Handrail arm rotation adjusting structure

Abstract

The utility model relates to the technical field of seat armrests, and discloses an armrest arm rotation adjusting structure which comprises a fixing rod, an armrest arm and a button, one end of the fixing rod is provided with a connecting cylinder, the side portion of the connecting cylinder is provided with an arc-shaped through groove arranged around the axis of the connecting cylinder and a plurality of locking through grooves distributed along the periphery of the connecting cylinder, and the button is arranged on the arc-shaped through groove. The arc-shaped through groove is communicated with the locking through groove, a mounting part is arranged at the bottom of the armrest arm and provided with a mounting hole rotationally matched with the connecting cylinder, a communicating groove communicated with the mounting hole is formed in the side portion of the mounting part, the position of the communicating groove corresponds to the position of the arc-shaped through groove, and the key is arranged on the side, away from the mounting part, of the communicating groove; a positioning rod is arranged on the side, close to the communicating groove, of the key, penetrates through the communicating groove and is in sliding fit with the arc-shaped through groove, the positioning rod is fixedly connected with the installation part in the circumferential direction, a locking block matched with the locking through groove is arranged on the positioning rod, and a reset spring is arranged between the key and the side portion of the installation part. The utility model has the advantages of simple operation and stable structure.

Description

Technical Field

[0001] The utility model relates to the technical field of seat armrests, in particular to an armrest rotation adjustment structure. Background Art

[0002] Armrests are generally installed on both sides of the seat. The seat armrest is an important component in the seat design, which provides users with additional support and comfort. With the development of society, people have higher and higher requirements for the comfort of armrests, so the armrests have gradually developed from the original mechanical fixed type to the adjustable type. The existing adjustable seat armrests generally include a fixed rod, an armrest arm, and an armrest plate. The fixed rod is installed and fixed on the seat. The armrest arm is fixedly connected to the fixed rod to support the armrest plate, and the armrest plate is movably and adjustably installed on the armrest arm, thereby realizing the position adjustment of the armrest plate. However, the armrest arm of the existing adjustable seat armrest is generally fixed, which limits the adjustable range of the armrest plate. In addition, the armrest arm cannot be folded when the armrest is not needed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an armrest rotation adjustment structure which is easy to operate and has a stable structure.

[0004] The cam is an angular channel that is formed on a pair of cam faces the axis of the linking sleeve and is adapted to move the linking sleeve toward the cam face, the cam being capable of moving relative to the axis of the linking sleeve when the cam faces the axis of the linking sleeve.

[0005] As a preferred solution of the utility model, a positioning groove cooperating with the button is provided on the side of the mounting portion, the connecting groove is provided at the bottom of the positioning groove, and the return spring is provided between the button and the bottom of the positioning groove.

[0006] As a preferred solution of the utility model, a first limiting groove is provided on the outer side of one end of the mounting hole away from the fixing rod, and the first limiting groove is arranged around the axis of the mounting hole. A limiting block is provided on the outer side of one end of the connecting tube away from the fixing rod, and the limiting block can be slidably arranged in the first limiting groove.

[0007] As a preferred solution of the utility model, a limiting flange is provided at one end of the connecting tube close to the fixing rod, and the mounting portion is provided with a second limiting groove rotatably matched with the limiting flange.

[0008] As a preferred embodiment of the present invention, the connecting tube includes a first arc-shaped portion and a second arc-shaped portion, the first arc-shaped portion and the second arc-shaped portion are connected in a cylindrical shape, the arc-shaped through groove is arranged on the side of the first arc-shaped portion, and the first arc-shaped portion and the second arc-shaped portion are detachably connected or integrally formed.

[0009] As a preferred solution of the utility model, a cover plate is provided at one end of the mounting hole away from the fixing rod.

[0010] The rotation adjustment structure of an armrest of the utility model embodiment has the following beneficial effects compared with the prior art: in a normal state, the positioning rod is inserted in the arc-shaped through groove, and the locking block is inserted in the locking through groove, that is, the locking arm is in a locked state at this time and cannot be rotated at will, so as to ensure that it is in a predetermined position and the structure is stable; when it is necessary to rotate and adjust the armrest, the button is pressed along the radial direction of the mounting hole. At this time, the reset spring is compressed, so that the locking block is separated from the locking through groove, and the locking arm is in an unlocked state. The locking arm can rotate around the axis of the mounting hole together with the button, and when the positioning rod moves to a position corresponding to the position of the locking block and the other locking through groove, the button is released, and under the elastic force of the reset spring, the locking block returns to cooperate with the locking through groove, and the locking arm returns to a locked state, thereby completing the rotation adjustment of the armrest, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 It is a cross-sectional view of the connection between the connecting tube and the mounting portion of the utility model;

