Leg support driving structure of teaching seat

Abstract

The utility model provides a leg support driving structure of a teaching seat, and belongs to the technical field of teaching seats. The leg support driving structure comprises a mounting plate arranged at the bottom of the seat surface of the teaching seat, a linear reciprocating driving part is arranged at the bottom of the mounting plate, the left side of the bottom of the mounting plate is hinged to one end of a hinge rod, the other end of the hinge rod is hinged to the right side of the bottom of a leg support, and an angle driving part is arranged between the linear reciprocating driving part and the leg support. According to the leg support driving structure, the two-stage leg support driving part is composed of the mounting plate, the linear reciprocating driving part and the angle driving part, in the using process, after first-stage folding is carried out through the angle driving part, second-stage folding can be carried out through the linear reciprocating driving part, and compared with an existing leg support folding structure, the leg support driving structure can increase the folding angle of a leg support, so that the leg support is more convenient to fold. The legs of the student are prevented from being hindered in the using process, the using comfort is improved, and the using convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching chairs, in particular to a leg support driving structure of a teaching chair. Background Art

[0002] As an important tool for students to learn, the comfort and functionality of teaching chairs are attracting more and more attention. However, there is a common problem with existing teaching chairs, that is, the lack of a leg rest structure. When students sit and study for a long time, their legs are prone to fatigue. In order to solve this problem, some chair products with leg rests have appeared on the market, including retractable leg rests or foldable leg rests, but there are also obvious shortcomings.

[0003] The structure of the telescopic leg rest is relatively complex, and it requires the coordination of multiple parts to achieve the telescopic function, which not only increases the manufacturing cost, but also increases the difficulty of maintenance. In addition, the carrying capacity of the telescopic leg rest is limited, and it is easy to be damaged during long-term use. Although the folding leg rest has a higher carrying capacity than the telescopic leg rest, most of the folding leg rests are fixed structures, which means that during the folding process, the leg rest can only be folded to about 90 degrees. As a result, during use, the folded leg rest will hinder the movement of the students' legs, causing inconvenience to use. Utility Model Content

[0004] In order to make up for the above deficiencies, the utility model provides a leg support driving structure of a teaching chair, which is used to solve the above problems.

[0005] The utility model is achieved in this way:

[0006] A leg rest driving structure of a teaching chair is arranged at the bottom of a seat surface of the teaching chair, a mounting plate is provided at the bottom of the seat surface, a sliding slot is provided at the bottom of the mounting plate, a linear reciprocating driving member is provided at the sliding slot, the bottom left side of the mounting plate is hinged to one end of the hinged rod, the other end of the hinged rod is hinged to the bottom right side of the leg rest, an angle driving member is provided between the linear reciprocating driving member and the leg rest, one end of the angle driving member is hinged to the bottom right side of the leg rest, the other end of the angle driving member is hinged to the reciprocating moving part of the linear reciprocating driving member, a controller is provided inside the mounting plate, a switch a and a switch b are arranged side by side on the side of the seat surface, and the switch a, the switch b, the linear reciprocating driving member, and the angle driving member are electrically connected to the controller respectively.

[0007] In one embodiment of the utility model, the linear reciprocating drive member includes a screw rod rotatably arranged inside the sliding slot and a drive motor arranged on the right side of the mounting plate, the output shaft of the drive motor is connected to the screw rod, a slider is arranged inside the sliding slot, and the slider is threadedly connected to the screw rod.

[0008] In one embodiment of the utility model, the leg rest includes a grille supporting plate, and a hinge support a and a hinge support b are alternately arranged on the right side of the bottom of the grille supporting plate, the hinge rod is hinged to the leg rest through the hinge support a, one end of the angle driving member is hinged to the leg rest through the hinge support b, and the other end of the angle driving member is hinged to the slider.

[0009] In an embodiment of the present invention, the angle driving member is an electric push rod.

[0010] In one embodiment of the utility model, the signal output ends of the switch a and the switch b are electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the electric push rod and the signal input end of the drive motor respectively.

[0011] In an embodiment of the present invention, the leg rest includes a supporting structure arranged on the grille supporting plate.

[0012] In an embodiment of the present invention, the supporting structure includes a breathable supporting member and a mesh surface layer wrapped around the outside of the breathable supporting member.

[0013] In an embodiment of the present invention, at least one fan is disposed inside the grille supporting plate.

