CN112937393B - Backrest framework - Google Patents
Backrest framework Download PDFInfo
- Publication number
- CN112937393B CN112937393B CN202110351581.3A CN202110351581A CN112937393B CN 112937393 B CN112937393 B CN 112937393B CN 202110351581 A CN202110351581 A CN 202110351581A CN 112937393 B CN112937393 B CN 112937393B
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- Prior art keywords
- backboard
- plate
- support plate
- gear
- waist support
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/68—Seat frames
- B60N2/686—Panel like structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/64—Back-rests or cushions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
Abstract
The invention discloses a backrest framework, which comprises a front backboard and a rear backboard which are oppositely arranged in front and back, wherein a window is formed in the middle of the front backboard so as to be in a frame shape, and a frame strip of the front backboard is abutted against the front side surface of the rear backboard and is in snap fit with the front backboard and the rear backboard; the middle sections of the frame strips on the two sides of the front backboard are separated from the corresponding side edges of the rear backboard, so that two movable guide cavities are formed, a waist supporting plate is arranged in the window area, the waist supporting plate is positioned in the vertical plane and horizontally extends, the two ends of the waist supporting plate respectively extend into the corresponding movable guide cavities, and a self-positioning mechanism is arranged between the waist supporting plate and the movable guide cavities. The invention has the beneficial effects that: the middle part of the waist supporting plate is exposed out of the window on the front backboard to play a supporting role, the sliding positioning structure between the waist supporting plate and the backboard component is in a hidden state, and the sliding positioning structure is positioned in multiple steps in the range of travel, is convenient to use, easy to assemble, neat in appearance and good in integrity.
Description
Technical Field
The invention belongs to the technical field of seat structures, and particularly relates to a backrest framework.
Background
Foam and a facing are often covered on the back frame to enhance its comfort. In order to meet the demands of partial users, the backrest framework is also provided with a waist support for providing support for the waist of a seated person, so that the support is further improved, and the fatigue is relieved. But in order to improve the universality of the seat and meet the use requirements of users with different heights and shapes, the waist support needs to have a lifting adjusting function. The prior art discloses some waist supports which rely on an electrically driven lifting mechanism for adjustment, however, the structure is relatively complex. The chinese patent publication No. CN209660969U discloses a seat, including chassis and back framework, wherein be equipped with soft back in the framework, be connected with the support of L type between chassis and the back framework, this support of L type has vertical portion and horizontal portion, wherein horizontal portion connects in the chassis, set up the arc supporter that two horizontal directions extend in the vertical portion, arc supporter both ends are connected with the framework respectively, set up the sliding tray on the vertical portion, the waist holds in the palm the setting in back rear side, the rear side that the waist held in the palm is connected with the sliding tray through adjusting part, in order to realize the upper and lower regulation of waist support. However, such a lumbar support is inconvenient to adjust up and down, and the seat is not attractive.
Disclosure of Invention
In view of this, the present invention provides a back frame.
The technical scheme is as follows:
the backrest framework is characterized by comprising a front backboard and a rear backboard which are oppositely arranged in front and back;
the shape of the front backboard is adapted to that of the rear backboard, a window is formed in the middle of the front backboard so as to be in a frame shape, a frame strip of the front backboard is attached to the front side surface of the rear backboard, and at least two inserting and hanging structures and a non-return structure are arranged between the frame strip of the front backboard and the rear backboard so as to enable the front backboard and the rear backboard to be in snap fit;
the middle sections of the frame strips at the two sides of the front backboard are separated from the corresponding side edges of the rear backboard, so that two moving guide cavities are formed, the two sides of each moving guide cavity are opened, and the inner side of each moving guide cavity is opened towards the window;
the window area is provided with a waist supporting plate which is positioned in the vertical plane and horizontally extends, two ends of the waist supporting plate respectively extend into the corresponding movable guide cavity, and a self-positioning mechanism is arranged between the waist supporting plate and the movable guide cavity.
