CN219049289U - Armrest assembly and dental chair - Google Patents

Abstract

The present utility model provides an armrest assembly comprising: the handrail is rotationally connected with the connecting seat, and the limiting component is arranged on the handrail; the connecting seat is provided with a sliding piece; the handrail is provided with a guide rail which extends around the rotation axis of the handrail, and the sliding piece is movably connected with the guide rail; the limiting assembly comprises a limiting piece, a connecting piece, a pressing piece and a reset elastic piece. Compared with the prior art, the armrest assembly provided by the utility model can rotate relative to the dental chair after being arranged on the dental chair, so that the upper and lower dental chairs of a patient are avoided, and the armrest assembly is simple in structure and convenient to operate.

Description

Armrest assembly and dental chair

Technical Field

The utility model relates to the technical field of medical treatment, in particular to an armrest assembly and a dental chair.

Background

The stomatology is one of the medical disciplines, mainly classified from oral diseases, teeth and dental lesions, and can be classified into oral cosmetology, dental implants, dental orthodontics, dental ulcers and the like. Among these classification items, a dental chair is a device commonly used in the stomatology department, and belongs to one of important devices in the stomatology department, and is used for supporting the body of a patient during oral treatment of the patient.

In order to enable a patient to sit and lie comfortably, the cushion can be designed to be longer, so that the patient can conveniently put feet on the cushion, but the patient can sit on the cushion from the side edge of the cushion or leave the dental chair from the side edge of the cushion due to the longer length of the cushion. And the cushion both sides of current dental chair are provided with the handrail for support patient's arm, and the handrail can prevent patient's whereabouts cushion, and user experience is relatively poor.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings in the prior art and provides an armrest assembly and a dental chair.

One embodiment of the present utility model provides a handrail assembly comprising: the handrail is rotationally connected with the connecting seat, and the limiting component is arranged on the handrail;

the connecting seat is provided with a sliding piece;

the handrail is provided with a guide rail which extends around the rotation axis of the handrail, and the sliding piece is movably connected with the guide rail;

the limiting assembly comprises a limiting part, a connecting part, a pressing part and a reset elastic part, wherein the limiting part is rotationally connected with the handrail, the limiting part stretches into the guide rail and is abutted to the sliding part, the pressing part is rotationally connected with the handrail and is exposed out of the handrail, the pressing part is connected with the limiting part through the connecting part, the reset elastic part is respectively connected with the pressing part and the handrail, after the pressing part rotates, the pressing part drives the limiting part to be separated from the guide rail through the connecting part, and the reset elastic part generates elastic deformation.

Compared with the prior art, the armrest assembly provided by the utility model can rotate relative to the dental chair after being arranged on the dental chair, so that the upper and lower dental chairs of a patient are avoided, and the armrest assembly is simple in structure and convenient to operate.

In some optional embodiments, the limiting member is provided with a limiting groove, the sliding member stretches into the limiting groove, and when the pressing member rotates to enable the limiting member to be separated from the guiding rail, the sliding member is separated from the limiting groove.

In some alternative embodiments, a guide slope is provided on a side of the stopper away from the slider, the guide slope being located within the guide rail, the guide slope gradually extending outward of the guide rail in a direction away from the slider.

In some optional embodiments, the handrail is provided with a mounting groove, the limiting piece is rotationally connected with the mounting groove through a first rotating shaft, the guide rail is communicated with the mounting groove, the reset elastic piece is arranged in the mounting groove and is respectively connected with the inner wall of the mounting groove and the limiting piece, and the connecting piece stretches into the mounting groove and then is connected with the limiting piece.

In some alternative embodiments, a detent is provided in the mounting slot, and the return spring portion extends into the detent.

In some alternative embodiments, the return spring is a spring.

In some optional embodiments, the connecting piece is a connecting rope, a clamping groove is formed in the limiting piece, a connector is connected to the end portion of the connecting piece, and the connector is clamped into the clamping groove.

