Double-joint headrest
By using a dual-joint headrest design, and combining a through cavity, a sliding cavity, and a sliding plate, the problems of poor stability and laborious operation of dental reclining chair headrest adjustment are solved. This achieves stable fixation and convenient adjustment of the headrest position, improving the comfort and efficiency of dental treatment.
Patent Information
- Application Number
- CN202520104369.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-16
AI Technical Summary
Existing dental reclining chair headrest adjustment methods are unstable and laborious to operate, affecting the treatment experience and efficiency.
The headrest features a dual-joint design. Through the through-cavity and sliding cavity structure of the mounting block, combined with the cooperation of the sliding plate and screw nut, the insertion plate can be stably fixed and easily adjusted. The headrest position can be adjusted by using the extrusion protrusion and friction.
It achieves stable fixation and convenient adjustment of the headrest position, improving the patient's treatment experience and the doctor's operational precision, while reducing the difficulty of adjustment and maintenance costs.
Smart Images
Figure CN223787843U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of headrest technology, specifically to a double-jointed headrest. Background Technology
[0002] In the field of dental treatment, patients need to remain in a lying position for extended periods during treatment, making the comfort and adjustability of the headrest on the dental recliner crucial. Currently, most dental recliners on the market are equipped with adjustable headrests that typically use inserts and spring clips to achieve positional fixation and adjustment.
[0003] In this traditional structural design, the insert plate, as the key component connecting the headrest and the main body of the recliner, typically slides along a pre-set track to change the position of the headrest relative to the recliner, meeting the different head support needs of various patients. However, the spring plate, as the only element providing compressive force, has many limitations. On the one hand, during long-term use, the spring plate's elasticity is easily diminished due to frequent compression and rebound forces. This causes the compressive force applied by the spring plate to become unstable, resulting in the headrest frequently becoming loose or shifting during use, seriously affecting the patient's treatment experience and potentially interfering with the doctor's operational precision.
[0004] On the other hand, from the perspective of ease of operation, in order to ensure sufficient friction between the insert plate and the spring to fix the headrest position, patients or medical staff need to overcome considerable resistance when adjusting the headrest. This not only requires users to have a certain amount of strength, but also makes it extremely difficult for some people with less strength to adjust the headrest themselves; moreover, in medical scenarios where headrests are frequently adjusted, the strenuous operation will consume a lot of energy for medical staff and reduce work efficiency.
[0005] In conclusion, existing headrest adjustment methods for dental reclining chairs, due to their poor stability and laborious operation, are no longer able to meet the growing needs of dental treatment, and there is an urgent need for a new and more optimized headrest adjustment technology. Utility Model Content
[0006] This invention proposes a double-jointed headrest, which solves the problems of poor stability and laborious operation of headrest adjustment methods in related technologies.
[0007] The technical solution of this utility model is as follows:
[0008] Dual-joint headrest, including:
[0009] Headrest body;
[0010] A mounting block for mounting on a recliner, the mounting block having a through cavity and a sliding cavity, the through cavity and the sliding cavity being arranged sequentially along the height direction of the mounting block, the through cavity communicating with the sliding cavity;
[0011] An insert plate is mounted on the headrest body at one end, and the other end of the insert plate is slidably disposed in the cavity. After the insert plate slides, it is used to adjust the distance between the headrest and the recliner.
[0012] A sliding piece is slidably disposed within the sliding cavity. The sliding piece has a pressing protrusion that extends into the through cavity. After sliding, the pressing protrusion approaches the insert plate and is used to press the insert plate.
[0013] Optionally, the sliding cavity has an opening through which the sliding piece slides into or out of the sliding cavity.
[0014] Optionally, the mounting block further includes a sliding groove communicating with the sliding cavity, and further includes:
[0015] The first screw has one end mounted on the sliding plate and the other end slidably mounted in the groove.
[0016] The nut is snapped into the groove and threaded onto the first screw. When the nut is rotated, the first screw drives the sliding piece to move closer to or away from the insert plate.