As a preferred technical solution, the above-mentioned inserting and hanging structure includes inserting blocks and hanging holes, wherein the inserting blocks are fixedly arranged on the rear side surface of the front backboard, the front ends of all the inserting blocks face the same direction, the hanging Kong Kaishe is arranged on the rear backboard, the hanging holes are in one-to-one correspondence with the inserting blocks, the hanging holes have openings facing the inserting blocks, and the inserting blocks are inserted in the corresponding hanging holes;
the non-return structure is a front backboard step and a back backboard step which are opposite to each other, and the front backboard step and the back backboard step are mutually abutted to prevent the insertion block from exiting from the corresponding hanging hole.
As a preferable technical scheme, at least one insert block is respectively arranged on the upper frame strip, the lower frame strip and the two side frame strips of the front backboard, and the front end of the insert block is downward;
the back plate front side corresponds every the inserted block is fixed respectively and is provided with the trough plate, the notch of trough plate is backward, the one end opening of trough plate upwards, the both sides cell wall of trough plate with back plate front side fixed connection to enclose with the back plate the hanging hole.
As a preferable technical scheme, the self-positioning mechanism comprises a group of gear blocks which are arranged in the moving guide cavity at intervals, wherein the gear blocks are vertically distributed along the moving guide cavity, and the gear blocks are connected with the inner wall of the moving guide cavity;
the waist support plate is provided with a positioning block, the positioning block moves along the gear block, the positioning block is in elastic interference fit with the gear block, the waist support plate is moved when the positioning block slides relative to the gear block, and the waist support plate is positioned when the positioning block is clamped between any two adjacent gear blocks.
As a preferable technical solution, the above-mentioned waist support plate is fixedly connected with an L-shaped bending plate, the bending plate includes a vertical portion vertically disposed on a front side of an end portion of the waist support plate, a rear side edge of the vertical portion is fixedly connected with the end portion of the waist support plate, a front side edge of the vertical portion is connected with a parallel portion parallel to the front side of the end portion of the waist support plate, and one side edge of the parallel portion is connected with the front side edge of the vertical portion to form a chute with a lateral opening with the end portion of the waist support plate;
the length of the sliding groove is larger than the distance between any two adjacent gear blocks, the toothed gear blocks are arranged between the groove walls on two sides of the sliding groove, the root parts of the gear blocks are connected with the inner wall on the front side of the moving guide cavity, and the tops of the gear blocks extend into the sliding groove and are clung to the groove walls on two sides of the sliding groove;
the middle part of the inner side surface of the parallel part protrudes between the gear blocks to form the positioning block.
As the preferable technical scheme, the notch of the chute faces the waist support adjusting area, and the top of the gear block extends outwards to the position between the two side groove walls of the chute.
As the preferable technical scheme, the gear block comprises a toothed gear plate, the plate surface of the gear plate faces towards the front-back direction, the root of the gear plate is connected with the front wall of the moving guide cavity, the top of the gear plate extends backwards and then continues to extend outwards, and a reinforcing block is integrally formed between the edge of the gear plate and the front wall of the moving guide cavity.
As a preferable technical scheme, the middle sections of the frame strips at the two sides of the front backboard are both offset forwards to form a protruding section, and the protruding section is separated from the corresponding side edge of the rear backboard so as to form the moving guide cavity;
the top and the bottom of each movable guide cavity are respectively provided with one inserting and hanging structure;
the top of the movable guide cavity is also fixedly provided with a stop block, and the stop block is vertically arranged on the front side surface of the back plate and extends out towards the protruding section.
As a preferable technical scheme, the horizontal section of the rear backboard is in an arc shape protruding backwards;
the waist support plate comprises a strip-shaped support plate, the support plate and the rear back plate are mutually separated to form a crescent separation area, two ends of the support plate are respectively connected with strip-shaped positioning plates, the inner ends of the positioning plates are connected with the support plate, the outer ends of the positioning plates extend outwards and forwards horizontally along the front side surface of the rear back plate, and the outer ends of the positioning plates extend into corresponding movable guide cavities and are connected with adjusting handles after extending out of the outer openings of the corresponding movable guide cavities.
