CN219720235U - Back depth adjusting device - Google Patents
Back depth adjusting device Download PDFInfo
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- CN219720235U CN219720235U CN202320480393.5U CN202320480393U CN219720235U CN 219720235 U CN219720235 U CN 219720235U CN 202320480393 U CN202320480393 U CN 202320480393U CN 219720235 U CN219720235 U CN 219720235U
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- clamping
- deflection
- seat
- adjusting guide
- guide seat
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- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 210000000078 claw Anatomy 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
The utility model discloses a back depth adjusting device, which comprises a back support piece and an installation seat; the back support piece is provided with an adjusting guide seat which is in telescopic fit in the mounting seat; a gear adjusting mechanism is arranged between the adjusting guide seat and the mounting seat and comprises a clamping fit section arranged on the adjusting guide seat and a deflection clamping piece which is arranged in the mounting seat and can horizontally elastically deflect; the clamping fit section comprises a rack and an annular groove formed around the rack; one side of the rack is provided with a one-way clamping groove at intervals; the deflection clamping piece is provided with a clamping head protruding into the annular groove, the adjusting guide seat extends forwards relative to the mounting seat to enable the deflection clamping piece to deflect to a groove channel on one side of the annular groove, which is close to the inverted clamping jaw, and the clamping head moves along the annular groove and is sequentially clamped with the unidirectional clamping groove; when the adjusting guide seat extends to the deflection clamping piece and can reversely deflect to the other side of the annular groove, the adjusting guide seat can be reset backwards, so that the clamping head moves along the channel at the other side of the annular groove to reset.
Description
Technical Field
The utility model relates to the field of seats, in particular to a back depth adjusting device.
Background
The child chair is an indispensable tool in leisure, reading and writing of children in family at ordinary times at present, and generally has the functions of stable structure, comfortable riding, convenient movement and the like. Furthermore, the structure of current children's chair is usually that seat support and back of the chair are all installed on fore-and-aft chair pole for seat support and back of the chair can be followed this chair pole and go up and down to adjust, can be according to child's height or user demand to seat support, back of the chair height. However, most of the existing child chairs can only realize the height adjustment of the chair seat and the chair back basically, but cannot adjust the front and back positions of the chair seat and the chair back, and particularly cannot adjust the front and back positions of the chair back, namely the back depth cannot be adjusted.
In the practical use process of the chair, because different people have different sitting postures or children have different demands on the chair back when using the chair, for example, children with high heights generally need the chair back to a little back due to the shape, so that the children with low heights can have more space on the seat plate, and the children with low heights can not naturally bend when sitting on the chair and lean against the chair back due to the smaller shape, so that the children sit for a long time and are uncomfortable. Therefore, children chairs with back capable of being adjusted back and forth, also called back-chasing chairs, appear on the market; however, most of the current chairs adopt telescopic components or gas springs to realize the front-back adjustment of the chair back, so that the chair back only has a rear use position and a front use position in practice, and the adjustment position is limited. Or some devices for adjusting the back of the chair with a plurality of front and back gears are arranged, and the devices are additionally provided with locking mechanisms, so that the back of the chair is required to be movably locked and unlocked during adjustment, and the operation is relatively complicated.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a back depth adjusting device; the deflection clamping piece is utilized to circularly deflect and move in the clamping matching section, so that forward multi-gear adjustment and backward movement reset of the adjusting guide seat are realized; the deflection clamping piece can elastically deflect, and the deflection movement of the deflection clamping piece automatically occurs along with the movement of the adjusting guide seat; therefore, the user only needs to act on the adjusting guide seat to move forwards and backwards during adjustment, so that the operation is very convenient.