[0017] Optionally, the insert plate has a second pivot and further includes:
[0018] A first fixing block is disposed on the headrest and has a first pivot.
[0019] The rotating component has one end rotatably mounted on the first rotating shaft and the other end rotatably mounted on the second rotating shaft. The insert plate is mounted on the headrest via the rotating component and the first fixing block.
[0020] Optionally, the first fixing block has a plurality of first insertion holes, the first insertion holes being eccentrically disposed with respect to the first rotating shaft, and the insertion plate has a plurality of second insertion holes, the second insertion holes being eccentrically disposed with respect to the second rotating shaft, further comprising:
[0021] A sliding plate, one end of which is slidably mounted on the first rotating shaft, and the other end of which is slidably mounted on the second rotating shaft;
[0022] A plurality of snap-fit pins are disposed on the sliding plate. When the sliding plate slides, it causes the snap-fit pins to slide into or out of the first or second socket.
[0023] Optionally, it also includes:
[0024] The first mounting housing has one end rotatably mounted on the first rotating shaft and the other end rotatably mounted on the second rotating shaft;
[0025] The second mounting shell has one end rotatably mounted on the first rotating shaft and the other end rotatably mounted on the second rotating shaft. A receiving space is formed between the first mounting shell and the second mounting shell, and the sliding plate is located within the receiving space.
[0026] Optionally, it also includes:
[0027] A sliding block is slidably disposed on the first mounting shell;
[0028] The guide post has one end mounted on the sliding block and the other end mounted on the sliding plate.
[0029] The elastic element has several parts, one end of which is disposed on the second mounting shell and the other end of which is disposed on the snap-fit post.
[0030] Optionally, it also includes:
[0031] The second fixing block, the first mounting shell and the second mounting shell are located between the second fixing block and the sliding block;
[0032] The second screw has one end threaded onto the second fixing block and the other end extending into the receiving space. After the sliding block slides, it abuts against the other end of the second screw.
[0033] The working principle and beneficial effects of this utility model are as follows:
[0034] In this invention, the mounting block cavity and the sliding cavity are rectangular, arranged vertically along the height of the mounting block and partially connected. The insert plate can slide after being inserted into the cavity. The pressing protrusion on the sliding plate is hemispherical. After the sliding plate slides and approaches the insert plate, the pressing protrusion presses against the insert plate, preventing it from sliding along the cavity and fixing the insert plate in position on the recliner.
[0035] This design features a simple movable insert plate. Simply move the sliding piece away from the insert plate to reduce the friction between the pressing protrusion and the insert plate, making it easy to adjust the position of the headrest and recliner. Attached Figure Description
[0036] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.
[0037] Figure 1 This is a schematic diagram of the structure of this utility model;
[0038] Figure 2 This is a schematic diagram of the mounting block structure of this utility model;
[0039] Figure 3 This is a schematic diagram of the sliding plate structure of this utility model;
[0040] Figure 4 This is a partial cross-sectional view of the present invention;
[0041] Figure 5 This is a schematic diagram of the screw structure of this utility model;
[0042] Figure 6 This is a schematic diagram of the elastic element structure of this utility model;
[0043] Figure 7 This is a partial structural diagram of the sliding plate and mounting block of this utility model.
[0044] Figure 8 This is a schematic diagram of the cooperation structure between the sliding plate and the mounting block of this utility model.