As a preferable technical scheme, front side surfaces at two ends of the supporting plate respectively deviate backwards to form first connecting parts, rear side surfaces at the inner ends of the positioning plates respectively correspond to the first connecting parts and are thinned to form second connecting parts, the second connecting parts are abutted to the first connecting parts and riveted with the first connecting parts, and front side surfaces of the second connecting parts are flush with front side surfaces of the supporting plate;
the rear side surface of the second connecting part is connected with a riveting column which penetrates into the corresponding first connecting part to rivet the first connecting part and the second connecting part;
the positioning plate is integrally formed with the bending plate.
Compared with the prior art, the invention has the beneficial effects that: set up slip regulation and location structure between waist layer board and the front bezel to the backplate subassembly that forms after front bezel and the backplate equipment carries out spacingly to the waist to hold in the palm, and the window on the front bezel exposes in waist layer board middle part, and slip location structure between waist layer board and the backplate subassembly is in hidden state, and the waist layer board can self-align, and the multispeed location in the range of travel, convenient to use easily assembles, and the outward appearance is clean and tidy, and the wholeness is good.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view of the A-A of FIG. 1;
FIG. 3 is an enlarged view of portion a of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 5 is a cross-sectional view of FIG. 1C-C;
FIG. 6 is an enlarged view of portion b of FIG. 5;
FIG. 7 is an enlarged view of section c of FIG. 1;
FIG. 8 is a left side view of FIG. 1;
FIG. 9 is a schematic view of the structure of the front backboard;
FIG. 10 is a rear view of FIG. 9;
FIG. 11 is a schematic view of the structure of the rear plate;
fig. 12 is a schematic view of the structure of the waist support plate;
FIG. 13 is a top view of FIG. 12;
fig. 14 is a sectional view D-D of fig. 13.
Detailed Description
The invention is further described below with reference to examples and figures.
As shown in fig. 1 to 8, a back frame includes a front backboard 200 and a rear backboard 100 which are disposed opposite to each other in front and rear. The horizontal section of the back plate 100 is in a shape of a rearward protruding arc, so that it is adapted to the shape of the back of the human body and is ergonomic. The shape of the front backboard 200 is adapted to that of the rear backboard 100, a window 220 is formed in the middle of the front backboard 200, a frame strip of the front backboard 200 is attached to the front side surface of the rear backboard 100, and at least two hanging structures and non-return structures are arranged between the frame strip of the front backboard 200 and the rear backboard 100 so as to enable the front backboard 200 and the rear backboard 100 to be in snap fit.
As shown in fig. 1 and 5, the middle sections of the two side frame strips of the front backboard 200 are separated from the corresponding side edges of the rear backboard 100, so that two moving guide cavities 400 are formed, the moving guide cavities 400 are opened at two sides, and the inner sides of the moving guide cavities are opened towards the window 220. The window 220 area forms a waist support adjusting area, a waist support plate 300 is arranged in the waist support adjusting area, the waist support plate 300 is positioned in a vertical plane and horizontally extends, two ends of the waist support plate 300 respectively extend into the corresponding moving guide cavity 400, and a self-positioning mechanism is arranged between the waist support plate 300 and the moving guide cavity 400.
As shown in fig. 2, 3 and 8, the middle sections of the two side frame bars of the front backboard 200 are each offset forward to form a protruding section, and the protruding section is separated from the corresponding side of the rear backboard 100, thereby forming the movement guide chamber 400. The top and bottom of each of the moving guide chambers 400 are respectively provided with one of the insertion and hanging structures. The top of the movement guide chamber 400 is also fixedly provided with a stopper 104, and the stopper 104 stands on the front side of the rear chassis 100 and protrudes toward the protruding section, so as to prevent the rear chassis 100 from being separated from the front chassis 200 due to an upward impact when the waist support plate 300 slides upward.
