Adjustable pedal for learning chair

Abstract

The utility model belongs to the technical field of study chair pedals, and particularly relates to an adjustable pedal for a study chair, which comprises an inner tube and an outer tube, a pedal is arranged at the lower end of the inner tube, strip-shaped teeth are arranged on the outer side of one end of the inner tube along the moving direction of the inner tube, a movable plate is arranged on the outer side of the outer tube, and the movable plate is arranged on the outer side of the inner tube. A locking piece meshed with the strip-shaped teeth is further arranged on the outer pipe, and the locking piece is driven by the movable plate to be meshed with the strip-shaped teeth. The inner pipe and the outer pipe can be locked through matching of the locking piece and the strip-shaped teeth, meshing and separation of the locking piece and the strip-shaped teeth are controlled through the moving piece and the elastic body, movement of the moving plate is guaranteed through matching of the first long hole and the bolt, and the inner pipe and the outer pipe can be locked through matching of the spring and the strip-shaped teeth. According to the device, unlocking caused by automatic movement of the movable plate can be prevented, free adjustment of the position of the pedal can be effectively completed, operation is easy and convenient, the stability of a child in the sitting process is ensured, and the use requirement is effectively met.

Description

Technical Field

[0001] The utility model belongs to the technical field of footrests for study chairs, in particular to an adjustable footrest for study chairs. Background Art

[0002] The footrest of the learning chair is a component designed to facilitate school-age children to place their feet. It can provide support for the feet, prevent the feet of school-age children from hanging in the air, and improve the comfort of use.

[0003] However, the height of the footrest used in the prior art is fixed, resulting in poor support effects when used by school-age children of different heights, and some feet cannot even be effectively supported. Utility Model Content

[0004] In order to solve the technical problem that the above-mentioned footrest has poor functionality, the utility model proposes an adjustable footrest for a learning chair which has a reasonable design, a simple structure, is easy to process, and can effectively and freely adjust the position of the footrest. The operation is simple and convenient, and the needs of children of different heights can be met. The supporting effect is guaranteed, the stability of children while sitting is ensured, and the use needs can be effectively met.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is an adjustable footrest for a study chair, comprising an inner tube and an outer tube, a pedal is provided at the lower end of the inner tube, a bar tooth is provided on the outer side of one end of the inner tube along the direction of its own movement, a movable plate is provided on the outer side of the outer tube, and a locking piece engaged with the bar tooth is also provided on the outer tube, and the locking piece is driven by the movable plate to engage with the bar tooth.

[0006] Preferably, an elastic body is provided on the inner side of the movable plate, and the locking member is driven by the elastic body to separate from the bar teeth.

[0007] Preferably, the locking member is a plate-like structure, and one end thereof is tooth-shaped.

[0008] Preferably, the locking member is provided with a second long hole for accommodating the elastic body, and the elastic body is installed in the second long hole.

[0009] Preferably, the outer tube is provided with a cross groove for accommodating the locking piece and the elastomer respectively, one end of the cross groove penetrates the outer wall of the outer tube, and the middle of the other end penetrates the inner wall of the outer tube to form a through hole for one end of the locking piece to pass through.

[0010] Preferably, a groove for driving the locking member to engage with the bar teeth is provided on the movable plate corresponding to one end of the locking member.

[0011] Preferably, the movable plate is provided with a first long hole along its moving direction, a bolt for guiding the movement of the movable plate is arranged in the first long hole, and a screw hole for use with the bolt is arranged on the outer tube.

[0012] Preferably, the movable plate is provided with a driving plate for driving the movable plate to move.

[0013] Preferably, a fixing plate used in conjunction with the driving plate is provided on the outer tube, and a spring is provided between the driving plate and the fixing plate.

[0014] Preferably, a tension spring is provided between the inner tube and the outer tube.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] 1. The utility model provides an adjustable footrest for a learning chair. The inner and outer tubes can be locked by arranging a locking piece and a strip tooth. The engagement and separation of the locking piece and the strip tooth are controlled by arranging a moving piece and an elastic body. The first long hole is matched with a bolt to ensure the movement of the moving plate. The spring is provided to prevent the moving plate from automatically moving and causing unlocking. The utility model solves the problem that the footrest height used in the prior art is fixed, resulting in poor support effect when used by school-age children of different heights, and some feet cannot even be effectively supported. The device has a reasonable design, a simple structure, and is easy to process. It can effectively complete the free adjustment of the position of the footrest, is simple and convenient to operate, and can meet the use needs of children of different heights, ensure the support effect, ensure the stability of the child during sitting, and effectively meet the use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model in an embodiment;

[0019] Figure 2 It is a half-section schematic diagram of the utility model in an embodiment;

[0020] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0021] Figure 4This is a schematic diagram of the structure of the locking member and the cross groove in the embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the locking member and the elastic body in the embodiment of the utility model;

[0023] In the above figures: 1, outer tube; 2, pedal; 3, inner tube; 4, bar teeth; 5, movable plate; 6, bolt; 7, first long hole; 8, driving plate; 9, fixed plate; 10, spring; 11, tension spring; 12, hanging column; 13, locking piece; 14, elastic body; 15, cross groove; 16, through hole; 17, second long hole; 18, groove. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. 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.

