Rotary positioning mechanism and seat

Abstract

The utility model provides a rotary positioning mechanism and a seat. The rotary positioning mechanism comprises a gear seat, a rotary seat, a gear engaging piece and a triggering piece, the gear engaging piece is arranged between the rotating seat and the gear seat, comprises clamping teeth facing the gear groove, can elastically stretch out and draw back in the direction close to or away from the gear groove, and drives the clamping teeth to be inserted into or separated from the gear groove; the triggering piece is arranged on the gear engaging piece; the gear engaging piece is selectively triggered by the triggering piece, so that the rotating seat and the gear seat can be freely switched between a positioning state and a rotating state; according to the whole rotary positioning mechanism, on the premise that normal rotation or positioning of the rotating base is guaranteed, the number of parts of the mechanism is reduced, the structure of the parts of the mechanism is simplified, the installation difficulty and production cost of the rotary positioning mechanism are reduced, and the assembly efficiency of the rotary positioning mechanism is improved. The utility model further provides the seat, the rotary positioning mechanism is arranged between the armrest and the seat body of the seat, so that the armrest can freely rotate or be positioned in the vertical direction under the control of the rotary positioning mechanism.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a rotation positioning mechanism and a seat. Background Art

[0002] In order to improve the comfort of using the chair, the ergonomic chairs on the market are equipped with armrests that can be adjusted up and down. Such armrests can be rotated up and down to adapt to different sitting postures, and usually rely on a rotation positioning mechanism between the armrest and the chair body to position the armrest after rotation.

[0003] For example, in the handrail patent with publication number CN220403553U, as shown in the patent Figure 2-4 As shown, in order for the armrest board B7 to be rotated and positioned relative to the armrest board A6, it is necessary to first press the button 8 to push the rotating rod 9 to rotate around the rotating shaft 10, so that the rotating shaft 10 triggers the horizontal movable plate 13 to move horizontally, and drives the movable plug plate 14 to disengage from the slot 18, so as to release the positioning and realize the upward flipping of the armrest board B7; after the rotation is completed, release the button 8, and under the action of the reset spring, the horizontal movable plate 13 will drive the movable plug plate 14 to be inserted into the slot again, so that the armrest board B7 is positioned in the position where the rotation stops; it is not difficult to see that the structure of this rotation and positioning mechanism is complex and requires the linkage and cooperation of multiple rods, which will increase the cost of its design and production; in addition, since the armrest itself has a limited volume, it is difficult to assemble so many mechanisms with complex structures and numerous parts in a limited volume, which is also relatively difficult and easily affects the production efficiency of the armrest. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a rotation positioning mechanism, which can selectively trigger the gear engaging member through the trigger member so that the rotating seat and the gear seat can be freely switched between the positioning state and the rotation state; the entire rotation positioning mechanism simplifies the number of parts and structure of the mechanism while ensuring the normal rotation or positioning of the rotating seat, reduces the installation difficulty and production cost of the rotation positioning mechanism, and improves the assembly efficiency of the rotation positioning mechanism.

[0005] Furthermore, a chair is provided, in which the rotation positioning mechanism is installed between the armrest and the chair body of the chair, so that the armrest can be freely rotated or positioned in the up and down directions under the control of the rotation positioning mechanism.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A rotation positioning mechanism, comprising

[0008] The gear seat is provided with a plurality of gear slots evenly distributed in the circumferential direction;

[0009] Rotating seat; one end of the rotating seat is rotatably connected to the gear seat;

[0010] The gear hanging member is arranged between the rotating seat and the gear seat, and the gear hanging member includes a latching tooth facing the gear slot, and the gear hanging member can be elastically extended in a direction close to or away from the gear slot, and drives the latching tooth to insert into or out of the gear slot; the end of the gear hanging member facing away from the gear slot is provided with a first inclined surface;

[0011] A triggering member, arranged on the gear engaging member, the triggering member comprising a second inclined surface facing the first inclined surface;

[0012] The mechanism has a rotating state and a positioning state. When the mechanism is in the positioning state, the latch tooth is inserted into one of the gear slots, and the rotating seat remains circumferentially fixed relative to the gear seat; when the mechanism switches to the rotating state, the trigger member can, under the action of external force, drive the second inclined surface to squeeze the first inclined surface, so that the gear hanging member elastically retracts along the radial direction of the gear seat, thereby separating the latch tooth from the gear slot, and the rotating seat can rotate circumferentially relative to the gear seat; when the latch tooth rotates to another gear slot driven by the gear seat, the external force on the trigger member is removed, and the gear hanging member can elastically extend along the radial direction of the gear seat, and drive the first inclined surface to squeeze the second inclined surface, so that the trigger member automatically resets, while driving the latch tooth to insert into another gear slot, thereby switching the mechanism back to the positioning state.