In some optional embodiments, a cavity is provided in the handrail, the guide rail is rotatably connected with an inner wall of the cavity, the pressing piece passes through the handrail and then extends out of the cavity, the connecting piece is arranged in the cavity, and an end part of the connecting piece extends out of the cavity and then is connected with the limiting piece.

In some optional embodiments, the pressing member includes a button and a rotating member, the rotating member is disposed in the cavity, the rotating member is rotatably connected with an inner wall of the cavity through a second rotating shaft, the button abuts against the rotating member, an end portion of the button passes through the handrail and then protrudes out of the cavity, the button portion is exposed out of the handrail, and the connecting member is connected with the rotating member.

Another embodiment of the present utility model provides a dental chair comprising: the seat cushion is arranged on the support, a connecting seat of the armrest assembly is connected with the support, and armrests of the armrest assembly are arranged on at least one side of the seat cushion.

In order that the utility model may be more clearly understood, specific embodiments thereof will be described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a dental chair according to one embodiment of the present utility model;

FIG. 2 is an exploded view of an armrest assembly according to one embodiment of the present utility model;

FIG. 3 is a cross-sectional view of an armrest assembly according to one embodiment of the present utility model;

fig. 4 is an enlarged view at a shown in fig. 3;

FIG. 5 is a cross-sectional view of the armrest assembly of one embodiment of the present utility model rotated to the stowed position;

fig. 6 is an enlarged view at B shown in fig. 5;

FIG. 7 is a partial schematic illustration of a stop member and a connector member in accordance with one embodiment of the present utility model;

fig. 8 is a schematic view of the armrest assembly according to an embodiment of the present utility model in the hidden space.

Reference numerals illustrate:

10. an armrest; 11. a guide rail; 12. a mounting groove; 13. a positioning groove; 14. a cavity; 20. a connecting seat; 21. a slider; 31. a limiting piece; 311. a guide slope; 312. a limit groove; 313. a clamping groove; 32. a connecting piece; 321. a connector; 33. a pressing member; 331. a button; 332. a rotating member; 34. a return elastic member; 40. a bracket; 41. and (5) a cushion.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is 2 or more, and the meaning of "several" is 1 or more.

Referring to fig. 1 and 2, fig. 1 is a schematic view of a dental chair according to an embodiment of the present utility model, and fig. 2 is an exploded view of an armrest assembly according to an embodiment of the present utility model, comprising: the hand rest 10 is rotationally connected with the connecting seat 20, the connecting seat 20 is used for being assembled on a dental chair, and the limiting assembly is arranged on the hand rest 10.

The connecting seat 20 is provided with a sliding piece 21; the handrail 10 is provided with a guide rail 11, the guide rail 11 extends around the rotation axis of the handrail 10, the sliding piece 21 is movably connected with the guide rail 11, and the sliding piece 21 can slide relative to the guide rail 11. The limiting assembly comprises a limiting piece 31, a connecting piece 32, a pressing piece 33 and a reset elastic piece 34, wherein the limiting piece 31 is rotationally connected with the handrail 10, the limiting piece 31 stretches into the guide rail 11 and abuts against the sliding piece 21, the pressing piece 33 is rotationally connected with the handrail 10 and is exposed out of the handrail 10, the pressing piece 33 is connected with the limiting piece 31 through the connecting piece 32, and the reset elastic piece 34 is respectively connected with the pressing piece 33 and the handrail 10.