[0014] In an embodiment of the utility model, a switch c electrically connected to the fan is arranged inside the breathable support, and a cross bar consistent with the width of the breathable support is arranged at the trigger end of the switch c.

[0015] In an embodiment of the present invention, the switch c is a micro switch.

[0016] The beneficial effect of the utility model is that the leg rest driving structure of the teaching chair obtained by the utility model through the above-mentioned design, through the two-level leg rest driving component composed of a mounting plate, a linear reciprocating driving component and an angle driving component, can also perform a second-level folding through the linear reciprocating driving component after the first-level folding through the angle driving component during use. Compared with the existing leg rest folding structure, the leg rest driving structure can increase the folding angle of the leg rest, avoid obstruction of students' legs during use, improve the comfort of use, and improve the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of an unfolded structure of the leg support driving structure provided in an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of another unfolded structure of the leg support driving structure provided in an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of the structure of the leg support driving structure after folding provided by the embodiment of the utility model;

[0021] Figure 4 A schematic cross-sectional view of a leg support driving structure provided in an embodiment of the utility model;

[0022] Figure 5 A communication block diagram of the leg support drive structure provided in an embodiment of the utility model.

[0023] In the figure: 1. seat surface; 2. secondary leg support drive member; 21. mounting plate; 211. sliding slot; 22. linear reciprocating drive member; 221. screw rod; 222. drive motor; 223. slider; 23. angle drive member; 231. electric push rod; 3. leg support; 31. mesh surface layer; 32. breathable support member; 33. grille support plate; 34. fan; 35. hinge support a; 36. hinge support b; 4. hinge rod; 5. switch a; 6. switch b; 7. switch c; 8. controller. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0026] Figures 1 to 3 The schematic diagram of the structure of the driving structure of the leg rest 3 in different unfolding states provided by the embodiment of the utility model is shown. The secondary leg rest driving member 2 composed of the mounting plate 21, the linear reciprocating driving member 22 and the angle driving member 23 can realize the secondary folding of the leg rest 3. The angle driving member 23 and the linear reciprocating driving member 22 can be controlled by the switch a5 and the switch b6 respectively to adjust the folding angle of the leg rest 3. Figure 3 As shown, after the secondary leg rest driving member 2 is folded for the second time, the leg rest 3 can be folded to the bottom of the seat 1, and the student's legs can be placed under the seat 1 during use. Compared with the existing leg rest 3 folding structure, the leg rest 3 driving structure can increase the folding angle of the leg rest 3, avoid obstruction of the student's legs during use, and improve the comfort and convenience of use.

[0027] like Figure 4 As shown, the linear reciprocating drive member 22 includes a screw rod 221 rotatably arranged inside the sliding slot 211 and a drive motor 222 arranged on the right side of the mounting plate 21, the output shaft of the drive motor 222 is connected to the screw rod 221, and a slider 223 is arranged inside the sliding slot 211, and the slider 223 is threadedly connected to the screw rod 221.

[0028] In the above driving process, the position of the slider 223 in the sliding slot 211 can be adjusted by controlling the forward rotation or reverse rotation of the driving motor 222 .

[0029] In a preferred embodiment, the cross-sectional shape of the sliding slot 211 and the slider 223 is T-shaped, and the outer wall of the slider 223 is gap-matched with the inner wall of the sliding slot 211. In addition to limiting the movement of the slider 223 along its length direction, the sliding slot 211 also limits the vertical downward movement of the slider 223, thereby improving the stability of the bearing structure of the leg rest 3.

[0030] In one embodiment, the drive motor 222 and the screw rod 221 may also be replaced by an electric push rod 231 structure or other telescopic structures, wherein the output shaft of the electric push rod 231 is connected to the slider 223 to enable the slider 223 to reciprocate inside the sliding slot 211 .

[0031] like Figure 4As shown, the leg support 3 includes a grille supporting plate 33, on the right side of the bottom of the grille supporting plate 33, hinge supports a35 and hinge supports b36 are alternately arranged, the hinge rod 4 is hinged to the leg support 3 through the hinge support a35, one end of the angle driving member 23 is hinged to the leg support 3 through the hinge support b36, and the other end of the angle driving member 23 is hinged to the slider 223.

[0032] The angle driving member 23 is an electric push rod 231, and can also be configured as a linear driving structure such as a cylinder or a hydraulic rod.