[0013] Figure 3 It is an exploded structural diagram of the cover plate and the mounting part of the utility model;

[0014] Figure 4 This is a structural diagram of the connection between the positioning rod and the connecting tube of the utility model;

[0015] Figure 5 It is a structural diagram of the connecting tube of the utility model;

[0016] Figure 6 It is a structural diagram of the installation part of the utility model;

[0017] Figure 7 It is a structural diagram of the key of the utility model;

[0018] Figure 8 This is a structural diagram of the armrest of the utility model after rotation and adjustment;

[0019] Fig. 9 This is another structural diagram of the armrest of the utility model after rotation and adjustment;

[0020] Fig.10 This is an exploded structural diagram of the first arc-shaped portion and the second arc-shaped portion of the utility model;

[0021] Fig.11 This is a structural diagram of the first arc-shaped portion and the second arc-shaped portion of the utility model being integrally formed;

[0022] In the figure, 1. fixing rod; 2. armrest; 21. mounting portion; 211. mounting hole; 212. first limiting groove; 213. second limiting groove; 22. connecting groove; 23. positioning groove; 3. button; 4. connecting tube; 41. arc-shaped through groove; 42. locking through groove; 43. limiting block; 44. limiting flange; 45. first arc-shaped portion; 46. second arc-shaped portion; 5. positioning rod; 51. locking block; 6. reset spring; 7. cover plate. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] like Figure 1-9As shown, a rotation adjustment structure of an armrest arm 2 of a preferred embodiment of the utility model comprises a fixing rod 1, an armrest arm 2 and a button 3, a connecting tube 4 is provided at one end of the fixing rod 1, a side portion of the connecting tube 4 is provided with an arcuate through groove 41 arranged around the axis of the connecting tube 4 and a plurality of locking through grooves 42 distributed along the outer circumference of the connecting tube 4, the arcuate through groove 41 and the locking through groove 42 respectively penetrate the side portion of the connecting tube 4 along the radial direction of the connecting tube 4 (that is, the arcuate through groove 41 and the locking through groove 42 are respectively connected to the interior of the connecting tube 4), the arcuate through groove 41 is connected to the locking through groove 42, a mounting portion 21 is provided at the bottom of the armrest arm 2, the mounting portion 21 is provided with a mounting hole 211 rotatably matched with the connecting tube 4, that is, the mounting portion 21 can be rotatably sleeved on the connecting tube 4, and the side portion of the mounting portion 21 is provided with a communicating hole 211 communicating with the mounting hole 211 Slot 22, the position of the connecting slot 22 corresponds to the position of the arc-shaped through slot 41, the button 3 is arranged on the side of the connecting slot 22 away from the mounting portion 21, and a positioning rod 5 is provided on the side of the button 3 close to the connecting slot 22. Generally, the positioning rod 5 is arranged along the radial direction of the mounting hole 211, the positioning rod 5 passes through the connecting slot 22 and slides with the arc-shaped through slot 41, the positioning rod 5 can move along the radial direction of the mounting hole 211, and can slide along the arc-shaped through slot 41, the positioning rod 5 is provided with a locking block 51 that cooperates with the locking through slot 42, the locking block 51 can move along the radial direction of the mounting hole 211, the positioning rod 5 is circumferentially fixedly connected to the mounting portion 21, in this embodiment, the positioning rod 5 slides with the connecting slot 22 to ensure that the positioning rod 5 can rotate with the mounting portion 21, and a return spring 6 is provided between the button 3 and the side of the mounting portion 21.