[0045] In the diagram: 1. Mounting block, 11. Through cavity, 12. Sliding cavity, 2. Insert plate, 3. Sliding piece, 31. Extrusion protrusion, 13. Opening, 14. Sliding groove, 4. First screw, 5. Nut, 21. Second rotating shaft, 6. First fixing block, 61. First rotating shaft, 7. Rotating component, 62. First insertion hole, 22. Second insertion hole, 8. Sliding plate, 9. Snap-fit post, 10. First mounting shell, 110. Second mounting shell, 111. Accommodating space, 120. Sliding block, 130. Guide post, 140. Elastic component, 150. Second fixing block, 160. Second screw. Detailed Implementation
[0046] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, they can be understood as further technical solutions without creative effort. In some drawings, components with the same structure or function are only schematically illustrated, or only one is marked. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0047] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0048] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0049] Reference Figures 1-8 This is the first embodiment of the present invention, which proposes a double-jointed headrest, including a headrest body; a mounting block 1 for mounting on a recliner, the mounting block 1 having a through cavity 11 and a sliding cavity 12, the through cavity 11 and the sliding cavity 12 being arranged sequentially along the height direction of the mounting block 1, the through cavity 11 and the sliding cavity 12 being connected; one end of a insert plate 2 being mounted on the headrest body, the other end of the insert plate 2 being slidably mounted in the through cavity 11, the insert plate 2 being used to adjust the distance between the headrest and the recliner after sliding; a sliding piece 3 being slidably mounted in the sliding cavity 12, the sliding piece 3 having a pressing protrusion 31, the pressing protrusion 31 extending into the through cavity 11, the pressing protrusion 31 being used to press the insert plate 2 after sliding and approaching it.
[0050] In this embodiment, the through cavity 11 and the sliding cavity 12 of the mounting block 1 are rectangular, arranged vertically along the height direction of the mounting block 1 and partially connected. The insert plate 2 can slide after being inserted into the through cavity 11. The pressing protrusion 31 on the sliding piece 3 is hemispherical. After the sliding piece 3 slides and approaches the insert plate 2, the pressing protrusion 31 presses the insert plate 2, preventing the insert plate 2 from sliding along the through cavity 11, thus fixing the position of the insert plate 2 on the recliner.
[0051] The movable insert 2 in this design is simple to use; simply move the sliding piece 3 away from the insert 2 to reduce the friction between the pressing protrusion 31 and the insert 2, making it easy to adjust the position of the headrest and recliner. By sliding the insert 2 within the cavity 11, users can easily adjust the distance between the headrest and the recliner to accommodate the neck support needs of users of different heights.
[0052] Furthermore, the sliding cavity 12 has an opening 13, through which the sliding piece 3 slides into or out of the sliding cavity 12.
[0053] In this embodiment, the sliding cavity 12 has a rectangular opening 13 on the side near the insert plate 2. The sliding piece 3 can be inserted into the sliding cavity 12 or slid out of the sliding cavity 12 for disassembly. The sliding piece 3 can move in and out, which facilitates operation, reduces assembly difficulty, and improves production efficiency. During maintenance, workers can quickly remove the sliding piece 3, reducing maintenance time and costs, and improving the economy and maintainability of the product throughout its entire life cycle.
[0054] Furthermore, the mounting block 1 also has a sliding groove 14, which is connected to the sliding cavity 12. One end of the first screw 4 is set on the sliding plate 3, and the other end is slidably set in the sliding groove 14. The nut 5 is snapped in the sliding groove 14 and threaded on the first screw 4. After the nut 5 rotates, it drives the sliding plate 3 to move closer to or away from the insert plate 2 through the first screw 4.
[0055] In this embodiment, the groove 14 on the mounting block 1 is dovetail-shaped and communicates with the sliding cavity 12. One end of the first screw 4 is welded to the sliding plate 3, and the other end extends out of the sliding cavity 12 through the groove 14. The nut 5 and the first screw 4 are threaded together. By rotating the nut 5, the nut 5 is stuck in the groove 14 and cannot slide but can only rotate. The first screw 4 slides relative to the groove 14, thereby driving the first screw 4 to slide. After sliding, the extrusion protrusion 31 on the sliding plate 3 moves closer to or away from the insert plate 2.
[0056] Furthermore, the insert plate 2 has a second rotating shaft 21, and the first fixing block 6 is disposed on the headrest and has a first rotating shaft 61; one end of the rotating member 7 is rotatably disposed on the first rotating shaft 61, and the other end is rotatably disposed on the second rotating shaft 21. The insert plate 2 is disposed on the headrest through the rotating member 7 and the first fixing block 6.