As shown in fig. 2 and 4, the inserting and hanging structure includes an inserting block 201 and hanging holes 101, wherein the inserting block 201 is fixedly disposed on the rear side of the front backboard 200, the front end of the inserting block is downward, the hanging holes 101 are formed on the rear backboard 100, the hanging holes 101 are in one-to-one correspondence with the inserting block 201, and the hanging holes 101 have upward openings. The non-return structure is a front back plate step 202 and a back plate step 102 that are opposite to each other. The insert 201 is inserted into the corresponding hanging hole 101, and the front backboard step 202 and the rear backboard step 102 abut against each other to prevent the insert 201 from being withdrawn from the corresponding hanging hole 101.
As shown in fig. 9 and 10, at least one insert 201 is disposed on each of the upper frame, the lower frame, and the two side frame of the front backboard 200. As shown in fig. 11, the front side of the back plate 100 is fixedly provided with a slot plate 103 corresponding to each insert block 201, the slot opening of the slot plate 103 is backward, one end of the slot plate 103 is opened upward, and two side slot walls of the slot plate 103 are fixedly connected with the front side of the back plate 100, so as to form the hanging hole 101 with the back plate 100.
As shown in fig. 10, the insert 201 includes an insert 201a, the cross section of the insert 201a is L-shaped, the insert 201a includes a relief extension portion standing on the rear side of the front backplate 200, the front edge of the relief extension portion is connected with the front backplate 200, the rear edge of the relief extension portion extends backward and is connected with an inserting portion, the inserting portion is vertically disposed, the upper edge of the inserting portion is connected with the relief extension portion, and the lower edge of the inserting portion extends downward to form the front end of the insert 201. The front end of the plug-in portion extends downward and is deflected backward so that the plug 201 enters the hanging hole 101 during assembly. A first reinforcing rib 201b is connected between the rear side of the insert plate 201a and the front backplate 200 to improve the strength thereof. The front backplate 200 opposite to the plugging portion is provided with a relief hole 203, so as to facilitate the integral formation of the plug 201 and the front backplate 200.
As shown in fig. 4 and 10, the rear side of the upper frame strip of the front backboard 200 is provided with one front backboard step 202 near both ends thereof, respectively, and the front backboard step 202 is downward. The rear side of the front backplate 200 is protruded backwards at the position corresponding to the rear backplate step 102 to form the front backplate step 202, a U-shaped reinforcing rib 204 is arranged around the front backplate step 202, the opening of the U-shaped reinforcing rib 204 is downward, the front backplate 200 between the U-shaped reinforcing rib 204 and the front backplate step 202 forms a thinned part, the rear side of the thinned part is gradually deviated from bottom to top to enable the thinned part to be thinned, and a deformation joint is formed between the upper edge of the thinned part and the U-shaped reinforcing rib 204, so that a local area where the front backplate step 202 is located has a certain elastic deformation capability, and the two parts can be stably matched when being abutted by the rear backplate step 202.
Referring to fig. 2 and 11, the front side of the back plate 100 is provided with an upward back plate step 102 corresponding to the front plate step 202. The rear plate step 102 is disposed on the upper portion of the rear plate 100, the rear plate step 102 includes a retaining plate 102a standing on the front side of the rear plate 100, any one side of the retaining plate 102a faces downward, and a second reinforcing rib 102b is connected between the upper surface of the retaining plate 102a and the rear plate 100. The second reinforcing ribs 102b are vertically arranged and horizontally distributed along the retaining plate 102 a.
Referring to fig. 2, 3, 6 and 7, the self-positioning mechanism includes a set of gear blocks 210 disposed in the moving guiding cavity 400 at intervals, the gear blocks 210 are vertically distributed along the moving guiding cavity 400, and the gear blocks 210 are connected with the inner wall of the moving guiding cavity 400.
The waist support plate 300 is provided with a positioning block 302, the positioning block 302 moves along the gear block 210, the positioning block 302 is in elastic interference fit with the gear block 210, the waist support plate 300 is moved when the positioning block 302 slides relative to the gear block 210, and the waist support plate 300 is positioned when the positioning block 302 is clamped between any two adjacent gear blocks 210.