[0026] The working principle of this embodiment is as follows: in a normal state, the positioning rod 5 is inserted into the arc groove 41, and the locking block 51 is inserted into the locking groove 42. Since the locking block 51 cooperates with the locking groove 42, the positioning rod 5 is restricted from sliding along the arc groove 41, and the mounting portion 21 is circumferentially fixedly connected to the positioning rod 5, that is, the locking arm is in a locked state at this time and cannot be rotated at will, so as to ensure that it is in a predetermined position and the structure is stable; when it is necessary to rotate and adjust the armrest 2, the button 3 is pressed along the radial direction of the mounting hole 211, and the return spring 6 is compressed at this time, and the positioning rod 5 and the locking block 51 move along the radial direction of the mounting hole 211 toward the mounting hole 211, so that The locking block 51 is separated from the locking slot 42. At this time, the positioning rod 5 can slide along the arc slot 41 (that is, rotate around the axis of the mounting hole 211). That is, the locking arm is in the unlocked state at this time, and the locking arm can rotate around the axis of the mounting hole 211 together with the button 3. When the positioning rod 5 moves to the position of the locking block 51 corresponding to the position of the other locking slot 42, the button 3 is released. Under the elastic force of the reset spring 6, the positioning rod 5 moves in the radial direction of the mounting hole 211 away from the mounting hole 211, so that the locking block 51 is restored to cooperate with the locking slot 42, and the locking arm is restored to the locked state, thereby completing the rotation adjustment of the armrest 2. Figure 8When the armrest is not needed, the armrest 2 can be rotated and adjusted to a horizontal state (ie, folded), as shown in FIG. Fig. 9 shown.

[0027] Exemplarily, a positioning groove 23 cooperating with the button 3 is provided on the side of the mounting portion 21, the connecting groove 22 is provided at the bottom of the positioning groove 23, and the return spring 6 is provided between the button 3 and the bottom of the positioning groove 23 to facilitate the positioning and installation of the button 3 and the return spring 6.

[0028] Exemplarily, a first limiting groove 212 is provided on the outer side of one end of the mounting hole 211 away from the fixing rod 1, and the first limiting groove 212 is arranged around the axis of the mounting hole 211. A limiting block 43 is provided on the outer side of one end of the connecting tube 4 away from the fixing rod 1, and the limiting block 43 can be slidably arranged in the first limiting groove 212. The setting of the limiting block 43 can prevent the mounting part 21 from moving in a direction away from the fixing rod 1.

[0029] Exemplarily, a limiting flange 44 is provided at one end of the connecting tube 4 close to the fixing rod 1 , and the mounting portion 21 is provided with a second limiting groove 213 rotatably matched with the limiting flange 44 , thereby preventing the mounting portion 21 from moving toward the fixing rod 1 .

[0030] Exemplarily, the connecting tube 4 includes a first arc portion 45 and a second arc portion 46, the first arc portion 45 and the second arc portion 46 are connected to form a cylindrical shape, the arc-shaped through groove 41 is provided on the side of the first arc portion 45, the first arc portion 45 and the second arc portion 46 are detachably connected or integrally formed, when the first arc portion 45 and the second arc portion 46 are detachably connected (such as Fig.10 As shown), generally, the second arc portion 46 is made of plastic, and the first arc portion 45 can be made of metal to increase its strength. In addition, the first arc portion 45 can be integrally formed with the second arc portion 46 (as shown in FIG. Fig.11 As shown), that is, both are made of plastic, which is easy to produce.

[0031] Exemplarily, a cover plate 7 is provided at one end of the mounting hole 211 away from the fixing rod 1 to play a decorative and dustproof role.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A rotation adjustment structure for an armrest, characterized in that: The lock member is a pair of locks, each of which has a first end that is adapted to engage with the second end of the locking member and a second end that is adapted to engage with the second end of the locking member.

2. The armrest rotation adjustment structure according to claim 1, characterized in that: A positioning groove matched with the button is arranged on the side of the mounting portion, the communicating groove is arranged at the bottom of the positioning groove, and the return spring is arranged between the button and the bottom of the positioning groove.

3. The armrest rotation adjustment structure according to claim 1, characterized in that: A first limiting groove is provided on the outer side of one end of the mounting hole away from the fixing rod, and the first limiting groove is arranged around the axis of the mounting hole. A limiting block is provided on the outer side of one end of the connecting tube away from the fixing rod, and the limiting block can be slidably arranged in the first limiting groove.

4. The armrest rotation adjustment structure according to claim 1, characterized in that: A limiting flange is provided at one end of the connecting tube close to the fixing rod, and the mounting portion is provided with a second limiting groove rotatably matched with the limiting flange.

5. The armrest rotation adjustment structure according to claim 1, characterized in that: The connecting tube includes a first arc-shaped portion and a second arc-shaped portion, the first arc-shaped portion and the second arc-shaped portion are connected to form a cylindrical shape, the arc-shaped through groove is arranged on the side of the first arc-shaped portion, and the first arc-shaped portion and the second arc-shaped portion are detachably connected or integrally formed.

6. The armrest rotation adjustment structure according to claim 1, characterized in that: An end of the mounting hole away from the fixing rod is covered with a cover plate.

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