Movable handrail device

Abstract

The utility model relates to the technical field of dental chairs, and discloses a movable armrest device which comprises a first shell and a second shell, a limiting groove is formed in the top face of the first shell, a limiting block matched with the limiting groove is integrally formed and installed on the bottom face of the second shell, a first through hole is formed in the bottom face of the first shell in the vertical direction, and a second through hole is formed in the bottom face of the second shell in the vertical direction. A first through hole is vertically formed in the top face of the first shell, a second through hole is vertically formed in the top face of the second shell, a movable sleeve is slidably connected into the first through hole, the bottom end of the movable sleeve extends out of the second through hole, the movable sleeve is fixed to the bottom wall of the first shell through an elastic assembly, and a limiting strip is installed at the top end of the movable sleeve. A strip-shaped hole is formed in the limiting block in the horizontal direction, and a fastener used for connecting the limiting strip and the second shell is arranged in the strip-shaped hole. According to actual conditions, the positions of the two fasteners in the strip-shaped holes are adjusted, the second shell is arranged in the first shell, and the problem that the second shell cannot be installed into the first shell is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dental chair equipment technical field, concretely is a movable handrail device. BACKGROUND

[0002] Dental chair is for oral surgery and oral disease examination and treatment. Under normal circumstances, movable handrails are installed on the dental chair, and the patient's hands are placed on the two movable handrails during treatment.

[0003] The movable handrail comprises a shell one and a shell two, and a through hole is vertically arranged on the shell one and the shell two, the shell two is arranged in the shell one during installation, and the centers of the two through holes need to be on the same straight line.

[0004] However, in the prior art, the shell one and the shell two are pressure casting, and due to machining errors, the centers of the two through holes are in a misaligned state during machining of the shell one and the shell two, so that the shell two cannot be installed in the shell two, and further improvement is needed.

[0005] Therefore, based on the above technical problems, it is necessary for the person skilled in the art to develop a movable handrail device. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a movable handrail device to solve the problems in the background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A movable handrail device technical scheme, comprising a shell one and a shell two, a limiting groove is arranged on the top surface of the shell one, a limiting block matched with the limiting groove is integrally formed on the bottom surface of the shell two, a through hole one is vertically arranged on the top surface of the shell one, a through hole two is vertically arranged on the bottom surface of the shell two, a moving sleeve is slidably connected in the through hole one, the moving sleeve extends out of the through hole two at the bottom end, the moving sleeve is fixed to the bottom wall of the shell one through an elastic assembly, a limiting strip is arranged at the top end of the moving sleeve, a strip-shaped hole is horizontally arranged on the limiting block, and a fastener for connecting the limiting strip and the shell two is arranged in the strip-shaped hole.

[0009] As a preferred technical scheme, the fastener is a screw, a threaded hole one is arranged on the top surface of the shell two, and the screw is threadedly connected in the threaded hole one through the strip-shaped hole.

[0010] As a preferred technical scheme, the elastic assembly comprises two springs, two cylindrical grooves are symmetrically formed in the bottom surface of the shell one in the vertical direction, the two springs are vertically installed in the two cylindrical grooves respectively, the bottom end of each of the two springs is installed with a moving block, and the top surface of the moving block is provided with a through hole three, and the moving sleeve is installed in the through hole three.

[0011] As a preferred technical scheme, the moving sleeve is installed with a snap spring which abuts against the bottom surface of the moving block.

[0012] As a preferred technical scheme, the top surface of the shell one is integrally formed with a guide column, and the bottom surface of the shell two is provided with a guide hole which is matched with the guide column.

[0013] As a preferred technical scheme, the side wall of the shell one is provided with a mounting groove, the mounting groove is installed with a wear-resistant sleeve, and the moving sleeve is slidably connected in the wear-resistant sleeve in the vertical direction.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] (1) The utility model discloses a movable handrail device, when fixing the shell one and the shell two, the moving sleeve is slidably connected in the through hole one in advance, the bottom end of the moving sleeve is fixed with the shell one through the elastic assembly, the moving sleeve is inserted into the through hole two, finally, according to the actual situation, the position of the two bolts in the strip-shaped hole is adjusted, the shell two is arranged in the shell one, and the situation that the shell two cannot be installed into the shell one is solved.