Referring to fig. 6, 7 and 12, the waist support plate 300 is fixedly connected with an L-shaped bending plate 301, the bending plate 301 includes a vertical portion vertically disposed on a front side of an end portion of the waist support plate 300, a rear side edge of the vertical portion is fixedly connected with the end portion of the waist support plate 300, a front side edge of the vertical portion is connected with a parallel portion parallel to the front side of the end portion of the waist support plate 300, and one side edge of the parallel portion is connected with the front side edge of the vertical portion to form a chute with a lateral opening between the front side edge of the waist support plate 300 and the end portion of the waist support plate. A reinforcing rib 303 is provided between the outer side surface of the vertical portion and the end of the waist support plate 300.
As shown in fig. 3 and 7, the length of the sliding groove is greater than the distance between any two adjacent gear blocks 210, tooth-shaped gear blocks 210 are disposed between two side groove walls of the sliding groove, the root of each gear block 210 is connected with the front side inner wall of the moving guiding cavity 400, and the top of each gear block 210 extends into the sliding groove and abuts against two side groove walls of the sliding groove. The middle part of the inner side surface of the parallel part protrudes between the gear blocks 210 to form the positioning block 302.
In the present embodiment, as shown in fig. 5 and 12, the notch of the chute faces the lumbar support adjusting area, and the top of the gear block 210 extends outwards to a position between two side walls of the chute. The notches of the two sliding grooves are opposite to each other and cooperate with the corresponding gear block 210 to limit the waist support plate 300 in the left-right direction.
As shown in fig. 6 and 7, a sliding limiting area is formed between each group of gear blocks 210 and the front wall of the movement guiding cavity 400, and the parallel portion of the bending plate 301 is located in the corresponding sliding limiting area, so as to help keep the sliding stability of the waist support plate 300 relative to the front backboard 200.
As shown in fig. 7, the gear block 210 includes a toothed gear plate 211, the plate surface of the gear plate 211 faces in the front-rear direction, the root of the gear plate 211 is connected with the front wall of the moving guide cavity 400, the top of the gear plate 211 extends backward and continues to extend outward, and a reinforcing block 212 is integrally formed between the edge of the gear plate 211 and the front wall of the moving guide cavity 400. Through holes 230 are respectively formed in the protruding sections corresponding to each gear block 210, so as to facilitate molding and demolding of the front backboard 200, and meanwhile, local rigidity is weakened, so that the positioning blocks 302 can slide through the gear blocks 210.
Referring to fig. 5 and 12-14, the waist support plate 300 includes a bar-shaped support plate 310, the support plate 310 is substantially in a straight plate shape, the support plate 310 and the rear plate 100 are separated from each other to form a crescent-shaped separation region, two ends of the support plate 310 are respectively connected with a bar-shaped positioning plate 320, an inner end of the positioning plate 320 is connected with the support plate 310, an outer end of the positioning plate 320 extends horizontally outwards and forwards along a front side of the rear plate 100, and an outer end of the positioning plate 320 extends into the corresponding moving guide cavity 400 and extends out of an outer opening thereof to be connected with an adjusting handle 330.
As shown in fig. 14, front sides of two ends of the supporting plate 310 are respectively offset backward to form first connection portions 311, rear sides of inner ends of the positioning plates 320 are respectively thinned corresponding to the first connection portions 311 to form second connection portions 321, the second connection portions 321 are abutted against the first connection portions 311 and riveted with the same, and front sides of the second connection portions 321 are flush with front sides of the supporting plate 310.
The rear side of the second connecting portion 321 is connected with a rivet 322, and the rivet 322 penetrates into the corresponding first connecting portion 311 to rivet the first connecting portion 311 and the second connecting portion 321. The bending plate 301 is integrally formed on the positioning plate 320.