The technical scheme of the utility model is realized as follows:
a back depth adjusting device comprises a back support piece and a mounting seat; the back support piece is provided with an adjusting guide seat which stretches out and draws back, and the adjusting guide seat is telescopically matched in the mounting seat; a gear adjusting mechanism is arranged between the adjusting guide seat and the mounting seat and comprises a clamping fit section arranged on the adjusting guide seat and a deflection clamping piece which is correspondingly arranged in the mounting seat and can horizontally and elastically deflect; the clamping fit section comprises a rack arranged along the front-back direction and an annular groove formed around the rack; one side of the rack is provided with spaced back-off claws, and a one-way clamping groove is formed between two adjacent back-off claws; the deflection clamping piece is provided with a clamping head protruding into the annular groove, the adjusting guide seat extends forwards relative to the mounting seat to enable the deflection clamping piece to deflect to a groove channel on one side of the annular groove, which is close to the inverted clamping jaw, and the clamping head moves along the annular groove and is sequentially clamped with the unidirectional clamping groove; the back-off claw is matched with the clamping head to limit the back-off of the adjusting guide seat; when the adjusting guide seat extends to the deflection clamping piece and can reversely deflect to the other side of the annular groove, the adjusting guide seat can be reset backwards, so that the clamping head moves along the channel at the other side of the annular groove to reset.
Preferably, the clamping fit section is arranged at the bottom end of the adjusting guide seat, and the deflection clamping piece is rotatably arranged at a corresponding position in the mounting seat. The gear adjusting mechanism is hidden at the bottom end, and the appearance is attractive.
Preferably, the mounting seat comprises an upper seat and a lower seat which are in butt joint and matched up and down, and a rotating groove is concavely arranged at the lower seat; the deflection clamping piece is arranged along the front-back direction, and one end of the deflection clamping piece is rotatably arranged in the rotation groove; the clamping head is arranged at the other end of the deflection clamping piece.
Preferably, the deflection clamping piece is a horizontal plate-shaped piece, a U-shaped elastic holding ring is held at the outer ring of the deflection clamping piece, and the elastic holding ring is made of a metal elastic sheet; the elastic holding ring comprises elastic side strips which are respectively positioned on two sides of the deflection clamping piece, and the opening end of the elastic holding ring is close to the clamping head; the elastic embracing ring is configured to provide a reset elastic force after deflection for the deflection clamping piece.
Preferably, a limiting protrusion is arranged at a position between the two elastic side bars of the lower seat, and the limiting protrusion can be in abutting fit with the elastic side bars. Then under the action of the elastic holding ring and the limiting bulge, when the deflection clamping piece rotates towards any side, the elastic side bar at the corresponding side follows the deflection clamping piece to elastically deform, and the elastic force for resetting the deflection clamping piece again is provided; the elastic side bar on the other side is in limit abutting connection with the limit bulge.
Preferably, a first guiding inclined wall is arranged at the front end of the rack, and when the adjusting guide seat extends forwards from the rearmost position relative to the mounting seat, the first guiding inclined wall is configured to guide the clamping head into a channel on one side of the annular groove close to the one-way clamping groove.
Preferably, a second guiding inclined wall is correspondingly arranged at the rear end of the rack, and the second guiding inclined wall can guide the clamping head into a channel at the other side of the annular groove. The adjusting guide seat can be acted to reset backwards, and the clamping head directly resets to the initial position along the channel at the other side of the annular channel.
Preferably, the side wall of one side of the rack, which is away from the back-off claw, is arranged straight, and the adjusting guide seat is reset backwards so that the clamping head slides along the side wall of the side of the rack. So that the adjusting slide seat can be reset smoothly.
The design starting point, the idea and the beneficial effects of the utility model adopting the technical scheme are as follows:
according to the back depth adjusting device, the gear adjusting mechanism is arranged between the adjusting guide seat and the mounting seat; the deflection clamping piece is utilized to carry out left and right elastic deflection in the clamping fit interval so as to adapt to the forward and backward movement of the adjusting guide seat, thereby realizing the back depth adjustment. The deflection clamping piece can adaptively adjust the movement of the guide seat to elastically deflect so as to drive the clamping head to circularly move in the annular groove, thereby realizing the gear forward adjustment of the adjustment guide seat and the backward reset of the adjustment guide seat; therefore, a control switch is not required to be additionally arranged, and the chair back depth can be adjusted by directly applying forward or backward acting force to the adjusting guide seat during adjustment, so that the operation is very convenient and practical.
