Dental seat backrest device

Abstract

The utility model belongs to the field of dental medical equipment, and discloses a dental seat backrest device which comprises a seat frame, a supporting plate arranged in the seat frame, a driving assembly arranged on the upper portion of the supporting plate, a movable plate arranged in the seat frame in a sliding mode, a movable end of the driving assembly connected with the movable plate, and a backrest assembly arranged on one side of the upper surface of the seat frame. The bottom end of the backrest assembly extends into the chair frame and is connected with the movable plate; supporting modules are arranged at two ends, close to the inner side surface of the chair frame, of the movable plate; when the backrest assembly is adjusted, the backrest assembly can be driven to move through movement of the movable plate so that the backrest assembly can be adjusted, the supporting module can also be synchronously driven to swing, and when the seat backrest is adjusted, the human body pressure borne by the backrest assembly can be transmitted to the supporting module and the driving assembly through the movable plate; therefore, the pressure borne by the driving assembly can be reduced, the service life of the driving assembly can be prolonged, the situation that only a single supporting piece is adopted as a bearing point can be avoided, and the stability of the seat backrest during adjustment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of dental medical equipment, in particular to a dental chair backrest device. Background Art

[0002] When a dental patient undergoes oral treatment or examination, the patient needs to sit on the dental chair or lie on his back on the dental chair to facilitate the doctor's oral examination and treatment. The doctor needs to frequently adjust the height of the patient's head and body, as well as the pitch angle of the head, according to the needs of the examination and treatment, and according to the different heights of the patients, to achieve the optimal height and angle of the oral cavity required for treatment. Therefore, it is necessary to adjust the backrest structure of the chair to allow the patient to be in a more comfortable posture for treatment. For example, Chinese patent CN221534657U discloses a dental chair guide rail pitch and lift control mechanism, which includes a main body component, a dental chair frame, a water tank and a connecting pipe. The water tank is located on one side of the dental chair frame, and the connecting pipe is plugged into one side of the water tank. The adjustment component is arranged on the dental chair frame, and includes an adjustment part, a driving part, and a fixing part. The adjustment part is arranged on the dental chair frame, and the driving part is located on the adjustment part.

[0003] When a patient needs to adjust the seat back while sitting on a dental chair, the above structure mainly uses a cylinder to drive the movable plate to move so as to adjust the seat back. However, this structure only uses the cylinder as a supporting end to support the seat back during adjustment. This will cause the human body pressure on the seat back during adjustment to be transmitted to the cylinder, which will increase the overall pressure on the cylinder and reduce the service life of the drive component. If only a single cylinder is used as a support component, after long-term use, it will affect the stability of the seat back during adjustment. There is also a risk of the seat back falling, affecting the normal use of the dental chair. Utility Model Content

[0004] In order to overcome the defects of the prior art, the utility model provides a dental chair backrest device.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a dental chair backrest device, including a chair frame, a support plate is provided inside the chair frame, a driving assembly is provided on the upper part of the support plate, a movable plate is provided for sliding inside the chair frame, the movable end of the driving assembly is connected to the movable plate, a backrest assembly is provided on one side of the upper surface of the chair frame, the bottom end of the backrest assembly extends into the chair frame and is connected to the movable plate, and support modules are provided at both ends of the movable plate close to the inner side surface of the chair frame, one end of the support module is connected to the surface of the movable plate, and the other end is connected to both sides of the support plate.

[0006] Further description of this solution: the support module includes a first swing arm and a second swing arm, the first swing arm is hinged to the side of the movable plate close to the drive assembly, the second swing arm is hinged to the side of the support plate, the end of the first swing arm away from the movable plate and the end of the second swing arm away from the support plate are hinged to each other, the middle part of the second swing arm is hinged to a third swing arm, and the end of the third swing arm away from the second swing arm is hinged to the inner side surface of the chair frame.