[0013] Preferably, the rotating seat includes a connecting end rotatably connected to the gear seat, the middle part of the connecting end is recessed to form a accommodating area, and the gear seat is located in the accommodating area; this further saves the space occupied by the connecting position between the rotating seat and the gear seat.

[0014] Preferably, the bottom of the rotating seat is recessed inward to form a U-shaped mounting groove with an open lower end, and the U-shaped mounting groove is connected to the accommodating area front to back; the gear hanging piece is arranged in the U-shaped mounting groove, and the trigger piece is arranged at the lower end of the gear hanging piece, and can move upward under the action of external force; the U-shaped mounting groove provides an internal space for the gear hanging piece to be installed, thereby avoiding the gear hanging piece from being exposed outward and affecting the appearance of the rotating positioning mechanism, and making the structure of the entire rotating positioning mechanism more concise.

[0015] Preferably, a accommodating groove is provided on the gear hanging member, and a compression spring is provided in the accommodating groove which can be elastically deformed in a direction close to or away from the gear slot; the U-shaped mounting groove has a top wall, and a downwardly extending limit plate is provided on the top wall, and the limit plate abuts against one end of the compression spring facing away from the gear seat; the limit plate and the compression spring cooperate to provide elastic expansion and contraction force for the gear hanging member, so that the gear hanging member can elastically expand and contract along the radial direction of the gear seat.

[0016] Preferably, a sealing plate is connected to the lower opening of the U-shaped mounting groove, and the lower end of the trigger member is exposed outside the sealing plate to form a protruding pressing portion, so as to facilitate applying an upward external force to the trigger member from the outside of the sealing plate.

[0017] Preferably, a cavity is provided on the shift member which passes through from top to bottom, and a first inclined surface is arranged on the inner wall of the cavity; the first inclined surface of the trigger member is arranged on its upper end; when the first inclined surface of the trigger member squeezes the second inclined surface, the trigger member moves upward in the cavity; when the first inclined surface squeezes the second inclined surface of the trigger member, the trigger member resets downward in the cavity; the cavity can provide an accommodating space for the trigger member, and at the same time utilizes the first inclined surface on the cavity to interact with the second inclined surface of the trigger member; this design kills two birds with one stone and is ingenious.

[0018] Preferably, a buckle is provided on the upper end of the trigger member, which abuts against the upper end surface of the shift member; when the mechanism is in a rotating state, the trigger member is separated from the shift member under the action of external force, and when the mechanism is switched to a positioning state, the buckle abuts against the upper end surface of the shift member again, preventing the trigger member from falling off the shift member.

[0019] Preferably, the trigger member is provided with a limit column extending upward; when the trigger member moves upward under the action of external force and separates the latch tooth from the gear slot, the limit column abuts against the top wall; to prevent the trigger member from moving excessively upward and causing it to separate from the gear engaging member.

[0020] Furthermore, a chair is provided, comprising a chair body, armrests symmetrically arranged on the left and right sides of the chair body, and a rotating positioning mechanism, wherein the gear seat is connected to the chair body, and the rotating seat is connected to the armrests.

[0021] The principle and beneficial effects of the utility model using the above technical solution are:

[0022] The purpose of the utility model is to provide a rotation positioning mechanism, which can switch the rotating seat and the gear seat freely between the positioning state and the rotation state through the selective triggering of the gear engaging member by the trigger member; the entire rotation positioning mechanism eliminates the complex structure of multiple connecting rods while ensuring the normal rotation or positioning of the rotating seat, so that the structure of the entire rotation positioning mechanism is simple and compact, the number of parts and structure of the mechanism are simplified, the installation difficulty and production cost of the rotation positioning mechanism are reduced, and the assembly efficiency of the rotation positioning mechanism is improved.

