Dental chair with backrest limiting protection and seat cushion linkage

Abstract

The utility model provides a dental chair with backrest limiting protection and seat cushion linkage, and belongs to the technical field of medical instruments. The back face of the backrest assembly is rotationally connected with the bent plate, the backrest assembly and the bent plate are connected through an elastic limiting assembly so that the backrest assembly can elastically rotate by a small angle, a detection assembly is fixed to the bent plate, and a detection point of the detection assembly makes contact with the backrest assembly. When the backrest performs pitching motion along with the bent plate, once the backrest is subjected to resistance, the backrest has a slight rotation angle, and then the detection assembly behind the backrest is triggered, so that the dental chair stops moving and is far away from an obstacle, and the safety of a patient and medical personnel is effectively protected. The bending plate is connected with the seat frame through the linkage mechanism and drives the seat frame to move, the optimal comfort experience can be provided for a patient, muscle fatigue of the patient during long-time treatment is relieved, and the comfort during diagnosis and treatment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a dental chair with backrest limit protection and seat cushion linkage. Background Art

[0002] With the advancement of dental equipment technology, the safety and comfort of doctors and patients during dental treatment are receiving increasing attention. When patients are lying on a dental chair for treatment, they are increasingly concerned about the anti-collision function of the dental chair backrest during operation and the linkage of the seat cushion during movement. Current dental chairs have backrests that pitch and fall. When there is an obstacle behind the backrest, the equipment cannot stop movement in time and cannot keep the backrest away from the obstacle, thus failing to effectively protect the safety of patients and medical staff and causing damage to the equipment. Furthermore, the seat cushion of current dental chairs cannot move in conjunction with the backrest during pitch and fall motion, thus failing to provide optimal comfort for patients. Long-term treatment can easily cause muscle fatigue in patients, reducing comfort during diagnosis and treatment. Therefore, it is particularly necessary to design a dental chair with backrest limit protection and seat cushion linkage. Utility Model Content

[0003] The technical problem solved by the present invention is to provide a dental chair with backrest limit protection and seat cushion linkage. The purpose of the present invention is to improve the pitching movement of the dental chair during use, the control when the back of the backrest encounters obstacles, and the linkage of the seat frame during pitching movement, thereby achieving the purpose of protecting the safety of patients and medical staff and improving the comfort during diagnosis and treatment.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by this utility model is:

[0005] A dental chair with backrest limit protection and seat cushion linkage includes a backrest assembly, a curved plate, and a seat frame. The back of the backrest assembly is rotatably connected to the curved plate. The backrest assembly and the curved plate are connected via an elastic limit assembly and a rotating shaft pin, allowing the backrest assembly to produce a small angle of elastic rotation. A detection assembly is fixed to the curved plate, and the detection point of the detection assembly contacts the backrest assembly.

[0006] Guide rails are fixed on the side panels on both sides of the dental chair base frame, and the bent plate is slidably connected to the track in the guide rail. The bent plate is driven to slide by a motor fixed to the dental chair base frame; the seat frame is hinged to the side panels, and the bent plate is connected to the seat frame through a linkage mechanism and drives the seat frame to move.

[0007] Among them, the backrest assembly includes a backrest and a backrest plate, the backrest plate is fixedly connected to the middle position of the back of the backrest, and the two sides of the lower part of the backrest plate are connected to the bent plate through a rotating shaft pin, and the rotating shaft pin passes through the backrest plate and is screwed and fixed with the bent plate to enable the backrest plate to rotate around the central axis.

[0008] Furthermore, the elastic limiting assembly includes a backrest fixing screw and a spring. The backrest fixing screw passes through the spring and the bent plate and is screwed and fixedly connected to the backrest plate. The backrest fixing screw limits the rotation of the backrest assembly and allows it to rotate only at a small angle. The spring has a damping effect on the rotation of the backrest assembly.

[0009] Furthermore, the detection assembly includes a micro switch and a pitch safety bracket, the pitch safety bracket is fixed on the bent plate, the micro switch is fixed on the pitch safety bracket, and the roller on the micro switch contacts the lower surface of the backrest board.

[0010] Among them, the linkage mechanism includes a connecting rod B, a connecting rod C, and a fixed shaft. One end of the connecting rod B is hinged to the end of the bent plate, and the other end is hinged to the connecting rod C. The other end of the connecting rod C is hinged to the seat frame. The hole in the middle of the connecting rod C is passed through the fixed shaft, and the two ends of the fixed shaft are fixedly connected to the guide rail.