Drawings
FIG. 1 is a schematic perspective view showing the extension of an adjusting guide relative to a mounting base in an embodiment of the present utility model;
FIG. 2 is a schematic perspective view of the adjusting guide seat and the lower seat in the embodiment of the utility model;
FIG. 3 is a schematic perspective view of a connection between a deflection clip and a lower seat according to an embodiment of the present utility model;
FIG. 4 is a schematic view showing the effect of deflecting the deflecting clip to make the clip to be clamped with the unidirectional clamping groove in the embodiment of the utility model;
FIG. 5 is a schematic view showing the effect of the elastic chuck being snapped into the unidirectional chuck slot in the embodiment of the utility model;
FIG. 6 is a schematic view showing the effect of the elastic chuck moving to the rear end of the annular groove in the embodiment of the utility model;
fig. 7 is a schematic view showing the effect of the deflection chuck to reset the chuck along the annular channel in an embodiment of the utility model.
The reference numerals are as follows: a back support 1; a mounting base 2; an upper seat 201; a lower base 202; adjusting the guide seat 3; a clamping fit section 4; a deflection clip 5; a rack 6; an annular groove 7; a back-off claw 8; a one-way clamping groove 9; rotating the groove 10; a chuck 11; an elastic band 12; elastic side bars 1201; a limit projection 13; a first guiding inclined wall 14; a second guiding ramp wall 15.
Detailed Description
In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, the term "at least one" refers to one or more, unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The specific embodiments of the present utility model are as follows:
as shown in fig. 1 to 7, the present utility model provides a back depth adjusting device, which comprises a back support 1 and a mounting seat 2; wherein, back support 1 is used for being connected with the back of the chair, and mount pad 2 is used for being connected with longitudinal chair pole. The back support 1 is provided with an adjusting guide seat 3 extending backwards, the adjusting guide seat 3 is telescopically matched in the mounting seat 2, and then the back depth can be adjusted by telescopic movement of the adjusting guide seat 3 relative to the mounting seat 2. And a gear adjusting mechanism is arranged between the adjusting guide seat 3 and the mounting seat 2 so that the chair back has a plurality of front and back adjusting positions.
As shown in fig. 2-7, the mounting base 2 includes an upper base 201 and a lower base 202 that are in butt-joint and matched up and down; the adjusting guide 3 is clamped between the upper and lower seats 201 and 202. The gear adjusting mechanism comprises a clamping fit section 4 arranged on the adjusting guide seat 3 and a deflection clamping piece 5 which is correspondingly arranged in the mounting seat 2 and can horizontally and elastically deflect. Specifically: the clamping fit section 4 is arranged on the lower end face of the adjusting guide seat 3, and the clamping fit section 4 comprises a rack 6 arranged along the front-back direction and an annular groove 7 formed around the rack 6; one side of the rack 6 is provided with back-off claws 8 which are arranged at intervals from front to back, and a one-way clamping groove 9 is formed between two adjacent back-off claws 8. As shown in fig. 2-3, the deflection clamping piece 5 is rotatably arranged on the lower seat 202, a rotation groove 10 is concavely arranged at the lower seat 202, and the deflection clamping piece 5 is a horizontal plate-shaped piece; one end of the deflection clamping piece 5 is provided with a protruding clamping head 11 which can be matched with the unidirectional clamping groove 9 in a clamping way, and the other end of the deflection clamping piece 5 is rotationally connected in the rotation groove 10.