[0016] (2) The utility model discloses a movable handrail device, the wear-resistant sleeve is arranged, the moving sleeve is slidably connected in the wear-resistant sleeve in the vertical direction, the wear-resistant sleeve increases the wear resistance between the moving sleeve and the shell one, reduces the probability that the moving sleeve is abraded, and prolongs the service life of the moving sleeve. DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of a movable handrail device.

[0018] Figure 2 It is a sectional view of a movable handrail device.

[0019] Figure 3 It is Figure 2 It is a local enlarged view of A in the middle.

[0020] In the drawing marks: 1, shell one; 2, shell two; 3, limit groove; 4, limit block; 5, through hole one; 6, through hole two; 8, moving sleeve; 9, limit strip; 10, strip hole; 11, screw; 12, threaded hole one; 13, spring; 14, moving block; 15, cylindrical groove; 17, circlip; 18, guide column; 19, guide hole; 21, wear-resistant sleeve. DETAILED DESCRIPTION

[0021] The features and exemplary embodiments of each aspect of the present application will be described in detail below, in order to make the purpose, technical scheme and advantages of the present application more clear and apparent, the present application will be further described in detail below with reference to the drawings and specific embodiments. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0022] As Figures 1-3 The present application provides a movable handrail device technical scheme: including shell one 1 and shell two 2, one end of shell one 1 is fixed with dental chair, shell two 2 is arranged on the top surface of shell one 1, when the patient sits on the dental chair, the patient's hands are placed on shell two 2, when the treatment is finished, the patient first pulls shell two 2 upward, and then rotates shell two 2, so that the patient can leave the dental chair conveniently.

[0023] In this embodiment, a limit groove 3 is formed on the top surface of shell one 1, and a limit block 4 adapted to the limit groove 3 is integrally formed and mounted on the bottom surface of shell two 2. The limit block 4 can slide along the limit groove 3. When it is needed to rotate shell two 2, the limit block 4 is first pulled upward.

[0024] In this embodiment, a guide column 18 is integrally formed and mounted on the top surface of shell one 1, and a guide hole 19 adapted to the guide column 18 is formed on the bottom surface of shell two 2. When the shell moves downward, the two guide columns 18 respectively enter the two guide holes 19. The two guide columns 18 have a guiding effect on the vertical movement of shell two 2.

[0025] In this embodiment, a through hole one 5 is formed on the top surface of shell one 1 in the vertical direction, and a through hole two 6 is vertically formed on the bottom surface of shell two 2. The through hole one 5 and the through hole two 6 are arranged correspondingly. Meanwhile, a moving sleeve 8 is slidably connected in the through hole one 5. The moving sleeve 8 is slidably connected in the through hole one 5. The bottom end of the moving sleeve 8 extends out of the through hole two 6. The moving sleeve 8 is fixed to the bottom wall of shell one 1 by an elastic assembly.

[0026] The elastic assembly comprises two springs 13, two cylindrical grooves 15 are symmetrically formed in the bottom surface of the shell one 1 in the vertical direction, the openings of the two cylindrical grooves 15 are arranged downward, the two springs 13 are vertically installed in the two cylindrical grooves 15 respectively, the bottom ends of the two springs 13 are both provided with a moving block 14, a through hole three is formed in the top surface of the moving block 14, the moving sleeve 8 is installed in the through hole three, the shell two 2 is moved upward, the shell two 2 drives the moving sleeve 8 to move vertically, the moving sleeve 8 drives the moving block 14 to move upward, the moving block 14 compresses the two springs 13, after the position of the shell two 2 is adjusted, the shell two 2 is loosened, the two springs 13 return to deformation, the moving block 14 moves downward, the moving block 14 drives the moving sleeve 8 to move downward, and the moving sleeve 8 drives the shell two 2 to move downward into the shell one 1.

[0027] In the embodiment, in order to reduce the relative sliding between the moving block 14 and the moving sleeve 8, a clamping spring 17 is installed on the side of the moving sleeve 8 and abuts against the bottom surface of the moving block 14, and the clamping spring 17 has a limiting effect.

