-Figure 6 A slider type locking structure for a headrest, comprising: a pressing cover 1, a side cover 2, a limiting member 3, a handle 4, an inverted triangular top block 5 and a locking member 6. The pressing cover 1 is slidably connected in a slide groove at the top end of the side cover 2. The pressing cover 1 is provided with a limiting member 3 to prevent the limiting member 3 from escaping from the slide groove. The bottom end of the side cover 2 is connected to the top end of the handle 4. The handle 4 is provided with a locking member 6. One end of the locking member 6 is connected to the headrest, and the other end of the locking member 6 is connected to the chair. The locking member 6 is frictionally matched with the inverted triangular top block 5, and the inverted triangular top block 5 is installed at the bottom end of the pressing cover 1.

[0029] The principles and beneficial effects of the above scheme are:

[0030] When it is necessary to examine and treat the child patient, the pressing cover 1 is pressed downward, and the pressing cover 1 moves downward along the slide groove in the side cover 2, and the inverted triangular top block 5 connected to the bottom end of the pressing cover 1 unlocks the locking piece 6 in the handle 4, and the operator turns the handle 4 downward to adjust the headrest to the upper middle position of the chair back; the pressing of the pressing cover 1 is stopped, the pressing cover 1 is reset, and the locking piece 6 locks the headrest and the chair again; by arranging the inverted triangular top block 5 at the bottom end of the pressing cover 1, the inverted triangular top block 5 and the locking piece 6 are frictionally matched to unlock the headrest and the chair, the structure of the device is simplified and the space of the device is saved; by arranging one end of the locking piece 6 to be connected to the headrest and the other end to be connected to the chair, the efficiency of adjusting the position of the headrest is accelerated; by using the locking piece 6 to work in conjunction with the inverted triangular top block 5, the position of the headrest can be changed in time to adapt to the height difference between children and disabled patients and adult patients, thereby increasing the adaptability and practicality of the device.

[0031] The locking member 6 includes: a rotating shaft 7, a U-shaped slide 8 and a locking mechanism 9. A rotating shaft 7 is installed at each end of the bottom wall of the handle 4. The rotating shaft 7 is slidably connected to the inner wall of the U-shaped slide 8. The side wall of the U-shaped slide 8 is slidably connected to the inner wall of the handle 4. The guide block at the end of the U-shaped slide 8 is provided with a chamfer, and the chamfer is frictionally matched with the side wall of the inverted triangle top block 5. The locking mechanism 9 is installed on the rotating shaft 7, and the bottom end of the locking mechanism 9 is frictionally matched with the top end of the U-shaped slide 8.

[0032] The principles and beneficial effects of the above scheme are:

[0033] When the inverted triangle top block 5 moves downward, the inverted triangle top block 5 moves downward relative to the chamfer of the guide block, and the two U-shaped slides 8 move in opposite directions, and the U-shaped slides 8 unlock the locking mechanism 9 to release the implementation device;

[0034] When the inverted triangle top block 5 moves upward, the inverted triangle top block 5 moves upward relative to the chamfer of the guide block, and the two U-shaped slides 8 move in opposite directions. The U-shaped slide 8 locks the locking mechanism 9 to reset the implementation device. By setting a rotating shaft 7 connected to the locking mechanism 9, the rotating shaft 7 and the inner wall of the U-shaped slide 8 are frictionally matched, which further saves space in the device; through the friction cooperation between the side wall of the inverted triangle top block 5 and the chamfer of the guide block on the U-shaped slide 8, the top end of the U-shaped slide 8 locks and unlocks the locking mechanism 9, which makes full use of the linkage effect between the components, reduces the rigid connection between the parts, facilitates the disassembly of the device, and at the same time increases the service life of the device.

[0035] The locking mechanism 9 includes: a sliding gear 10 and a positioning piece 11. The top of the U-shaped slide seat 8 is provided with an inclined surface, which is arranged toward the side wall of the inverted triangle top block 5. The sliding gear 10 is mounted on the rotating shaft 7. The bottom end of the sliding gear 10 is provided with a second inclined surface, which is frictionally matched with the inclined surface. The top end of the sliding gear 10 is plug-fitted with the positioning piece 11.

[0036] The principles and beneficial effects of the above scheme are:

[0037] The second inclined surface at the bottom end of the sliding gear 10 is frictionally matched with the inclined surface at the top end of the U-shaped slide 8. When the two U-shaped slides 8 move in opposite directions, the sliding gear 10 moves downward in the handle 4 and breaks away from the contact with the positioning piece 11; when the two U-shaped slides 8 move towards each other, the sliding gear 10 moves upward in the handle 4, and the sliding gear 10 contacts and fits with the positioning piece 11.

[0038] The positioning member 11 includes: a fixed ring 12 and an insert block 13. A plurality of insert blocks 13 are provided at the top of the sliding gear 10. The insert blocks 13 are plugged into and matched with slots. The slots are provided at the bottom of the fixed ring 12. The inner wall of the fixed ring 12 is connected to the side wall of the rotating shaft 7. One fixed ring 12 is connected to the headrest, and the other fixed ring 12 is connected to the chair.