[0025] 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 than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0026] Examples, such as Figure 1 to Figure 5 As shown, an adjustable footrest for a learning chair comprises an inner tube 3 and an outer tube 1, wherein the upper end of the outer tube 1 is fixedly connected to the bottom of the seat of the learning chair in the prior art, or the upper end of the outer tube 1 is detachably connected to the bottom of the seat through a connecting seat, so as to increase the functionality of the device and meet different usage requirements; further, a pedal 2 is provided at the lower end of the inner tube 3, and a bar tooth 4 is provided on the outer side of one end of the inner tube 3 along the direction of its own movement. Further, a groove for accommodating the bar tooth 4 is provided on one side of the inner tube 3, which is convenient for the installation of the bar tooth 4; a movable plate 5 is provided on the outer side of the outer tube 1, which is adjusted manually to provide convenient power input for the locking member 13 to achieve unlocking, and a locking member 13 meshing with the bar tooth 4 is also provided on the outer tube 1, and the locking member 13 is driven by the movable plate 5 to mesh with the bar tooth 4. The meshing between the locking member 13 and the bar tooth 4 ensures the stability of the inner tube 3 and the outer tube 1 after locking, which fully meets the usage requirements.

[0027] In order to effectively separate the locking piece 13 and the bar tooth 4, an elastic body 14 is provided on the inner side of the movable plate 5. The locking piece 13 is driven by the elastic body 14 to separate from the bar tooth 4, so as to unlock the inner tube 3 and facilitate the adjustment of the position between the inner tube 3 and the outer tube 1.

[0028] In order to effectively ensure the locking effect, the locking member 13 is a plate-shaped structure, and one end thereof is set in a tooth shape, which provides a prerequisite for the engagement of the locking member 13 with the bar teeth 4.

[0029] In order to achieve convenient placement of the locking member 13, a second long hole 17 for accommodating the elastomer 14 is provided on the locking member 13, and the elastomer 14 is installed in the second long hole 17. The elastomer 14 set in this embodiment is elliptical, and it can also be U-shaped or wavy. The device is reasonably set up and has strong functionality.

[0030] In order to facilitate the placement of various equipment components and improve the stability of the equipment structure, a cross groove 15 is provided on the outer tube 1 for accommodating the locking member 13 and the elastomer 14 respectively. One end of the cross groove 15 penetrates the outer wall of the outer tube 1, and the middle of the other end penetrates the inner wall of the outer tube 1 to form a through hole 16 for one end of the locking member 13 to pass through. In other words: the cross groove 15 provides convenient conditions for the vertical placement of the elastomer 14 and the same moving direction as the movable plate 5. On the other hand, it facilitates the placement of the locking member 13 perpendicular to the bar tooth 4 to ensure the use requirements. The establishment of the through hole 16 facilitates the extension of the locking member 13 to complete the cooperation with the bar tooth 4, thereby improving the functionality of the device.

[0031] In order to ensure the rationality of the equipment, a groove 18 for driving the locking member 13 to engage with the bar tooth 4 is provided on the movable plate 5 corresponding to one end of the locking member 13. The longitudinal section of the groove 18 is a right-angled trapezoid. The groove 18 is driven to move by the movement of the movable plate 5, thereby changing the matching position of the groove 18 and the locking member 13, especially changing the compression of the elastic body 14 at the inner side wall of the groove 18, thereby driving the locking member 13 to engage with the bar tooth 4.

[0032] In order to effectively complete the stable placement of the position where the movable plate 5 is established and provide convenient conditions for the subsequent relative adjustment of the positions of the inner tube 3 and the outer tube 1, a first long hole 7 is opened on the movable plate 5 along its own moving direction, and a bolt 6 is arranged in the first long hole 7 to guide the movement of the movable plate 5, and a screw hole used in conjunction with the bolt 6 is arranged on the outer tube 1. That is to say, the bolt 6 can prevent the movable plate 5 from detaching from the outer tube 1, but cannot hinder the movable plate 5 from moving on the outer tube 1, which ensures that the device can be moved and adjusted, and also has good stability, fully meeting the use requirements. Further: the end face of one side of the movable plate 5 that is in contact with the outer tube 1 is designed in an arc shape, so that it can not only perfectly fit with the outer tube 1, but also provide a certain guiding effect for the movement of the movable plate 5.

[0033] In order to facilitate the adjustment of the position of the movable plate 5, a driving plate 8 is provided on the movable plate 5 for driving itself to move. The driving plate 8 can also be formed by folding one end of the movable plate 5, or it can be a separate component fixedly connected to the movable plate 5, etc. The former can save costs to a certain extent, and the latter provides convenience for the disassembly, assembly and maintenance of the equipment to meet different usage requirements.