[0023] Furthermore, a chair is provided, in which the rotation positioning mechanism is installed between the armrest and the chair body of the chair, so that the armrest can be freely rotated or positioned in the up and down directions under the control of the rotation positioning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the rotating positioning mechanism installed on the seat;

[0025] Figure 2 It is a structural schematic diagram of a rotating seat;

[0026] Figure 3 is a cross-sectional view of the rotation positioning mechanism;

[0027] Figure 4 This is a schematic diagram of the structure of the rotation positioning mechanism after the rotation seat is hidden;

[0028] Figure 5 It is a structural schematic diagram of the lower end of the gear-hanging member;

[0029] Figure 6 It is a structural schematic diagram of the upper end of the gear-hanging member;

[0030] Figure 7 It is a schematic diagram of the structure of the trigger;

[0031] Figure 8 This is a schematic diagram of the structure in which the pressing part is exposed outside the guard plate;

[0032] The figures are marked as follows: 1-rotating seat, 2-gear seat, 3-gear hanging member, 4-trigger member, 5-guard plate, 6-compression spring, 7-bracket, 8-armrest, 11-accommodating area, 12-limiting plate, 13-U-shaped mounting groove, 14-top wall, 21-gear groove, 31-gear tooth, 32-second inclined surface, 33-cavity, 35-accommodating groove, 41-limiting column, 42-buckle, 43-first inclined surface, 44-pressing part. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0036] The specific implementation methods of the utility model are as follows:

[0037] like Figure 1-8 As shown, this embodiment provides a rotation positioning mechanism, including:

[0038] The gear seat 2 is cylindrical and remains fixed, and a plurality of gear slots 21 are evenly distributed in the circumferential direction on the gear seat 2;

[0039] Rotating seat 1; the rotating seat 1 is in the shape of a strip, one end of the rotating seat 1 is rotatably connected to the gear seat 2, and can rotate circumferentially relative to the gear seat 2;

[0040] The gear hanging member 3 is a plate member, and the gear hanging member 3 is arranged between the rotating seat 1 and the gear seat 2. The gear hanging member 3 includes a latch 31 facing the gear slot 21. The gear hanging member 3 can be elastically extended in a direction close to or away from the gear slot 21, and drive the latch 31 to insert into or leave the gear slot 21; the end of the gear hanging member 3 facing away from the gear slot 21 is provided with a first inclined surface 32;

[0041] The trigger member 4 is a block-shaped switch, which is arranged on the gear-hanging member 3, and the trigger member 4 includes a second inclined surface 43 facing the first inclined surface 32;

[0042] The mechanism has a rotation state and a positioning state. When the mechanism is in the positioning state, the latch tooth 31 is inserted into one of the gear slots 21, and the rotating seat 1 remains circumferentially fixed relative to the gear seat 2; when the mechanism switches to the rotation state, the trigger member 4 can, under the action of external force, drive the second inclined surface 43 to squeeze the first inclined surface 32, so that the gear engaging member 3 elastically retracts radially along the gear seat 2, thereby separating the latch tooth 31 from the gear slot 21, and the rotating seat 1 can rotate circumferentially relative to the gear seat 2; when the latch tooth 31 rotates to another gear slot 21 driven by the gear seat 2, the external force on the trigger member 4 is removed, and the gear engaging member 3 can elastically extend radially along the gear seat 2, and drive the first inclined surface 32 to squeeze the second inclined surface 43, so that the trigger member 4 automatically resets, and drives the latch tooth 31 to insert into another gear slot 21, thereby switching the mechanism back to the positioning state.

[0043] Further, if Figure 2 As shown, the rotating seat 1 includes a rotating connection end, the middle part of which is recessed to form an accommodating area 11, and the gear seat 2 is located in the accommodating area 11 and is rotatably connected to the rotating connection end of the rotating seat 1; thereby further saving the space occupied by the connection position between the rotating seat 1 and the gear seat 2.

[0044] Furthermore, in order to allow the entire gear hanging member 3 to be hidden in the rotating seat 1, the bottom of the rotating seat 1 is recessed inward to form a U-shaped mounting groove 13 with an open lower end, and the U-shaped mounting groove 13, that is, the mounting groove has a U-shaped cross-sectional shape; the U-shaped mounting groove 13 is connected with the accommodating area 11 front to back, so that the gear hanging member 3 can cooperate with the gear seat 2; the gear hanging member 3 is arranged in the U-shaped mounting groove 13, and the trigger member 4 is arranged at the lower end of the gear hanging member 3, and can move upward under the action of external force; the U-shaped mounting groove 13 provides an internal installation space for the gear hanging member 3, avoids the gear hanging member 3 from being exposed to the outside and affecting the appearance of the rotating positioning mechanism, and makes the structure of the entire rotating positioning mechanism more concise.