[0028] In the embodiment, a limiting strip 9 is installed at the top end of the moving sleeve 8, two strip-shaped holes 10 are symmetrically formed in the top surface of the limiting strip 9 in the horizontal direction, and fasteners for connecting the limiting strip 9 and the shell two 2 are arranged in the two strip-shaped holes 10, wherein the fasteners are screws 11, two threaded holes one 12 are symmetrically formed in the top surface of the shell two 2, and the two screws 11 are respectively screwed into the two threaded holes one 12 through the two strip-shaped holes 10.

[0029] When the staff fixes the shell one 1 and the shell two 2, the moving sleeve 8 is slidably connected in the through hole one 5 in advance, the bottom end of the moving sleeve 8 is fixed to the shell one 1 through the elastic assembly, the moving sleeve 8 is inserted into the through hole two 6, and finally, according to the actual situation, the positions of the two screws in the strip-shaped holes 10 are adjusted, the shell two 2 is installed in the shell one 1, and the situation that the shell two 2 cannot be installed into the shell one 1 is solved.

[0030] In the embodiment, an installation groove is formed in the side wall of the shell one 1, a wear-resistant sleeve 21 is installed in the installation groove, and the moving sleeve 8 is slidably connected in the wear-resistant sleeve 21 in the vertical direction, so that the wear resistance between the moving sleeve 8 and the shell one 1 is increased, the probability of wear of the moving sleeve 8 is reduced, and the service life of the moving sleeve 8 is increased.

[0031] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the application concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

[0032] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or be integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship of two elements, unless otherwise explicitly limited, the above terms in the utility model can be understood according to the specific meaning in the specific circumstances by the ordinary skilled in the art.

[0034] According to the above embodiments of the utility model, these embodiments do not describe all the details, and do not limit the utility model to the specific embodiments. Obviously, according to the above description, many modifications and changes can be made. The embodiments are selected and specifically described in the specification in order to better explain the principles and practical application of the utility model, so that the skilled in the art can well utilize the utility model and the modified use based on the utility model. Any modification, equivalent replacement, improvement and the like made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A moving handrail device, characterized by, It includes shell one (1) and shell two (2), the top surface of shell one (1) is provided with limiting groove (3), the bottom surface of shell two (2) is integrally formed with limiting block (4) matched with limiting groove (3), the top surface of shell one (1) is provided with through hole one (5) in vertical direction, the bottom surface of shell two (2) is provided with through hole two (6) in vertical direction, the mobile sleeve (8) is slidably connected in through hole one (5), the bottom end of mobile sleeve (8) extends out of through hole two (6), mobile sleeve (8) is fixed with the bottom wall of shell one (1) through elastic assembly, the top end of mobile sleeve (8) is provided with limiting strip (9), limiting strip (9) is provided with strip hole (10) in horizontal direction, fastener for connecting limiting strip (9) and shell two (2) is arranged in strip hole (10).

2. A moving handrail device according to claim 1, characterized in that The fastener is screw (11), the top surface of shell two (2) is provided with threaded hole one (12), screw (11) is threadedly connected in threaded hole one (12) through strip hole (10).

3. A moving handrail device according to claim 1, characterized in that: The elastic assembly includes two springs (13), the bottom surface of shell one (1) is provided with two cylindrical grooves (15) in vertical direction, two springs (13) are respectively vertically installed in two cylindrical grooves (15), the bottom end of two springs (13) is provided with moving block (14), the top surface of moving block (14) is provided with through hole three, moving sleeve (8) is installed in through hole three.

4. A moving handrail device according to claim 3, characterized in that: The periphery of moving sleeve (8) is provided with snap spring (17) abutting with the bottom surface of moving block (14).

5. A moving handrail device according to claim 1, characterized in that: The top surface of shell one (1) is integrally provided with guide column (18), the bottom surface of shell two (2) is provided with guide hole (19) matched with guide column (18).

6. A moving handrail device according to claim 1, characterized in that: The side wall of shell one (1) is provided with mounting groove, the mounting groove is provided with wear-resistant sleeve (21), mobile sleeve (8) is slidably connected in wear-resistant sleeve (21) in vertical direction.

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