The U-shaped elastic holding ring 12 is arranged outside the deflection clamping piece 5, and the elastic holding ring 12 is made of a metal elastic sheet; the elastic holding ring 12 comprises elastic side strips 1201 respectively positioned at two sides, the elastic holding ring 12 is held around the deflection clamping piece 5, and the opening end of the elastic holding ring 12 is close to the clamping head 11. A limiting protrusion 13 is further arranged at the middle position of the lower seat 202 between the two elastic side bars 1201, and the limiting protrusion 13 can be in abutting fit with the elastic side bars 1201. Then under the action of the elastic holding ring 12 and the limiting protrusion 13, when the deflection clamping piece 5 rotates towards any side, the elastic side strip 1201 on the corresponding side follows the deflection clamping piece 5 to elastically deform, and provides elastic force for resetting the deflection clamping piece 5 again; while the other side of the elastic side strip 1201 is in limit abutment with the limit projection 13 to provide a supporting force. The deflection clamping piece 5 can elastically deflect towards the left side and the right side, and after deflection, the deflection clamping piece 5 always has a tendency of righting.
As shown in fig. 4-7, the clamping head 11 protrudes into the annular groove 7, and the clamping head 11 can be matched with the unidirectional clamping groove 9 of the rack 6; the specific method is as follows: the front end of the rack 6 is provided with a first guiding inclined wall 14, when the adjusting guide seat 3 extends forwards from the rearmost position relative to the mounting seat 2, the first guiding inclined wall 14 is configured to guide the clamping head 11 to enter a channel of one side of the annular groove 7, which is close to the one-way clamping groove 9, so that the deflection clamping piece 5 deflects towards one side and has a tendency of aligning, and then when the adjusting guide seat 3 extends forwards to a certain position to enable the clamping head 11 of the deflection clamping piece 5 to enter the one-way clamping groove 9, the deflection clamping piece 5 automatically aligns to enable the clamping head 11 to be clamped into the one-way clamping groove 9. And the back-off claw 8 cooperates with the clamping head 11 to limit the back-off of the adjusting guide seat 3, so that the adjusting guide seat 3 can only extend forwards continuously, and then the clamping head 11 can be sequentially clamped and matched with the unidirectional clamping grooves 9 at different positions along the front-back direction, so that the adjusting guide seat 3 has a plurality of adjusting positions. When the adjusting guide seat 3 extends to the end part of the clamping head 11 correspondingly moving to the annular groove 7, the adjusting guide seat 3 moves to the foremost position; the rear end of the rack 6 is correspondingly provided with a second guide inclined wall 15, and the second guide inclined wall 15 can guide the clamping head 11 to enter a channel at the other side of the annular groove 7; then the adjusting guide seat 3 can be acted to reset backwards at the moment, and the clamping head 11 directly resets to the initial position along the channel at the other side of the annular channel 7; and the side wall of one side of the rack 6 deviating from the back-off claw 8 is straightly arranged, and the adjusting guide seat 3 is reset backwards to enable the clamping head 11 to slide along the side wall of the side of the rack 6, so that the adjusting sliding seat 3 is reset smoothly. Then the clamping head 11 moves along the annular groove 7 for one circle, and the adjusting guide seat 3 performs reciprocating motion of extending forwards and resetting backwards once; so that the adjustment is very convenient.