The sliding grooves at both ends of the waist support plate 300 are clamped on the corresponding gear blocks 210, and are assembled with the front backboard 200 into a whole, and then the front backboard 200 and the rear backboard 100 are clamped and assembled. After the assembly is completed, a coating is mounted on the back plate assembly, and an adjusting seam is reserved at the position of the coating corresponding to the outer opening of the moving guide cavity 400, so that the waist support plate 300 leaks out. When the user needs to adjust the height of the waist support, the user can conveniently adjust the height of the waist support 300 by holding the adjusting handle 330.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A back frame, characterized in that: comprises a front backboard (200) and a rear backboard (100) which are oppositely arranged at front and back;
the shape of the front backboard (200) is adapted to that of the rear backboard (100), a window (220) is formed in the middle of the front backboard (200) so as to be in a frame shape, a frame strip of the front backboard (200) is attached to the front side surface of the rear backboard (100), and at least two inserting and hanging structures and a non-return structure are arranged between the frame strip of the front backboard (200) and the rear backboard (100) so as to enable the front backboard (200) and the rear backboard (100) to be in snap fit;
the middle sections of the two side frame strips of the front backboard (200) are separated from the corresponding side edges of the rear backboard (100) so as to form two moving guide cavities (400), two sides of each moving guide cavity (400) are opened, and the inner side of each moving guide cavity is opened towards the window (220);
the window (220) area is provided with a waist support plate (300), the waist support plate (300) is positioned in a vertical plane and horizontally extends, two ends of the waist support plate respectively extend into the corresponding moving guide cavity (400), and a self-positioning mechanism is arranged between the waist support plate (300) and the moving guide cavity (400);
the self-positioning mechanism comprises a group of gear blocks (210) which are arranged in the moving guide cavity (400) at intervals, the gear blocks (210) are vertically distributed along the moving guide cavity (400), and the gear blocks (210) are connected with the inner wall of the moving guide cavity (400);
the waist support plate (300) is provided with a positioning block (302), the positioning block (302) moves along the gear block (210), the positioning block (302) is in elastic interference fit with the gear block (210), the positioning block (302) moves the waist support plate (300) when sliding relative to the gear block (210), and the positioning block (302) is clamped between any two adjacent gear blocks (210) to position the waist support plate (300);
the middle sections of the two side frame strips of the front backboard (200) are respectively offset forwards to form a protruding section, and the protruding section is separated from the corresponding side edge of the rear backboard (100) so as to form the moving guide cavity (400);
the top and the bottom of each movable guiding cavity (400) are respectively provided with one inserting and hanging structure;
the top of the movable guide cavity (400) is fixedly provided with a stop block (104), and the stop block (104) is vertically arranged on the front side surface of the rear backboard (100) and extends out towards the protruding section;
the back plate assembly formed by assembling the front back plate (200) and the back plate (100) limits the waist support plate (300), and the middle part of the waist support plate (300) is exposed from a window on the front back plate (200);
the inserting and hanging structure comprises inserting blocks (201) and hanging holes (101), wherein the inserting blocks (201) are fixedly arranged on the rear side face of the front backboard (200), the front ends of all the inserting blocks (201) face towards the same hanging holes (101) and are arranged on the rear backboard (100), the hanging holes (101) are in one-to-one correspondence with the inserting blocks (201), the hanging holes (101) are provided with openings facing the inserting blocks (201), and the inserting blocks (201) are inserted into the corresponding hanging holes (101);
the non-return structure is a front backboard step (202) and a back backboard step (102) which are opposite to each other, and the front backboard step (202) and the back backboard step (102) are abutted against each other so as to prevent the insert block (201) from withdrawing from the corresponding hanging hole (101).
2. A back frame according to claim 1, wherein: at least one insert block (201) is respectively arranged on the upper frame strip, the lower frame strip and the two side frame strips of the front backboard (200), and the front end of the insert block (201) is downward;
the front side of the backboard (100) is fixedly provided with a groove plate (103) corresponding to each inserting block (201), the notch of the groove plate (103) is backward, one end of the groove plate (103) is opened upwards, two side groove walls of the groove plate (103) are fixedly connected with the front side of the backboard (100), and accordingly the groove plate and the backboard (100) enclose a hanging hole (101).