[0034] In order to improve the rationality of the device, a fixed plate 9 is provided on the outer tube 1 for use with the driving plate 8, and a spring 10 is provided between the driving plate 8 and the fixed plate 9. The spring 10 connects the driving plate 8 and the fixed plate 9 together. Specifically, the spring 10 uses its own compression force after being compressed to drive the movable plate 5 away from the fixed plate 9, and the elastic force of the spring 10 is greater than the elastic force of the elastic body 14. In this way, it can be ensured that the force provided by the spring 10 can drive the movable plate 5 to move and overcome the elastic force of the elastic body 14 to drive the locking member 13 to engage with the bar tooth 4.

[0035] In order to ensure the stability between the inner tube 3 and the outer tube 1 and ensure that the pedal can be freely retracted, a tension spring 11 is arranged between the inner tube 3 and the outer tube 1, wherein the tension spring 11 is arranged on the inner side of the inner tube 3 and the outer tube 1, and the specific function of the tension spring 11 is that the inner tube 3 and the outer tube 1 can be driven to retract into the outer tube 1, which is further described as follows: hanging columns 12 are arranged on the inner sides of the inner tube 3 and the outer tube 1, and the two ends of the tension spring 11 are respectively hung on the hanging columns 12 to connect the inner tube 3 and the outer tube 1 together to ensure that it has good use function.

[0036] During the above process: when in use, first drive the movable plate 5 to move toward the fixed plate 9, and compress the spring 10, and the groove 18 gradually moves upward, so that the locking piece 13 gradually moves into the groove 18 under the push of the elastic body 14, and separates it from the bar tooth 4, releasing the lock of the inner tube 3 and the outer tube 1. When it is necessary to adjust the pedal 2 upward, the tension spring 11 drives the inner tube 3 to retract into the outer tube 1, or when adjusting the pedal 2 downward, the inner tube 3 is moved downward. When it moves to the appropriate position, release the movable plate 5 or the driving plate 8, and the spring 10 drives the movable plate 5 to reset. The inclined surface of the groove 18 drives the locking piece 13 to overcome the elastic body 14 and press on the locking piece 13, and makes its lower end mesh with the bar tooth 4 again, thereby achieving the locking of the inner tube 3 and the outer tube 1.

[0037] The utility model can lock the inner and outer tubes 1 by setting the locking piece 13 and the strip teeth 4, and can control the meshing and separation of the locking piece 13 and the strip teeth 4 by setting the moving piece and the elastic body 14. The first long hole 7 cooperates with the bolt 6 to ensure the movement of the moving plate 5. The spring 10 can prevent the moving plate 5 from automatically moving and causing unlocking. The utility model solves the problem that the footrest height used in the prior art is fixed, resulting in poor support effect when used by school-age children of different heights, and some feet cannot even be effectively supported. The device has a reasonable design, a simple structure, and is easy to process. It can effectively complete the free adjustment of the position of the footrest, is simple and convenient to operate, can meet the use needs of children of different heights, ensure the support effect, ensure the stability of the child during sitting, and effectively meet the use needs.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An adjustable footrest for a study chair, comprising an inner tube and an outer tube, wherein a pedal is provided at the lower end of the inner tube, characterized in that: A bar tooth is arranged on the outer side of one end of the inner tube along the direction of its own movement, a movable plate is arranged on the outer side of the outer tube, and a locking piece meshing with the bar tooth is also arranged on the outer tube, and the locking piece is driven by the movable plate to mesh with the bar tooth.

2. The adjustable footrest for a study chair according to claim 1, characterized in that: An elastic body is arranged on the inner side of the movable plate, and the locking piece is driven by the elastic body to separate from the bar teeth.

3. An adjustable footrest for a study chair according to claim 1 or 2, characterized in that: The locking piece is a plate-shaped structure, and one end of the locking piece is tooth-shaped.

4. The adjustable footrest for a study chair according to claim 3, characterized in that: The locking piece is provided with a second long hole for accommodating the elastic body, and the elastic body is installed in the second long hole.

5. The adjustable footrest for a study chair according to claim 4, characterized in that: The outer tube is provided with a cross groove for accommodating the locking piece and the elastic body respectively. One end of the cross groove penetrates the outer wall of the outer tube, and the middle of the other end penetrates the inner wall of the outer tube to form a through hole for one end of the locking piece to pass through.

6. The adjustable footrest for a study chair according to claim 5, characterized in that: A groove for driving the locking member to engage with the bar teeth is arranged on the moving plate corresponding to one end of the locking member.

7. The adjustable footrest for a study chair according to claim 6, characterized in that: The movable plate is provided with a first long hole at its upper edge in its moving direction, a bolt for guiding the movement of the movable plate is arranged in the first long hole, and a screw hole used in conjunction with the bolt is arranged on the outer tube.

8. An adjustable footrest for a study chair according to any one of claims 1, 2, 4-7, characterized in that: The movable plate is provided with a driving plate for driving the movable plate to move.

9. The adjustable footrest for a study chair according to claim 8, characterized in that: The outer tube is provided with a fixing plate used in conjunction with the driving plate, and a spring is provided between the driving plate and the fixing plate.

10. An adjustable footrest for a study chair according to any one of claims 1, 2, 4-7, and 9, characterized in that: A tension spring is arranged between the inner tube and the outer tube.

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