Then, the elastic deflection characteristic of the deflection clamping piece 5 is matched with the clamping matching section 4, so that a user only needs to directly act on the adjusting guide seat 3 to move forwards, and the clamping head 11 can be automatically clamped with the unidirectional clamping groove 9, and multi-gear adjustment is realized. When the adjusting guide seat 3 is required to be reset, the adjusting guide seat 3 is only required to be moved to the forefront end, then the adjusting guide seat 3 is acted to move backwards again, the adjustment is very simple and convenient, and the stepless adjustment is realized.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (8)
1. A back depth adjusting device, characterized in that: comprises a back support piece and a mounting seat; the back support piece is provided with an adjusting guide seat which stretches out and draws back, and the adjusting guide seat is telescopically matched in the mounting seat; a gear adjusting mechanism is arranged between the adjusting guide seat and the mounting seat and comprises a clamping fit section arranged on the adjusting guide seat and a deflection clamping piece which is correspondingly arranged in the mounting seat and can horizontally and elastically deflect; the clamping fit section comprises a rack arranged along the front-back direction and an annular groove formed around the rack; one side of the rack is provided with spaced back-off claws, and a one-way clamping groove is formed between two adjacent back-off claws; the deflection clamping piece is provided with a clamping head protruding into the annular groove, the adjusting guide seat extends forwards relative to the mounting seat to enable the deflection clamping piece to deflect to a groove channel on one side of the annular groove, which is close to the inverted clamping jaw, and the clamping head moves along the annular groove and is sequentially clamped with the unidirectional clamping groove; the back-off claw is matched with the clamping head to limit the back-off of the adjusting guide seat; when the adjusting guide seat extends to the deflection clamping piece and can reversely deflect to the other side of the annular groove, the adjusting guide seat can be reset backwards, so that the clamping head moves along the channel at the other side of the annular groove to reset.
2. The back depth adjustment device according to claim 1, wherein: the clamping fit section is arranged at the bottom end of the adjusting guide seat, and the deflection clamping piece is rotatably arranged at a corresponding position in the mounting seat.
3. The back depth adjustment device according to claim 2, wherein: the mounting seat comprises an upper seat and a lower seat which are in butt joint and matched up and down, and a rotating groove is concavely arranged at the lower seat; the deflection clamping piece is arranged along the front-back direction, and one end of the deflection clamping piece is rotatably arranged in the rotation groove; the clamping head is arranged at the other end of the deflection clamping piece.
4. A back depth adjustment device according to claim 3, wherein: the deflection clamping piece is a horizontal plate-shaped piece, a U-shaped elastic holding ring is held at the outer ring of the deflection clamping piece, and the elastic holding ring is made of a metal elastic sheet; the elastic holding ring comprises elastic side strips which are respectively positioned on two sides of the deflection clamping piece, and the opening end of the elastic holding ring is close to the clamping head; the elastic embracing ring is configured to provide a reset elastic force after deflection for the deflection clamping piece.
5. The back depth adjustment device according to claim 4, wherein: and a limiting protrusion is arranged at the position between the two elastic side bars of the lower seat, and can be in butt fit with the elastic side bars.
6. The back depth adjustment device according to claim 1, wherein: the front end of the rack is provided with a first guiding inclined wall, and when the adjusting guide seat extends forwards from the rearmost position relative to the inside of the mounting seat, the first guiding inclined wall is configured to guide the clamping head to enter the groove channel on one side of the annular groove close to the one-way clamping groove.
7. The back depth adjustment device according to claim 1 or 6, wherein: the rear end of the rack is correspondingly provided with a second guiding inclined wall, and the second guiding inclined wall can guide the clamping head to enter the channel at the other side of the annular groove.
8. The back depth adjustment device according to claim 1, wherein: the side wall of one side of the rack, which is away from the back-off claw, is arranged straight, and the adjusting guide seat is reset backwards so that the clamping head slides along the side wall of the side of the rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320480393.5U CN219720235U (en) | 2023-03-08 | 2023-03-08 | Back depth adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320480393.5U CN219720235U (en) | 2023-03-08 | 2023-03-08 | Back depth adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219720235U true CN219720235U (en) | 2023-09-22 |
Family
ID=88032754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320480393.5U Active CN219720235U (en) | 2023-03-08 | 2023-03-08 | Back depth adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219720235U (en) |
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2023
- 2023-03-08 CN CN202320480393.5U patent/CN219720235U/en active Active
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| GR01 | Patent grant | ||
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