[0007] Further description of this solution: guide grooves are provided on both side surfaces inside the chair frame, and sliding wheels are provided on both side surfaces of the movable plate, and the sliding wheels are slidably provided inside the guide grooves.

[0008] Specifically, a connection seat is provided on the surface of the movable plate close to the driving assembly, and the movable end of the driving assembly is connected in the connection seat, so that the movable plate can be moved by the driving assembly.

[0009] Further description, the driving assembly includes a fixed frame and a push rod member, the fixed frame is arranged inside the chair frame, the push rod member is arranged at the lower part of the fixed frame, the moving end of the push rod member faces the movable plate, and the moving end of the push rod member is provided with a connecting rod, one end of the connecting rod is connected to the push rod member, and the other end is connected to the connecting seat.

[0010] Further description of this solution: the backrest assembly includes a support plate and a connecting plate, the support plate is arranged on the upper side of the chair frame, the connecting plate is arranged on the back of the support plate, one end of the connecting plate is connected to the support plate, and one end of the connecting plate extends into the interior of the chair frame and is connected to the surface of the movable plate.

[0011] Further description of this solution: a seat cushion is provided on the upper surface of the chair frame, and a base is provided on the bottom surface of the support plate.

[0012] The beneficial effect of the present invention is that when adjusting the backrest assembly, the present structure can drive the movable plate to move through the driving assembly, and the movement of the movable plate can drive the backrest assembly to move, thereby realizing the adjustment of the backrest assembly, and the movable plate can synchronously drive the support module to swing when moving. When the seat back is adjusted, the human body pressure on the backrest assembly can be transmitted to the support modules and the driving assembly on both sides of the movable plate through the movable plate, so that the pressure on the backrest can be dispersed to the two groups of support modules, which can reduce the pressure on the driving assembly, thereby improving the service life of the driving assembly, avoiding the situation of using only a single support member as a bearing point, and ensuring the stability of the seat back during adjustment, thereby avoiding the risk of the seat back falling and ensuring the normal use of the dental chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the dental chair of the present invention;

[0014] Figure 2 This is a schematic diagram of the internal structure of the dental chair of the present invention;

[0015] Figure 3 This is a schematic diagram of the overall structure of the backrest device of the utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the backrest device of the utility model;

[0017] Figure 5 This is a structural diagram of the drive assembly, movable plate, backrest assembly and support module of the utility model.

[0018] Shown in the figure: chair frame 1, support plate 2, guide groove 3, drive assembly 4, fixed frame 41, push rod 42, connecting rod 43, movable plate 5, sliding wheel 51, connecting seat 52, backrest assembly 6, support plate 61, connecting plate 62, support module 7, first swing arm 71, second swing arm 72, third swing arm 73, seat cushion 8, and base 9. DETAILED DESCRIPTION

[0019] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0020] As attached Figure 1 、 2 As shown in Figures 3, 4 and 5, the utility model provides a dental chair backrest device, which includes a chair frame 1, a support plate 2 is provided inside the chair frame 1, a drive assembly 4 is provided on the upper part of the support plate 2, a movable plate 5 is provided for sliding inside the chair frame 1, and the movable end of the drive assembly 4 is connected to the movable plate 5, a backrest assembly 6 is provided on one side of the upper surface of the chair frame 1, the bottom end of the backrest assembly 6 extends into the chair frame 1 and is connected to the movable plate 5, and support modules 7 are provided at both ends of the movable plate 5 close to the inner side surface of the chair frame 1, one end of the support module 7 is connected to the surface of the movable plate 5, and the other end is connected to both sides of the support plate 2, a seat cushion 8 is provided on the upper surface of the chair frame 1, and a base 9 is provided on the bottom surface of the support plate 2.