[0033] like Figures 1 to 5 As shown, a controller 8 is provided inside the mounting plate 21, and switches a5 and b6 are arranged side by side on the side of the seat surface 1. The signal output ends of switches a5 and b6 are electrically connected to the signal input end of the controller 8, and the signal output end of the controller 8 is electrically connected to the signal input end of the electric push rod 231 and the drive motor 222, respectively.

[0034] In the first example, the leg rest 3 is fully unfolded, and the leg rest 3 is unfolded to be flush with the seat surface 1 (such as Figure 1 The specific process is as follows: Figure 1 The position structure in is an example, the side close to the leg rest 3 is defined as the left side, and the side away from the leg rest 3 is defined as the right side. The switch a5 is turned to the left and maintained, and the controller 8 controls the drive motor 222 to drive the screw rod 221 to rotate forward for a set number of circles and then stop. During this process, the slider 223 is driven to move to the left. After controlling the drive motor 222 to stop running, the controller 8 controls the electric push rod 231 to extend and adjust the unfolding angle of the leg rest 3. During this process, the switch a5 is released, and the electric push rod 231 stops extending to fix the angle of the leg rest 3. The switch a5 is continued to be turned to the left, and the electric push rod 231 continues to extend to adjust the angle of the leg rest 3 until the electric push rod 231 is fully extended. The controller 8 controls the electric push rod 231 to stop running, and the leg rest 3 is kept flush with the seat surface 1.

[0035] In the second example, the leg rest 3 needs to be folded to form a certain angle with the seat surface 1 (such as Figure 2 The specific process is as follows: Figure 2 The position structure in is taken as an example, the side close to the leg rest 3 is defined as the left side, and the side away from the leg rest 3 is defined as the right side. The switch a5 is turned to the right and held, and the controller 8 controls the electric push rod 231 to retract to adjust the folding angle of the leg rest 3. During this process, the switch a5 is released, and the electric push rod 231 stops retracting to fix the angle of the leg rest 3. The switch is continued to be turned to the right, and the electric push rod 231 continues to retract to adjust the angle of the leg rest 3 until the electric push rod 231 is fully retracted.

[0036] In the third example, the leg rest 3 needs to be completely folded (eg Figure 3The specific process is as follows: Figure 2 The position structure in the figure is an example, the side close to the leg rest 3 is defined as the left side, and the side away from the leg rest 3 is defined as the right side. When the switch b6 is turned to the right, the controller 8 controls the electric push rod 231 to fully retract and then stop running. At this time, the first folding is performed. After the electric push rod 231 is controlled to stop running, the drive motor 222 is controlled to drive the screw rod 221 to rotate in the opposite direction for a set number of circles and then stop. In this process, the driving slider 223 moves toward the right side, driving the leg rest 3 to fold for the second time. At this time, the leg rest 3 is folded to the position as shown in FIG. Figure 3 shown.

[0037] It should be noted that the controller 8 uses the existing technology to control the forward and reverse rotation of the drive motor 222 and the extension or retraction of the electric push rod 231 according to the signals of the switch and the switch b6. Its specific working principle is clear to those skilled in the art and will not be repeated here.

[0038] On the other hand, during the use of the leg rest 3, especially during school teaching, when used in summer, there is still a problem of hot and uncomfortable legs. In order to solve this problem, the leg rest 3 is further improved in the utility model.

[0039] like Figures 1 to 4 As shown, the leg support 3 includes a supporting structure arranged on a grid supporting plate 33 .

[0040] Specifically, the supporting structure includes a breathable supporting member 32 and a mesh surface layer 31 wrapped around the outside of the breathable supporting member 32. The advantage of adopting this structure is that during the use of the leg support 3, the breathability of the legs can be maintained and the comfort can be improved.

[0041] Furthermore, at least one fan 34, preferably four, is arranged inside the grille support plate 33. At the same time, a switch c7 electrically connected to the fan 34 is arranged inside the breathable support member 32. The switch c7 is a micro switch. A cross bar consistent with the breathable support width is arranged at the trigger end of the switch c7. After the legs are placed on the leg rests 3, the legs squeeze the trigger end of the switch c7 through the cross bar. The switch c7 connects the fan 34 to the power supply. After the fan 34 is started, air can be introduced into the breathable support member 32 and blown to the legs through the mesh surface layer 31, so as to avoid heat accumulation and maintain the breathability of the legs, thereby further improving the comfort of the legs. After the legs leave the leg rests 3, the fan 34 stops running.