[0045] Further, if Figure 3-4As shown, the elastic extension and retraction of the gear hanging member 3 in the direction approaching or moving away from the gear slot 21 is achieved as follows: a receiving groove 35 is provided on the gear hanging member 3, and a compression spring 6 which can be elastically deformed in the direction approaching or moving away from the gear slot 21 is provided in the receiving groove 35; the U-shaped mounting groove 13 has a top wall 14, and a downwardly extending limit plate 12 is provided on the top wall 14, and the limit plate 12 abuts against the end of the compression spring 6 facing away from the gear seat 2; the limit plate 12 cooperates with the compression spring 6 to provide elastic extension and retraction force for the gear hanging member 3, so that the gear hanging member 3 can be elastically extended and retracted radially along the gear seat 2.

[0046] Further, if Figure 8 As shown, in order to prevent the gear engaging member 3 and the trigger member 4 from being completely exposed at the opening at the lower end of the U-shaped mounting groove 13, a sealing plate 5 is connected to the lower end opening of the U-shaped mounting groove 13, and the lower end of the trigger member 4 is exposed outside the sealing plate 5, and a protruding pressing portion 44 is formed; the pressing portion 44 is equivalent to a pressing switch, so that an upward external force can be applied to the trigger member 4 from the outside of the sealing plate 5.

[0047] Further, if Figure 4-6 As shown, in order to enable the trigger member 4 to move up and down relative to the shift member 3, and to drive the latch tooth 31 on the shift member 3 to separate from the gear slot 21 by squeezing the first inclined surface 32 of the shift member 3, a cavity 33 is provided on the shift member 3 that passes through from top to bottom. The cavity 33 is rectangular, and the first inclined surface 32 is arranged on the inner wall of the cavity 33, which is the inner wall of the four inner walls of the rectangular cavity 33 facing the latch tooth 31; the first inclined surface 32 of the trigger member 4 is arranged at its upper end; when the first inclined surface 32 of the trigger member 4 squeezes the second inclined surface 43, the trigger member 4 moves upward in the cavity 33; when the first inclined surface 32 squeezes the second inclined surface 43 of the trigger member 4, the trigger member 4 resets downward in the cavity 33; the cavity 33 can provide an accommodating space for the trigger member 4, and at the same time utilizes the interaction between the first inclined surface 32 on the cavity 33 and the second inclined surface 43 of the trigger member 4; this design kills two birds with one stone and is ingenious.

[0048] Further, if Figure 4 , Figure 7 As shown, the trigger member 4 can move up and down relative to the shift member 3. Therefore, in order to prevent the trigger member 4 from disengaging from the shift member 3 downward, causing the first inclined surface 32 to separate from the second inclined surface 43, a buckle 42 abutting against the upper end surface of the shift member 3 is provided at the upper end of the trigger member 4; when the mechanism is in a rotating state, the trigger member 4 is separated from the shift member 3 under the action of external force, and when the mechanism is switched to a positioning state, the buckle 42 abuts against the upper end surface of the shift member 3 again, preventing the trigger member 4 from disengaging from the shift member 3 downward.

[0049] Further, if Figure 3 , Figure 7As shown, the trigger member 4 can move up and down relative to the gear member 3. Therefore, when the pressing portion 41 on the trigger member 4 is subjected to an external force, in order to prevent the trigger member 4 from detaching upward from the gear member 3, causing the trigger member 4 to separate from the second inclined surface 43 and then fall into the U-shaped mounting groove 13 and be unable to reset, a limit column 41 extending upward is provided on the trigger member 4; when the trigger member 4 moves upward under the action of an external force and separates the latch tooth 31 from the gear groove 21, the limit column 41 abuts against the top wall 14; to prevent the trigger member 4 from moving excessively upward and separating from the gear member 3.

[0050] like Figure 1 As shown, a chair is provided, comprising a chair body, armrests 8 symmetrically arranged on the left and right sides of the chair body, and a rotation positioning mechanism, wherein the gear seat 2 is connected to the chair body, and the rotating seat 1 is connected to the armrests; specifically, the chair body can be a chair back or a chair seat; brackets 7 are symmetrically installed on the chair body, the gear seat 2 is fixedly arranged on the brackets 7, and the end of the rotating seat 1 facing away from the gear seat 2, that is, the front end of the seat is connected to the armrest 8 maintained in a horizontal state; the rotation adjustment mechanism is arranged between the armrest 8 of the chair and the chair body, so that the armrest 8 of the chair can be freely rotated up and down to adjust or position, so that the chair can better adapt to different sitting postures.