[0057] In this embodiment, the first rotating shaft 61 is fixed to the first fixed block 6. The second rotating shaft 21 on the insert plate 2 is fixed to the insert plate 2. The headrest height can be adjusted by rotating the rotating component 7. The sliding of the sliding plate 3 in the sliding cavity 12 and the action of the pressing protrusion 31 on the insert plate 2, together with the threaded transmission adjustment of the first screw 4 and the nut 5, can realize the adjustment of the headrest position.
[0058] Furthermore, the first fixing block 6 has a plurality of first insertion holes 62, which are eccentrically arranged with the first rotating shaft 61; the insertion plate 2 has a plurality of second insertion holes 22, which are eccentrically arranged with the second rotating shaft 21; one end of the sliding plate 8 is slidably arranged on the first rotating shaft 61, and the other end is slidably arranged on the second rotating shaft 21; there are a plurality of locking pins 9, which are arranged on the sliding plate 8; after the sliding plate 8 slides, it drives the locking pins 9 to slide into or out of the first insertion hole 62 or the second insertion hole 22.
[0059] In this embodiment, the first fixing block 6 has six first insertion holes 62 evenly distributed on a circle centered on the first rotating shaft 61, with the first insertion holes 62 eccentrically positioned relative to the first rotating shaft 61. The insertion plate 2 has six second insertion holes 22 evenly distributed on a circle centered on the second rotating shaft 21, with the second insertion holes 22 eccentrically positioned relative to the second rotating shaft 21. The sliding plate 8 slides on the first rotating shaft 61 and the second rotating shaft 21. The locking pins 9 are cylindrical and fixed to the sliding plate 8. After the sliding plate 8 slides, several locking pins 9 can accurately engage with the corresponding first insertion holes 62 and second insertion holes 22.
[0060] Multiple sets of eccentric first sockets 62 and second sockets 22 enhance the structure, ensuring the headrest position remains fixed after the rotating component 7 rotates, thus supporting the adult's head. The design of the locking post 9 with the first sockets 62 and second sockets 22, along with the auxiliary fixing of the elastic component 140, allows the headrest to be firmly locked after being adjusted to the desired angle. Even when the recliner shakes or the user turns over, the headrest angle remains unchanged, providing continuous and stable support for the user.
[0061] Furthermore, one end of the first mounting shell 10 is rotatably mounted on the first rotating shaft 61, and the other end is rotatably mounted on the second rotating shaft 21; one end of the second mounting shell 110 is rotatably mounted on the first rotating shaft 61, and the other end is rotatably mounted on the second rotating shaft 21. A receiving space 111 is formed between the first mounting shell 10 and the second mounting shell 110, and the sliding plate 8 is located within the receiving space 111. The sliding block 120 is slidably mounted on the first mounting shell 10; one end of the guide post 130 is mounted on the sliding block 120, and the other end is mounted on the sliding plate 8; there are several elastic elements 140, one end of which is mounted on the second mounting shell 110, and the other end is mounted on the snap-fit post 9. The second fixing block 150 is located between the first mounting shell 10 and the second mounting shell 110 and the sliding block 120; one end of the second screw 160 is threaded onto the second fixing block 150, and the other end extends into the receiving space 111. After the sliding block 120 slides, it abuts against the other end of the second screw 160.
[0062] In this embodiment, the receiving space 111 formed after the first mounting shell 10 and the second mounting shell 110 are fastened together has sufficient space reserved inside for the sliding plate 8 and the locking post 9 to move. The sliding block 120 slides in cooperation with the guide rail on the first mounting shell 10. One end of the guide post 130 is riveted to the sliding block 120, and the other end is inserted into the corresponding hole in the sliding plate 8 with clearance fit. Each locking post 9 is fixed with an elastic element 140. One end of the second screw 160 is screwed into the threaded hole of the second fixing block 150, and the other end can contact the sliding block 120 to prevent the sliding range of the sliding block 120 from being too large.