Referring to fig. 3 to 6, fig. 3 is a sectional view of an armrest assembly according to an embodiment of the present utility model, fig. 4 is an enlarged view of a portion a shown in fig. 3, fig. 5 is a sectional view of an armrest assembly according to an embodiment of the present utility model when rotated to a retracted position, fig. 6 is an enlarged view of a portion B shown in fig. 5, and when the connection base 20 is assembled to a dental chair, the armrest 10 is positioned on one side of a seat cushion 41 of the dental chair, and the armrest 10 is positioned to support an arm of a patient, wherein the stopper 31 restricts the slider 21 from moving along the guide rail 11; when a patient needs to sit on the seat cushion 41, the armrest 10 needs to be rotated to an avoidance position, so that the patient is avoided, a user rotates the pressing piece 33, the pressing piece 33 drives the limiting piece 31 to be separated from the guide rail 11 through the connecting piece 32, the reset elastic piece 34 generates elastic deformation, at the moment, the limiting piece 31 releases the limitation on the sliding piece 21, the armrest 10 can rotate relative to the connecting seat 20, the sliding piece 21 moves along the guide rail 11 when the armrest 10 rotates, the pressing piece 33 can be loosened when the armrest 10 rotates to the avoidance position, and the reset elastic piece 34 can reset the limiting piece 31 and the pressing piece 33; of course, the state of pressing the pressing piece 33 may be maintained so that the stopper 31 is kept away from the guide rail 11, and in this embodiment, the pressing piece 33 is released after the armrest 10 is rotated to the retracted position.

After the patient sits on the seat cushion 41, if the pressing piece 33 is released before, the limiting piece 31 is rotated away from the guide rail 11 through the pressing piece 33 again, then the handrail 10 is rotated back to the original position, then the elastic force of the reset elastic piece 34 pushes the limiting piece 31 to reset, the limiting piece 31 is reset and drives the pressing piece 33 to reset, and at the moment, the limiting piece 31 is abutted against the sliding piece 21 again and limits the sliding piece 21 to move, so that the handrail 10 cannot rotate. The avoidance position may be a position not higher than the seat cushion 41 or a position located rearward of the seat cushion 41, so as to avoid the patient's upper and lower seat cushions 41 by rotating the armrest 10 to the avoidance position; in the present embodiment, the retracted position is a position not higher than the seat cushion 41, and the armrest 10 needs to be rotated downward to the retracted position.

Referring to fig. 7, which is a schematic view of a part of the stopper and the connector according to an embodiment of the present utility model, in order to facilitate the operation when the armrest 10 rotates in the home position, in some alternative embodiments, when the armrest 10 is in a position capable of supporting the arm of the patient, a guiding inclined surface 311 is disposed on a side of the stopper 31 away from the slider 21, the guiding inclined surface 311 is disposed in the guiding rail 11, and the guiding inclined surface 311 gradually extends outward from the guiding rail 11 in a direction away from the slider 21. When the patient needs to sit on the seat cushion 41, the pressing piece 33 is rotated, the pressing piece 33 drives the limiting piece 31 to be separated from the guide rail 11 through the connecting piece 32, then the armrest 10 rotates, the sliding piece 21 passes over the limiting piece 31, then the pressing piece 33 can be loosened, and the armrest 10 rotates to the avoiding position. When the handrail 10 rotates back to the original position, a user directly breaks the handrail 10 to rotate the handrail 10, when the handrail 10 rotates, the sliding piece 21 moves along the guide rail 11, then the sliding piece 21 is abutted against the guide inclined surface 311, the sliding piece 21 pushes the limiting piece 31 to move along the guide inclined surface 311 while continuing to move along the guide rail 11, and the limiting piece 31 is pushed away from the guide rail 11 through the sliding piece 21, so that the reset elastic piece 34 is elastically deformed; then, after the sliding member 21 passes over the guiding inclined plane 311, the elastic force of the reset elastic member 34 pushes the limiting member 31 to reset, so that the limiting member 31 rotates back into the guiding track 11, and the movement of the sliding member 21 is limited, and the position of the handrail 10 is further limited, so that the handrail 10 can be unlocked and rotated only by pressing the pressing member 33 when the handrail 10 needs to be rotated to the avoiding position, the pressing member 33 does not need to be operated again when the handrail 10 is rotated back to the original position, and the handrail 10 assembly is simpler to operate only by rotating the handrail 10 again.