[0051] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A rotation positioning mechanism, characterized in that: include: The gear seat (2) is provided with a plurality of gear slots (21) evenly distributed in the circumferential direction. A rotating seat (1); one end of the rotating seat (1) is rotatably connected to the gear seat (2); A gear hanging member (3); arranged between the rotating seat (1) and the gear seat (2), the gear hanging member (3) comprising a latching tooth (31) facing the gear slot (21), the gear hanging member (3) being elastically retractable in a direction approaching or moving away from the gear slot (21), and driving the latching tooth (31) to insert into or leave the gear slot (21); a first inclined surface (32) is provided at one end of the gear hanging member (3) facing away from the gear slot (21); A trigger member (4); arranged on the gear engaging member (3), the trigger member (4) comprising a second inclined surface (43) facing the first inclined surface (32); The mechanism has a rotating state and a positioning state. When the mechanism is in the positioning state, the latching tooth (31) is inserted into one of the gear slots (21), and the rotating seat (1) remains circumferentially fixed relative to the gear seat (2). When the mechanism is switched to the rotating state, the trigger member (4) can drive the second inclined surface (43) to squeeze the first inclined surface (32) under the action of an external force, so that the gear engaging member (3) elastically retracts radially along the gear seat (2), thereby separating the latching tooth (31) from the gear slot (21). When the rotating seat (1) is rotated in the circumferential direction relative to the gear seat (2); when the latching tooth (31) is rotated to another gear slot (21) driven by the gear seat (2), the external force on the trigger member (4) is removed, and the gear engaging member (3) can be elastically extended along the radial direction of the gear seat (2), and drive the first inclined surface (32) to press the second inclined surface (43), so that the trigger member (4) is automatically reset, and at the same time, the latching tooth (31) is driven to insert into another gear slot (21), so that the mechanism is switched back to the positioning state.

2. A rotation positioning mechanism according to claim 1, characterized in that: The rotating seat (1) comprises a connecting end rotatably connected to the gear seat (2), the middle part of the connecting end is recessed to form a receiving area (11), and the gear seat (2) is located in the receiving area (11).

3. A rotation positioning mechanism according to claim 1, characterized in that: The bottom of the rotating seat (1) is inwardly recessed to form a U-shaped installation groove (13) with an open lower end, and the U-shaped installation groove (13) and the accommodating area (11) are connected front to back; the gear hanging member (3) is arranged in the U-shaped installation groove (13), and the trigger member (4) is arranged at the lower end of the gear hanging member (3) and can move upward under the action of an external force.

4. A rotation positioning mechanism according to claim 3, characterized in that: The gear hanging member (3) is provided with a receiving groove (35), and a compression spring (6) is provided in the receiving groove (35) and can be elastically deformed in a direction close to or away from the gear position groove (21); the U-shaped installation groove (13) has a top wall (14), and a limit plate (12) extending downward is provided on the top wall (14), and the limit plate (12) abuts against one end of the compression spring (6) facing away from the gear position seat (2).

5. A rotation positioning mechanism according to claim 3, characterized in that: A sealing plate (5) is connected to the lower opening of the U-shaped installation groove (13); the lower end of the trigger member (4) is exposed outside the sealing plate (5) to form a protruding pressing portion (44).

6. A rotation positioning mechanism according to claim 3, characterized in that: The gear engaging member (3) is provided with a cavity (33) which is connected vertically, and the first inclined surface (32) is arranged on the inner wall of the cavity (33); the first inclined surface (32) of the trigger member (4) is arranged at its upper end; when the first inclined surface (32) of the trigger member (4) presses the second inclined surface (43), the trigger member (4) moves upward in the cavity (33); when the first inclined surface (32) presses the second inclined surface (43) of the trigger member (4), the trigger member (4) is reset downward in the cavity (33).

7. A rotation positioning mechanism according to claim 6, characterized in that: The upper end of the trigger member (4) is provided with a buckle (42) that abuts against the upper end surface of the gear-hanging member (3); when the mechanism is in a rotating state, the trigger member (4) is separated from the gear-hanging member (3) under the action of an external force, and when the mechanism is switched to a positioning state, the buckle (42) abuts against the upper end surface of the gear-hanging member (3) again.

8. A rotation positioning mechanism according to claim 6, characterized in that: The trigger member (4) is provided with a limit column (41) extending upward; when the trigger member (4) moves upward under the action of an external force and causes the latching tooth (31) to separate from the shifting groove (21), the limit column (41) abuts against the top wall (14).

9. A seat, characterized in that: It comprises a chair body, armrests (8) symmetrically arranged on the left and right sides of the chair body, and the rotation positioning mechanism according to claim 1, wherein the gear seat (2) is connected to the chair body, and the rotating seat (1) is connected to the armrests (8).

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