[0042] Specifically, the working principle of the leg rest 3 driving structure of this teaching chair is as follows: during use, after the first level folding is performed by the angle driving member 23, the second level folding can also be performed by the linear reciprocating driving member 22. Compared with the existing leg rest 3 folding structure, the leg rest 3 driving structure can increase the folding angle of the leg rest 3, avoid obstruction of the students' legs during use, improve the comfort of use, and improve the convenience of use.

[0043] It should be noted that the specific models and specifications of the controller 8, switch a5, switch b6, switch c7, drive motor 222 and electric push rod 231 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0044] The power supply and principles of the controller 8, switch a5, switch b6, switch c7, the drive motor 222 and the electric push rod 231 are clear to those skilled in the art and will not be described in detail herein.

[0045] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A leg support driving structure of a teaching chair, arranged at the bottom of a seat surface (1) of the teaching chair, characterized in that: A mounting plate (21) is provided at the bottom of the seat surface (1), the bottom of the mounting plate (21) has a sliding slot (211), a linear reciprocating drive member (22) is provided at the sliding slot (211), the left side of the bottom of the mounting plate (21) is hinged to one end of a hinged rod (4), the other end of the hinged rod (4) is hinged to the right side of the bottom of the leg rest (3), an angle drive member (23) is provided between the linear reciprocating drive member (22) and the leg rest (3), and the angle drive member (23) is provided at the bottom of the mounting plate (21). One end of the angle drive member (23) is hinged to the right side of the bottom of the leg rest (3), and the other end of the angle drive member (23) is hinged to the reciprocating moving part of the linear reciprocating drive member (22). A controller (8) is provided inside the mounting plate (21), and a switch a (5) and a switch b (6) are arranged side by side on the side of the seat surface (1). The switch a (5), the switch b (6), the linear reciprocating drive member (22), and the angle drive member (23) are electrically connected to the controller (8) respectively.

2. The leg support driving structure of a teaching chair according to claim 1, characterized in that: The linear reciprocating drive member (22) comprises a screw rod (221) rotatably arranged inside the sliding slot (211) and a drive motor (222) arranged on the right side of the mounting plate (21), the output shaft of the drive motor (222) being connected to the screw rod (221), a slider (223) being arranged inside the sliding slot (211), and the slider (223) being threadedly connected to the screw rod (221).

3. The leg support driving structure of a teaching chair according to claim 2, characterized in that: The leg support (3) comprises a grille support plate (33), and a hinge support a (35) and a hinge support b (36) are alternately arranged on the right side of the bottom of the grille support plate (33); the hinge rod (4) is hinged to the leg support (3) through the hinge support a (35); one end of the angle driving member (23) is hinged to the leg support (3) through the hinge support b (36); and the other end of the angle driving member (23) is hinged to the slider (223).

4. The leg support driving structure of a teaching chair according to claim 3, characterized in that: The angle driving member (23) is an electric push rod (231).

5. The leg support driving structure of a teaching chair according to claim 4, characterized in that: The signal output ends of the switch a (5) and the switch b (6) are electrically connected to the signal input end of the controller (8), and the signal output end of the controller (8) is electrically connected to the signal input end of the electric push rod (231) and the drive motor (222), respectively.

6. A leg support driving structure for a teaching chair according to any one of claims 3 to 5, characterized in that: The leg support (3) comprises a supporting structure arranged on the grid supporting plate (33).

7. The leg support driving structure of a teaching chair according to claim 6, characterized in that: The supporting structure comprises a breathable supporting member (32) and a mesh surface layer (31) wrapped around the outside of the breathable supporting member (32).

8. The leg support driving structure of a teaching chair according to claim 7, characterized in that: At least one fan (34) is arranged inside the grille supporting plate (33).

9. The leg support driving structure of a teaching chair according to claim 8, characterized in that: A switch c (7) electrically connected to the fan (34) is arranged inside the breathable support member (32), and a crossbar having the same width as the breathable support is arranged at the trigger end of the switch c (7).

10. The leg support driving structure of a teaching chair according to claim 9, characterized in that: The switch c (7) is a micro switch.

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