[0011] Furthermore, both sides of the seat frame are connected to the side panels on both sides through a connecting rod A, one end of the connecting rod A is hinged to the side panel, and the other end is hinged to the end of the seat frame.

[0012] The advantages of this utility model compared with the prior art are:

[0013] 1. This solution adds a small-angle rotation function at the connection between the bending plate and the backrest, and adds limit protection to the bending plate. When the backrest encounters resistance during pitching motion with the bending plate, it will rotate slightly, triggering the microswitch on the backrest to change its state. Upon receiving the signal of the microswitch state change, the control program will control the dental chair to stop and move away from obstacles, effectively protecting the safety of patients and medical staff, while also ensuring the safety of the equipment.

[0014] 2. This solution designs a linkage mechanism between the curved plate and the seat frame, so that the seat cushion and the backrest are linked during pitching movement, which can provide patients with the best comfort experience in different treatment positions, relieve patients' muscle fatigue during long-term treatment, and improve the comfort experience during diagnosis and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the connection structure between the backrest assembly and the bent plate in the utility model;

[0016] Figure 2 It is a structural schematic diagram of the linkage mechanism between the bending plate and the seat frame in the utility model. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0019] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0020] See also Figure 1-2 , describe the embodiments of the present utility model in detail.

[0021] Example: Dental chair with backrest limit protection and seat cushion linkage:

[0022] In this embodiment, refer to Figure 1 As shown, it includes a backrest assembly 1, a bent plate 2 and a seat frame 9. The back of the backrest assembly 1 is rotatably connected to the bent plate 2. The backrest assembly 1 and the bent plate 2 are connected by an elastic limiting assembly 4 and a rotating shaft pin 3 so that the backrest assembly 1 can produce a small angle elastic rotation. A detection assembly 5 is fixed on the bent plate 2, and the detection point of the detection assembly 5 is in contact with the backrest assembly 1.

[0023] Specifically, the backrest assembly 1 includes a backrest 1-1 and a backrest plate 1-2. The backrest plate 1-2 is fixedly connected to the middle position of the back of the backrest 1-1. The lower two sides of the backrest plate 1-2 are connected to the bent plate 2 through a rotating shaft pin 3. The rotating shaft pin 3 passes through the backrest plate 1-2 and is screwed and fixed to the bent plate 2 so that the backrest plate 1-2 can rotate around the center axis.

[0024] Specifically, the elastic limiting assembly 4 includes a backrest fixing screw 4-1 and a spring 4-2. The backrest fixing screw 4-1 passes through the spring 4-2 and the bent plate 2 and is screwed and fixedly connected to the backrest plate 1-2. The backrest fixing screw 4-1 limits the rotation of the backrest assembly 1 so that it can only rotate at a small angle. The spring 4-2 has a damping effect on the rotation of the backrest assembly 1.

[0025] Specifically, the detection component 5 includes a micro switch 5-1 and a pitch safety bracket 5-2, the pitch safety bracket 5-2 is fixed on the bending plate 2, the micro switch 5-1 is fixed on the pitch safety bracket 5-2, the roller on the micro switch 5-1 is in contact with the lower surface of the backrest plate 1-2, and the micro switch 5-1 is connected to the dental chair control system.

[0026] The connection structure between the backrest and the bent plate mentioned above is such that when the backrest 1-1 moves downward with the bent plate 2, if the back of the backrest 1-1 is subjected to an external force, the backrest 1-1 and the backrest plate 1-2 will rotate at a small angle around the rotating shaft pin 3, thereby causing the lower surface of the backrest plate 1-2 to leave the microswitch 5-1, causing the roller on the microswitch 5-1 to move, triggering the state change of the microswitch 5-1, and the microswitch 5-1 will transmit a signal, causing the control system of the dental chair to control the backrest 1-1 to stop moving, and rise slightly under the action of the backrest fixing screw 4-1 and the spring 4-2, so that the backrest 1-1 is away from the force point, thereby protecting the safety of patients and medical staff, and ensuring the safety of the equipment.

[0027] In this embodiment, refer to Figure 2 As shown, guide rails 8 are fixed on the side panels 7 on both sides of the dental chair base, and the two sides of the bent plate 2 are slidably connected to the tracks in the guide rails 8. The bent plate 2 is driven by a motor 10 fixed to the dental chair base and slides along the tracks in the guide rails 8; the seat frame 9 is hinged to the side panels 7, and the bent plate 2 is connected to the seat frame 9 through a linkage mechanism 11 and drives the seat frame 9 to move.