3. A back frame according to claim 1, wherein: the waist support plate (300) is fixedly connected with an L-shaped bending plate (301), the bending plate (301) comprises a vertical part vertically arranged on the front side surface of the end part of the waist support plate (300), the rear side edge of the vertical part is fixedly connected with the end part of the waist support plate (300), the front side edge of the vertical part is connected with a parallel part, the parallel part is parallel to the front side surface of the end part of the waist support plate (300), and one side edge of the parallel part is connected with the front side edge of the vertical part to form a chute with a lateral opening with the end part of the waist support plate (300);
the length of the sliding groove is larger than the distance between any two adjacent gear blocks (210), the gear blocks (210) are arranged between the two side groove walls of the sliding groove, the root parts of the gear blocks (210) are connected with the front side inner wall of the movable guide cavity (400), and the top parts of the gear blocks (210) extend into the sliding groove and are abutted against the two side groove walls of the sliding groove;
the middle part of the inner side surface of the parallel part protrudes between the gear blocks (210) to form the positioning block (302).
4. A back frame according to claim 3, wherein: the notch of the chute faces the window (220), and the top of the gear block (210) extends outwards to a position between two side groove walls of the chute.
5. A back frame according to claim 3, wherein: the gear block (210) comprises a toothed gear plate (211), the plate surface of the gear plate (211) faces towards the front-back direction, the root of the gear plate (211) is connected with the front wall of the moving guide cavity (400), the top of the gear plate (211) extends backwards and then continues to extend outwards, and a reinforcing block (212) is integrally formed between the edge of the gear plate (211) and the front wall of the moving guide cavity (400).
6. A back frame according to claim 5, wherein: the horizontal section of the back plate (100) is in a shape of an arc protruding backwards;
the waist support plate (300) comprises a strip-shaped support plate (310), wherein the support plate (310) and the rear back plate (100) are mutually separated to form a crescent separation area, two ends of the support plate (310) are respectively connected with strip-shaped positioning plates (320), the inner ends of the positioning plates (320) are connected with the support plate (310), the outer ends of the positioning plates (320) horizontally extend outwards and forwards along the front side surface of the rear back plate (100), and the outer ends of the positioning plates (320) extend into corresponding movable guide cavities (400) and are connected with adjusting handles (330) after extending out of outer openings of the corresponding movable guide cavities.
7. A back frame according to claim 6, wherein: front side surfaces at two ends of the supporting plate (310) respectively deviate backwards to form first connecting parts (311), rear side surfaces at the inner ends of the positioning plates (320) respectively correspond to the first connecting parts (311) and are thinned to form second connecting parts (321), the second connecting parts (321) are abutted against the first connecting parts (311) and riveted with the first connecting parts, and front side surfaces of the second connecting parts (321) are flush with front side surfaces of the supporting plate (310);
the rear side surface of the second connecting part (321) is connected with a riveting column (322), and the riveting column (322) penetrates into the corresponding first connecting part (311) to rivet the first connecting part (311) and the second connecting part (321);
the bending plate (301) is integrally formed on the positioning plate (320).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110351581.3A CN112937393B (en) | 2021-03-31 | 2021-03-31 | Backrest framework |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110351581.3A CN112937393B (en) | 2021-03-31 | 2021-03-31 | Backrest framework |
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| Publication Number | Publication Date |
|---|---|
| CN112937393A CN112937393A (en) | 2021-06-11 |
| CN112937393B true CN112937393B (en) | 2023-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110351581.3A Active CN112937393B (en) | 2021-03-31 | 2021-03-31 | Backrest framework |
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| CN (1) | CN112937393B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204273919U (en) * | 2014-11-24 | 2015-04-22 | 杭州博志家具设计有限公司 | A kind of lifting regulation mechanism of back of child growth chair |
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