In order to more stably limit the position of the sliding member 21, in some alternative embodiments, the limiting member 31 is provided with a limiting groove 312, the sliding member 21 extends into the limiting groove 312, when the armrest 10 is in a position capable of supporting the arm of the patient, the sliding member 21 is positioned in the limiting groove 312, when the armrest 10 needs to be rotated to the avoiding position, the pressing member 33 is rotated, so that the limiting member 31 is separated from the guide rail 11, and the sliding member 21 is separated from the limiting groove 312. In the present embodiment, the guide slope 311 and the limit groove 312 are sequentially arranged along the extending direction of the guide rail 11, and the guide slope 311 extends to the opening of the limit groove 312.

Referring to fig. 8, which is a schematic structural diagram of the armrest assembly according to an embodiment of the present utility model when the armrest assembly is hidden, in order to enable the rotating member 332 to rotate stably, in some alternative embodiments, the armrest 10 is provided with a mounting groove 12, the limiting member 31 is connected to the mounting groove 12 in a rotating manner by a first rotating shaft, the guide rail 11 is communicated with the mounting groove 12, the reset elastic member 34 is disposed in the mounting groove 12, and is respectively connected to an inner wall of the mounting groove 12 and the limiting member 31, and the connecting member 32 extends into the mounting groove 12 and is then connected to the limiting member 31.

In order to facilitate positioning of the return elastic member 34, and avoid the offset of the return elastic member 34, in some alternative embodiments, a positioning groove 13 is provided in the mounting groove 12, and the return elastic member 34 partially extends into the positioning groove 13, where two ends of the return elastic member 34 respectively abut against an inner wall of the positioning groove 13 and the limiting member 31.

The return spring 34 may be of a suitable design depending on the actual need, and in some alternative embodiments the return spring 34 is a spring. Of course, the return elastic member 34 may be a metal spring.

For convenience of the arrangement of the pressing member 33 at a position convenient for operation, which may result in the pressing member 33 being relatively far from the position of the limiting member 31, for convenience of the connection of the pressing member 33 and the connecting member 32, in some alternative embodiments, the connecting member 32 is a connecting rope, and the connecting rope has flexibility, so that the structure of the handrail 10 is convenient to adapt, and the structural design is reduced. In order to facilitate connection of the connection rope and the limiting piece 31, a clamping groove 313 is formed in the limiting piece 31, a connector 321 is connected to the end portion of the connecting piece 32, and the connector 321 is clamped into the clamping groove 313. After the pressing piece 33 rotates, the connecting rope is pulled, so that the connecting rope pulls the limiting piece 31 to rotate, and when the elastic force of the reset elastic piece 34 drives the limiting piece 31 to reset, the limiting piece 31 pulls the connecting rope, so that the connecting rope pulls the pressing piece 33 to reset.

In order to facilitate hiding the limiting component, in some alternative embodiments, a cavity 14 is provided in the handrail 10, the guide rail 11 is rotatably connected with an inner wall of the cavity 14 by a pressing piece 33, the pressing piece 33 passes through the handrail 10 and then protrudes out of the cavity 14, the connecting piece 32 is provided in the cavity 14, and an end portion of the connecting piece 32 protrudes out of the cavity 14 and then is connected with the limiting piece 31. In the present embodiment, the cavity 14 communicates with the mounting groove 12 through a through hole, and the connecting member 32 extends into the mounting groove 12 through the through hole and then is connected with the stopper 31.

The structure of the pressing member 33 may be appropriately designed according to practical needs, in some alternative embodiments, the pressing member 33 includes a button 331 and a rotating member 332, the rotating member 332 is disposed in the cavity 14, the rotating member 332 is rotatably connected with an inner wall of the cavity 14 through a second rotating shaft, the button 331 abuts against the rotating member 332, an end portion of the button 331 passes through the handrail 10 and then protrudes out of the cavity 14, the button 331 is partially exposed out of the handrail 10, the connecting member 32 is connected with the rotating member 332, the user presses the button 331 into the cavity 14, the button 331 pushes the rotating member 332 to rotate, and when the rotating member 332 rotates, the rotating member 332 drives the limiting member 31 to rotate through the connecting member 32.