[0028] Specifically, the linkage mechanism 11 includes a connecting rod B11-1, a connecting rod C11-2, and a fixed shaft 11-3. One end of the connecting rod B11-1 is hinged to the end of the bent plate 2, and the other end is hinged to the connecting rod C11-2. The other end of the connecting rod C11-2 is hinged to the seat frame 9. The hole on the middle part of the connecting rod C11-2 is passed through the fixed shaft 11-3, and both ends of the fixed shaft 11-3 are fixedly connected to the guide rail 8.

[0029] Specifically, both sides of the seat frame 9 are connected to the side panels 7 on both sides through a connecting rod A 9-1. One end of the connecting rod A 9-1 is hinged to the side panel 7, and the other end is hinged to the end of the seat frame 9.

[0030] With this structure, when the dental chair pitches, motor 10 pushes curved plate 2 along the track within guide rail 8. This in turn moves connecting rod C11-2, which in turn rotates around fixed axis 11-3 on guide rail 8, pushing seat frame 9 in concert. As the backrest moves through different treatment positions, the seat frame also synchronizes with the movement, providing optimal patient comfort and alleviating muscle fatigue during prolonged treatments.

[0031] It will be apparent 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 embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0032] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A dental chair with backrest limit protection and seat cushion linkage, comprising a backrest assembly (1), a curved plate (2) and a seat frame (9), wherein the back of the backrest assembly (1) is rotatably connected to the curved plate (2), and is characterized in that: The backrest assembly (1) and the bent plate (2) are connected via an elastic limiting assembly (4) and a rotating shaft pin (3) so that the backrest assembly (1) can produce a small-angle elastic rotation. A detection assembly (5) is fixed on the bent plate (2), and a detection point of the detection assembly (5) is in contact with the backrest assembly (1). Guide rails (8) are fixed on the side panels (7) on both sides of the dental chair base frame, the bent plate (2) is slidably connected to the track inside the guide rails (8), and the bent plate (2) is driven to slide by a motor (10) fixed to the dental chair base frame; the seat frame (9) is hinged to the side panels (7), and the bent plate (2) is connected to the seat frame (9) through a linkage mechanism (11) and drives the seat frame (9) to move.

2. The dental chair with backrest limit protection and seat cushion linkage according to claim 1, characterized in that: The backrest assembly (1) comprises a backrest (1-1) and a backrest plate (1-2), wherein the backrest plate (1-2) is fixedly connected to the middle position of the back of the backrest (1-1), and both sides of the lower part of the backrest plate (1-2) are connected to the bent plate (2) via rotating shaft pins (3), and the rotating shaft pins (3) pass through the backrest plate (1-2) and are screwed and fixed with the bent plate (2) so that the backrest plate (1-2) can rotate around the central axis.

3. The dental chair with backrest limit protection and seat cushion linkage according to claim 2, characterized in that: The elastic limiting assembly (4) comprises a backrest fixing screw (4-1) and a spring (4-2); the backrest fixing screw (4-1) passes through the spring (4-2) and the bent plate (2) and is screwed and fixedly connected to the backrest plate (1-2); the backrest fixing screw (4-1) limits the rotation of the backrest assembly (1) and enables it to rotate only at a small angle; and the spring (4-2) has a damping effect on the rotation of the backrest assembly (1).

4. The dental chair with backrest limit protection and seat cushion linkage according to claim 2, characterized in that: The detection assembly (5) comprises a micro switch (5-1) and a pitch safety bracket (5-2); the pitch safety bracket (5-2) is fixed on the bent plate (2); the micro switch (5-1) is fixed on the pitch safety bracket (5-2); and the roller on the micro switch (5-1) contacts the lower surface of the backrest plate (1-2).

5. The dental chair with backrest limit protection and seat cushion linkage according to claim 1, characterized in that: The linkage mechanism (11) comprises a connecting rod B (11-1), a connecting rod C (11-2), and a fixed shaft (11-3); one end of the connecting rod B (11-1) is hinged to the end of the bent plate (2), and the other end is hinged to the connecting rod C (11-2); the other end of the connecting rod C (11-2) is hinged to the seat frame (9); a hole on the middle part of the connecting rod C (11-2) is passed through the fixed shaft (11-3); and both ends of the fixed shaft (11-3) are fixedly connected to the guide rail (8).

6. The dental chair with backrest limit protection and seat cushion linkage according to claim 1, characterized in that: Both sides of the seat frame (9) are connected to the side panels (7) on both sides through connecting rods A (9-1), one end of the connecting rod A (9-1) is hinged to the side panel (7), and the other end is hinged to the end of the seat frame (9).

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