[0039] The principles and beneficial effects of the above scheme are:

[0040] When the sliding gear 10 moves upward, the plug block 13 is plugged into the slot; when the sliding gear 10 moves downward, the plug block 13 ends its plugging and matching with the slot. By arranging the plug block 13 on the sliding gear 10 and plugging and matching with the slot, the use of parts is simplified, and at the same time, the fixing ring 12 is prevented from rotating when the device is locked, thereby improving the stability of the device.

[0041] The positioning member 11 also includes: a separation compression spring 14, the rotating shaft 7 is concentrically arranged with the separation compression spring 14, the top end of the separation compression spring 14 is installed in the annular groove at the bottom end of the fixing ring 12, and the bottom end of the separation compression spring 14 is connected to the second annular groove on the top surface of the sliding gear 10.

[0042] The principles and beneficial effects of the above scheme are:

[0043] The separation compression spring 14 is arranged between the sliding gear 10 and the fixing ring 12. When the sliding gear 10 moves downward, the separation compression spring 14 assists in providing the elastic force for unlocking and prevents the sliding gear 10 from resetting before the headrest position adjustment is completed, thereby improving the rationality of the device.

[0044] The side wall of the sliding gear 10 is in contact with the end of the base compression spring 15, and the other end of the base compression spring 15 is installed on the side wall of the guide block.

[0045] The principles and beneficial effects of the above scheme are:

[0046] When the inverted triangle top block 5 moves downward, the U-shaped slide 8 moves toward the rotating shaft 7, and the base compression spring 15 is compressed. When the inverted triangle top block 5 moves upward, the U-shaped slide 8 moves in the opposite direction of the rotating shaft 7 and resets the U-shaped slide 8 to ensure that the device can work continuously.

[0047] The other side wall of the sliding gear 10 is provided with a plurality of longitudinal slide bars 16 , which are slidably connected with the longitudinal slide grooves on the inner wall of the handle 4 .

[0048] The principles and beneficial effects of the above scheme are:

[0049] When the sliding gear 10 slides up and down in the handle 4, the longitudinal slide bar 16 is slidably connected to the longitudinal slide groove, which provides a longitudinal guide for the movement of the sliding gear 10 to prevent the sliding gear 10 from rotating, ensuring that the plug block 13 and the slot can be plugged in again, while improving the stability of the device when locked.

[0050] The bottom wall of the handle 4 is provided with a base friction plate 17 , which is sleeved on the rotating shaft 7 , and the top end of the base friction plate 17 is frictionally matched with the bottom end of the U-shaped slide seat 8 .

[0051] The principles and beneficial effects of the above scheme are:

[0052] A base friction plate 17 is mounted on the bottom wall of the handle 4 , and the base friction plate 17 prevents the handle 4 from directly rubbing against the U-shaped slide 8 .

[0053] The limiting member 3 includes: a stopper 18 and a limiting groove 19. The side wall of the pressing cover 1 is provided with a plurality of stoppers 18. The stoppers 18 are slidably connected with the limiting grooves 19. The limiting grooves 19 are provided on the inner wall of the sliding groove.

[0054] The principles and beneficial effects of the above scheme are:

[0055] The side wall of the pressing cover 1 is equipped with multiple blocks 18, which are slidably connected to the limiting grooves 19. The limiting grooves 19 are arranged on the inner wall of the slide groove. After the pressing of the pressing cover 1 is completed, the limiting grooves limit the blocks 18 to prevent the pressing cover 1 from escaping from the device.

[0056] The base friction plate 17 is provided with an oil storage port 20 , and the top end of the oil storage port 20 is arranged toward the bottom end of the U-shaped slide seat 8 .

[0057] The principles and beneficial effects of the above scheme are:

[0058] Before assembling the device, the operator can drip lubricating oil into the oil storage port 20 to facilitate lubrication of the U-shaped slide 8 when it moves left and right, thereby increasing the service life of the components.

[0059] The top of the rotating shaft 7 is provided with a through hole, the side wall of the rotating shaft 7 is provided with two positioning grooves, and the side wall of the bottom end of the rotating shaft 7 is provided with two guide grooves. A push shaft 21 is slidably connected in the through hole, and a positioning block 22 is installed at the top of the push shaft 21. The two ends of the positioning block 22 are respectively slidably connected with a positioning groove, and the side wall of the positioning block 22 outside the rotating shaft 7 is provided with an inclined surface, and the top of the inclined surface is arranged close to the side wall of the rotating shaft 7. Elastic grooves are opened between the positioning blocks 22, and the side walls of the positioning blocks 22 are snap-fitted with the inner wall of the fixing ring 12. A return spring is installed at the bottom end of the positioning block 22, and the bottom end of the return spring is connected to the bottom wall of the positioning groove. A guide block 23 is installed in the guide groove, and the two guide blocks 23 are connected by a tension spring. The side wall of the guide block 23 is slidably fitted with the inner wall of the U-shaped slide 8, and the conical bottom end of the push shaft 21 is placed between the two guide blocks 23, and the bottom end of the guide block 23 contacts and fits with the top surface of the base friction plate 17.