The armrest assembly described above may be used in a dental chair comprising: the seat cushion 41 is arranged on the support 40, the connecting seat 20 of the armrest 10 assembly is connected with the support 40, and at least one side of the seat cushion 41 is provided with the armrest 10 of the armrest 10 assembly. It should be noted that, since the patient can sit on the seat cushion 41 from only one side of the seat cushion 41, the armrest 10 assembly of the present application may be disposed on only one side of the seat cushion 41, while the other side may be disposed with the usual armrest 10 not rotated. Of course, in some embodiments, two armrest 10 assemblies are provided on the support 40, and the armrests 10 of the armrest 10 assemblies are disposed on both sides of the seat cushion 41.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A handrail assembly, comprising: the handrail is rotationally connected with the connecting seat, and the limiting component is arranged on the handrail;

the connecting seat is provided with a sliding piece;

the handrail is provided with a guide rail which extends around the rotation axis of the handrail, and the sliding piece is movably connected with the guide rail;

the limiting assembly comprises a limiting part, a connecting part, a pressing part and a reset elastic part, wherein the limiting part is rotationally connected with the handrail, the limiting part stretches into the guide rail and is abutted to the sliding part, the pressing part is rotationally connected with the handrail and is exposed out of the handrail, the pressing part is connected with the limiting part through the connecting part, the reset elastic part is respectively connected with the pressing part and the handrail, after the pressing part rotates, the pressing part drives the limiting part to be separated from the guide rail through the connecting part, and the reset elastic part generates elastic deformation.

2. A handrail assembly as claimed in claim 1, wherein: the limiting piece is provided with a limiting groove, the sliding piece stretches into the limiting groove, and the pressing piece rotates to enable the limiting piece to be separated from the limiting groove when the limiting piece is separated from the guide rail.

3. A handrail assembly as claimed in claim 1, wherein: one side of the limiting piece, which is far away from the sliding piece, is provided with a guide inclined surface, the guide inclined surface is positioned in the guide rail, and the guide inclined surface gradually extends outwards of the guide rail in a direction far away from the sliding piece.

4. A handrail assembly as claimed in claim 1, wherein: the handrail is provided with a mounting groove, the limiting piece is rotationally connected with the mounting groove through a first rotating shaft, the guide rail is communicated with the mounting groove, the reset elastic piece is arranged in the mounting groove and is respectively connected with the inner wall of the mounting groove and the limiting piece, and the connecting piece stretches into the mounting groove and then is connected with the limiting piece.

5. A handrail assembly as claimed in claim 4, wherein: the mounting groove is internally provided with a positioning groove, and the reset elastic piece part extends into the positioning groove.

6. A handrail assembly as claimed in claim 4, wherein: the reset elastic piece is a spring.

7. A handrail assembly as claimed in any one of claims 1 to 6, wherein: the connecting piece is a connecting rope, a clamping groove is formed in the limiting piece, the end portion of the connecting piece is connected with a connector, and the connector is clamped into the clamping groove.

8. A handrail assembly as claimed in any one of claims 1 to 6, wherein: the handrail is internally provided with a cavity, the guide rail is rotationally connected with the inner wall of the cavity, the pressing part penetrates through the handrail and then stretches out of the cavity, the connecting part is arranged in the cavity, and the end part of the connecting part stretches out of the cavity and then is connected with the limiting part.

9. A handrail assembly as claimed in claim 8, wherein: the pressing piece comprises a button and a rotating piece, the rotating piece is arranged in the cavity, the rotating piece is connected with the inner wall of the cavity in a rotating mode through a second rotating shaft, the button is abutted to the rotating piece, the end portion of the button penetrates through the handrail and then stretches out of the cavity, the button portion is exposed out of the outer side of the handrail, and the connecting piece is connected with the rotating piece.

10. A dental chair, comprising: a support, a cushion and a plurality of armrest assemblies according to any one of claims 1 to 9, wherein the cushion is arranged on the support, a connecting seat of the armrest assembly is connected with the support, and armrests of the armrest assemblies are arranged on at least one side of the cushion.

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