[0063] The first mounting shell 10 and the second mounting shell 110 provide excellent protection for key internal components, preventing corrosion from dust and moisture and extending the service life of the components. In summary, this dual-joint headrest, through its unique structural design, integrates multiple adjustment functions, stability, and durability, providing users with a high-quality reclining chair experience.
[0064] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A dual articulating headrest, characterized by, The utility model relates to a headrest, which comprises: a headrest body; a mounting block (1) arranged on a recliner, the mounting block (1) having a through cavity (11) and a sliding cavity (12), the through cavity (11) and the sliding cavity (12) being arranged in sequence along the height direction of the mounting block (1), the through cavity (11) being in communication with the sliding cavity (12); a plug-in plate (2) arranged at one end on the headrest body, the other end of the plug-in plate (2) being arranged slidingly in the through cavity (11), the plug-in plate (2) being used for adjusting the distance between the headrest and the recliner after sliding; a sliding sheet (3) arranged slidingly in the sliding cavity (12), the sliding sheet (3) having a pressing protrusion (31) extending into the through cavity (11), the pressing protrusion (31) being used for pressing the plug-in plate (2) after being close to the plug-in plate (2) after sliding.
2. The dual articulating headrest of claim 1, wherein, The sliding cavity (12) has an opening (13), and the sliding sheet (3) slides into or out of the sliding cavity (12) through the opening (13).
3. The dual-joint headrest of claim 1, wherein, The mounting block (1) further has a sliding groove (14) in communication with the sliding cavity (12), and the utility model further comprises: a first screw rod (4) arranged at one end on the sliding sheet (3) and at the other end slidingly in the sliding groove (14); a nut (5) arranged in the sliding groove (14) in a clamping manner and arranged in screw threads on the first screw rod (4), the nut (5) being used for driving the sliding sheet (3) to be close to or away from the plug-in plate (2) through the first screw rod (4) after being rotated.
4. The dual-joint headrest of claim 1, wherein, The plug-in plate (2) has a second rotating shaft (21), and the utility model further comprises: a first fixing block (6) arranged on the headrest and having a first rotating shaft (61); a rotating piece (7) arranged at one end on the first rotating shaft (61) and at the other end on the second rotating shaft (21), the plug-in plate (2) being arranged on the headrest through the rotating piece (7) and the first fixing block (6).
5. The dual articulating headrest of claim 4, wherein, The first fixing block (6) has a plurality of first insertion holes (62) arranged eccentrically with the first rotating shaft (61), the plug-in plate (2) has a plurality of second insertion holes (22) arranged eccentrically with the second rotating shaft (21), and the utility model further comprises: a sliding plate (8) arranged at one end slidingly on the first rotating shaft (61) and at the other end slidingly on the second rotating shaft (21); a plurality of clamping columns (9) arranged on the sliding plate (8), the sliding plate (8) being used for driving the clamping columns (9) to slide into or out of the first insertion holes (62) or the second insertion holes (22) after sliding.
6. The dual articulating headrest of claim 5, wherein, The utility model further comprises: a first mounting shell (10) arranged at one end rotatingly on the first rotating shaft (61) and at the other end rotatingly on the second rotating shaft (21); A second mounting shell (110) is rotatably arranged at one end on the first rotating shaft (61) and at the other end on the second rotating shaft (21), and a containing space (111) is formed between the first mounting shell (10) and the second mounting shell (110), and the sliding plate (8) is located in the containing space (111).
7. The dual articulating headrest of claim 6, wherein, Further comprising: A sliding block (120) is slidably arranged on the first mounting shell (10); A guide column (130) is arranged at one end on the sliding block (120) and at the other end on the sliding plate (8); A plurality of elastic members (140) are arranged at one end on the second mounting shell (110) and at the other end on the clamping column (9).
8. The dual articulating headrest of claim 7, wherein, Further comprising: A second fixing block (150) is located between the first mounting shell (10) and the second mounting shell (110) and the sliding block (120); A second screw rod (160) is threadedly arranged at one end on the second fixing block (150) and extends into the containing space (111) at the other end, and the sliding block (120) abuts against the other end of the second screw rod (160) after sliding.