[0060] The principles and beneficial effects of the above scheme are:

[0061] When installing the fixing ring 12 on the rotating shaft 7, the fixing ring 12 is clamped on the positioning block 22, and the fixing ring 12 is continued to be installed downward. The fixing ring 12 drives the push shaft 21 to move downward. When the conical bottom end side wall of the push shaft 21 is clamped with the inner walls of the two guide blocks 23, the tension spring is stretched and the return spring is compressed. Since the conical bottom end side wall of the push shaft 21 is clamped with the inner walls of the two guide blocks 23, the position of the push shaft 21 in the rotating shaft 7 is fixed. At the same time, the guide block 23 extends out of the rotating shaft 7, and the bottom surface of the guide block 23 contacts and cooperates with the top surface of the base friction plate 17, thereby improving the stability of the base friction plate 17 after installation; at the same time, by setting the push shaft 21, the positioning block 22, the guide block 23, the tension spring and the return spring, it is convenient to quickly disassemble and assemble the fixing ring 12.

[0062] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A slider type locking structure for a headrest, characterized in that: include: A pressing cover (1) is slidably connected in a slide groove at the top end of the side cover (2). A limiting member (3) is installed on the pressing cover (1) to prevent the limiting member (3) from escaping from the slide groove. The bottom end of the side cover (2) is connected to the top end of the handle (4). A locking member (6) is installed in the handle (4). One end of the locking member (6) is connected to the headrest, and the other end of the locking member (6) is connected to the chair. The locking member (6) is frictionally matched with an inverted triangular top block (5). The inverted triangular top block (5) is installed at the bottom end of the pressing cover (1).

2. The slider type locking structure for a headrest according to claim 1, characterized in that: The locking member (6) comprises a rotating shaft (7), one rotating shaft (7) is respectively mounted on the two ends of the bottom wall of the handle (4), the rotating shaft (7) is slidably connected to the inner wall of the U-shaped slide seat (8), the side wall of the U-shaped slide seat (8) is slidably connected to the inner wall of the handle (4), the guide block at the end of the U-shaped slide seat (8) is provided with a chamfer, the chamfer is frictionally matched with the side wall of the inverted triangle top block (5), a locking mechanism (9) is mounted on the rotating shaft (7), and the bottom end of the locking mechanism (9) is frictionally matched with the top end of the U-shaped slide seat (8).

3. The slider type locking structure for a headrest according to claim 2, characterized in that: The locking mechanism (9) comprises: a sliding gear (10) and a positioning member (11); a top end of the U-shaped sliding seat (8) is provided with an inclined surface, the inclined surface is arranged toward the side wall of the inverted triangular top block (5); the sliding gear (10) is sleeved on the rotating shaft (7); a second inclined surface is provided at the bottom end of the sliding gear (10); the second inclined surface is frictionally matched with the inclined surface; and the top end of the sliding gear (10) is plug-fitted with the positioning member (11).

4. The slider type locking structure for a headrest according to claim 3, characterized in that: The positioning member (11) comprises: a fixing ring (12) and an insert block (13); a plurality of insert blocks (13) are arranged at the top of the sliding gear (10); the insert blocks (13) are plugged into and matched with slots; the slots are arranged at the bottom of the fixing ring (12); the inner wall of the fixing ring (12) is connected to the side wall of the rotating shaft (7); one fixing ring (12) is connected to the headrest; and the other fixing ring (12) is connected to the chair.

5. The slider type locking structure for a headrest according to claim 4, characterized in that: The positioning member (11) further comprises: a separation compression spring (14); the rotating shaft (7) and the separation compression spring (14) are arranged concentrically; the top end of the separation compression spring (14) is installed in the annular groove at the bottom end of the fixing ring (12); and the bottom end of the separation compression spring (14) is connected to the second annular groove on the top surface of the sliding gear (10).

6. The slider type locking structure for a headrest according to claim 5, characterized in that: The side wall of the sliding gear (10) is in contact with the end of the base compression spring (15), and the other end of the base compression spring (15) is mounted on the side wall of the guide block.

7. The slider type locking structure for a headrest according to claim 6, characterized in that: The other side wall of the sliding gear (10) is provided with a plurality of longitudinal slide bars (16), which are slidably connected with the longitudinal slide grooves on the inner wall of the handle (4).

8. The slider type locking structure for a headrest according to claim 7, characterized in that: The bottom wall of the handle (4) is provided with a base friction plate (17), which is sleeved on the rotating shaft (7), and the top end of the base friction plate (17) is frictionally matched with the bottom end of the U-shaped sliding seat (8).

9. The slider type locking structure for a headrest according to claim 1, characterized in that: The limiting member (3) comprises a stopper (18) and a limit groove (19); a plurality of stoppers (18) are mounted on the side wall of the pressing cover (1); the stoppers (18) are slidably connected to the limit grooves (19); and the limit grooves (19) are arranged on the inner wall of the slide groove.

10. The slider type locking structure for a headrest according to claim 8, characterized in that: The base friction plate (17) is provided with an oil storage port (20), and the top end of the oil storage port (20) is arranged toward the bottom end of the U-shaped slide seat (8).

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