[0021] When adjusting the backrest assembly 6: first, start the driving assembly 4, thereby driving the movable plate 5 to move left and right through the driving assembly 4. When the movable plate 5 moves, it can drive the backrest assembly 6 to move, so that the backrest assembly 6 can be retracted into the chair frame 1, thereby achieving the position adjustment of the backrest;

[0022] Moreover, when the movable plate 5 moves, it can also synchronously drive the support module 7 to swing. When the seat back is adjusted, the human body pressure on the backrest can be transmitted to the support modules 7 and the drive assembly 4 on both sides of the movable plate 5 through the movable plate 5, so that the pressure on the backrest can be dispersed to the two groups of support modules 7, thereby reducing the pressure on the drive assembly 4, thereby improving the service life of the drive assembly 4. Through the synchronous force of the support modules, it can avoid the situation of using only a single support frame as a bearing point, and can ensure the stability of the seat backrest during adjustment, thereby avoiding the risk of the seat backrest falling and ensuring the normal use of the dental chair.

[0023] As attached Figure 2 、 3 As shown in , 4 and 5, guide grooves 3 are opened on both sides of the interior of the chair frame 1, and sliding wheels 51 are set on both sides of the movable plate 5. The sliding wheels 51 are slidably set inside the guide grooves 3. Subsequently, a connecting seat 52 is set on the surface of the movable plate 5 close to the driving component 4, and the moving end of the driving component 4 is connected to the connecting seat 52, so that the movable plate 5 can be moved by the driving component 4.

[0024] The driving assembly 4 includes a fixed frame 41 and a push rod member 42. The fixed frame 41 is arranged inside the chair frame 1, and the push rod member 42 is arranged at the lower part of the fixed frame 41. The moving end of the push rod member 42 faces the movable plate 5. A connecting rod 43 is provided at the movable end of the push rod member 42. One end of the connecting rod 43 is connected to the push rod member 42, so that the connecting rod 43 can be driven to move by the push rod member 42, and the other end of the connecting rod 43 is connected to the connecting seat 52. Subsequently, when the connecting rod 43 moves, it can drive the movable plate 5 to move.

[0025] It should be noted that the push rod 42 is the FY011E push rod of Wuxi Jietino Automation Equipment Co., Ltd.

[0026] The backrest assembly 6 includes a support plate 61 and a connecting plate 62. The support plate 61 is arranged on the upper side of the chair frame 1, and the connecting plate 62 is arranged on the back of the support plate 61. One end of the connecting plate 62 is connected to the support plate 61, and one end of the connecting plate 62 extends into the interior of the chair frame 1 and is connected to the surface of the movable plate 5.

[0027] When it is necessary to move the backrest assembly 6: by starting the push rod 42, the connecting rod 43 is driven to move by the push rod 42. When the connecting rod 43 moves, the movable plate 5 can be driven to move synchronously. One end of the connecting plate 62 is connected to the movable plate 5, so that when the movable plate 5 moves, the connecting plate 62 can be driven to move. When the connecting plate 62 moves, the abutting plate 61 can be driven to move synchronously, thereby realizing the adjustment of the backrest assembly 6.

[0028] It is further explained that when the movable plate 5 moves, it can be guided by the cooperation between the sliding wheel 51 and the guide groove 3, thereby avoiding deviation of the movable plate 5 during movement and ensuring the normal movement of the movable plate 5.

[0029] As attached Figure 2 、 3 , 4 and 5, the support module 7 includes a first swing arm 71 and a second swing arm 72. The first swing arm 71 is hinged to the side of the movable plate 5 close to the drive assembly 4, and the second swing arm 72 is hinged to the side of the support plate 2. The end of the first swing arm 71 away from the movable plate 5 and the end of the second swing arm 72 away from the support plate 2 are hinged to each other;

[0030] When the movable plate 5 moves, it can first drive the first swing arm 71 to swing, and the first swing arm 71 is hinged with the second swing arm 72, so that the second swing arm 72 can be driven to swing by the first swing arm 71, thereby ensuring the normal operation of the support module 7. Subsequently, the second swing arm 72 is hinged with the support plate 2 to adjust the backrest assembly 6. The pressure on the backrest assembly 6 can first be transmitted to the movable plate 5, and then the pressure is transmitted to the first swing arm 71 and the second swing arm 72 through the movable plate 5, and finally transmitted to the support plate 2 through the second swing arm 72, so that the pressure on the backrest can be dispersed to the support plate 2, reducing the stress on the push rod 42, and ensuring the stability of the seat back during adjustment, thereby avoiding the risk of the seat back falling and ensuring the normal use of the dental chair.

[0031] Furthermore, a third swing arm 73 is hinged in the middle of the second swing arm 72. The end of the third swing arm 73 away from the second swing arm 72 is hinged to the inner side of the chair frame 1, and can also transmit pressure to the inner side of the chair frame 1, so as to further disperse the pressure on the support module 7, thereby further ensuring the stability of the backrest assembly 6 during adjustment.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A dental chair backrest device, comprising a chair frame (1), characterized in that: A support plate (2) is provided inside the chair frame (1), a driving assembly (4) is provided on the upper part of the support plate (2), a movable plate (5) is provided for sliding inside the chair frame (1), a movable end of the driving assembly (4) is connected to the movable plate (5), a backrest assembly (6) is provided on one side of the upper surface of the chair frame (1), the bottom end of the backrest assembly (6) extends into the chair frame (1) and is connected to the movable plate (5), and support modules (7) are provided at both ends of the movable plate (5) close to the inner side surface of the chair frame (1), one end of the support module (7) is connected to the surface of the movable plate (5), and the other end is connected to both sides of the support plate (2).

2. A dental chair backrest device according to claim 1, characterized in that: The support module (7) comprises a first swing arm (71) and a second swing arm (72), wherein the first swing arm (71) is hinged to a side of the movable plate (5) close to the drive assembly (4), and the second swing arm (72) is hinged to a side of the support plate (2), an end of the first swing arm (71) away from the movable plate (5) and an end of the second swing arm (72) away from the support plate (2) are hinged to each other, and a third swing arm (73) is hinged to the middle of the second swing arm (72), and an end of the third swing arm (73) away from the second swing arm (72) is hinged to the inner side surface of the chair frame (1).

3. The dental chair backrest device according to claim 1, characterized in that: Guide grooves (3) are provided on both side surfaces of the chair frame (1), and sliding wheels (51) are provided on both side surfaces of the movable plate (5). The sliding wheels (51) are slidably arranged inside the guide grooves (3).

4. The dental chair backrest device according to claim 3, characterized in that: A connecting seat (52) is provided on the surface of the movable plate (5) close to the driving assembly (4), and the movable end of the driving assembly (4) is connected in the connecting seat (52) so that the movable plate (5) can be moved by the driving assembly (4).

5. The dental chair backrest device according to claim 4, characterized in that: The driving assembly (4) includes a fixed frame (41) and a push rod (42), wherein the fixed frame (41) is arranged inside the chair frame (1), and the push rod (42) is arranged at the lower part of the fixed frame (41), and the movable end of the push rod (42) faces the movable plate (5). The movable end of the push rod (42) is provided with a connecting rod (43), one end of the connecting rod (43) is connected to the push rod (42), and the other end is connected to the connecting seat (52).

6. The dental chair backrest device according to claim 1, characterized in that: The backrest assembly (6) includes a support plate (61) and a connecting plate (62), wherein the support plate (61) is arranged on one side of the upper portion of the chair frame (1), and the connecting plate (62) is arranged on the back of the support plate (61), one end of the connecting plate (62) is connected to the support plate (61), and one end of the connecting plate (62) extends into the interior of the chair frame (1) and is connected to the surface of the movable plate (5).

7. The dental chair backrest device according to claim 1, characterized in that: A seat cushion (8) is provided on the upper surface of the chair frame (1), and a base (9) is provided on the bottom surface of the support plate (2).

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