A key control device

Abstract

The present invention discloses a key control device, and relates to the field of key control technology. The spring bracket in the key control device includes a first frame and a second frame. The first frame and the second frame together form a limiting cavity, and the limiting cavity is used for a spring to pass through and to limit the spring. Compared with the prior art, the spring bracket provided by the present invention uses the first frame and the second frame that together form the limiting cavity, so that the production efficiency can be improved while ensuring the limiting effect, and the installation is convenient, and the displacement range of the spring can be reduced to avoid the lateral displacement of the spring, so as to make the control sensitivity high.

Description

Technical Field

[0001] The present invention relates to the technical field of key control, and in particular to a key control device. Background Art

[0002] At present, the buttons used on electrical appliances are usually controlled by pressing a spring with a pressing piece, and the spring is set in a limiting hole of a spring bracket, and the spring bracket can limit and guide the spring. However, in order to improve production efficiency, the spring is first welded between the substrate and the pressing piece, and then the spring bracket is fixed on the substrate through the pressing piece. However, in this way, the area of ​​the limiting hole is larger than the area of ​​the pressing piece, and the area of ​​the pressing piece is larger than the area of ​​the spring, resulting in poor limiting effect of the limiting hole on the spring, a large spring offset range, and lateral offset when the spring is pressed, which affects the control function and has low sensitivity. Summary of the invention

[0003] The problem solved by the present invention is how to improve production efficiency while ensuring the limiting effect, facilitate installation, reduce the offset range of the spring, avoid lateral offset of the spring, and increase control sensitivity.

[0004] To solve the above problems, the technical solution of the present invention is achieved as follows:

[0005] In a first aspect, the present invention provides a spring bracket, comprising a first frame and a second frame, the first frame and the second frame together enclosing a limiting cavity, the limiting cavity being used for a spring to pass through and to limit the spring. Compared with the prior art, the spring bracket provided by the present invention can improve production efficiency while ensuring the limiting effect, is easy to install, can reduce the displacement range of the spring, and avoid lateral displacement of the spring, so as to have high control sensitivity.

[0006] Furthermore, the first frame includes a first connecting portion, a second connecting portion and a first mounting portion, the first connecting portion is fixedly connected to the second connecting portion through the first mounting portion, and the first mounting portion and the second frame together form a limiting cavity, so as to facilitate installation and limit and guide the spring.

[0007] Furthermore, the second frame includes a third connection part, a fourth connection part and a second mounting part, the third connection part is fixedly connected to the fourth connection part through the second mounting part, the fourth connection part is detachably connected to the second connection part, and the second mounting part and the first mounting part jointly form a limiting cavity, so as to facilitate installation and limit and guide the spring.

[0008] Furthermore, the third connection part is detachably connected to the first connection part to facilitate installation and disassembly.

[0009] Furthermore, the first connecting part is a pin, and the third connecting part is provided with a first axial hole, and the first connecting part can extend into the first axial hole and cooperate with the first axial hole. The first axial hole can limit the first connecting part along its radial direction, so that the first connecting part can rotate relative to the first axial hole.

[0010] Furthermore, the second connecting part is a pin, the fourth connecting part is provided with a second axial hole, the second connecting part can extend into the second axial hole and cooperate with the second axial hole. The second axial hole can limit the second connecting part along its radial direction, so that the second connecting part can rotate relative to the second axial hole.

[0011] Furthermore, the spring bracket further comprises an elastic sheet, the third connecting part is integrally formed with the first connecting part via the elastic sheet, and the third connecting part can rotate relative to the first connecting part, so as to facilitate installation.

[0012] Further, the second connection part is a buckle, the fourth connection part is a hook, and the second connection part is engaged with the fourth connection part. The second connection part and the fourth connection part can limit each other to fix the relative position of the second connection part and the fourth connection part.

[0013] Furthermore, the cross-section of the first mounting portion and the cross-section of the second mounting portion are both semicircular. The first mounting portion and the second mounting portion are combined to form a cylindrical shape, and the enclosed limiting cavity is circular, so that the first mounting portion and the second mounting portion can be spliced ​​together along the radial direction of the spring to prevent the first mounting portion or the second mounting portion from being stuck by the spring.

[0014] Furthermore, the first frame body further includes a plurality of first extension portions, the number of the first mounting portions is multiple, and each first extension portion is fixedly connected between two adjacent first mounting portions to fix the relative positions of the multiple first mounting portions.

[0015] In a second aspect, the present invention provides a key control device, including a spring, a pressing plate, a substrate, and the above-mentioned spring bracket, the spring bracket including a first frame and a second frame, the first frame and the second frame together enclose a limiting cavity, one end of the spring is fixedly connected to the substrate, and the other end is fixedly connected to the pressing plate, the spring bracket is arranged between the pressing plate and the substrate, and is detachably connected to the substrate, the spring is arranged in the limiting cavity, the limiting cavity is used for the spring to pass through, and the spring is limited. The key control device can improve production efficiency while ensuring the limiting effect, is easy to install, can reduce the offset range of the spring, and avoid lateral offset of the spring, so as to make the control sensitivity high.

[0016] Furthermore, the spring bracket is provided with a positioning column, and the base plate is provided with a positioning hole, the positioning column can extend into the positioning hole and cooperate with the positioning hole. The positioning hole can limit the positioning column to define the relative position of the spring bracket and the base plate.

[0017] Furthermore, the spring bracket is provided with a clamping arm, and the base plate is provided with a clamping hole, and the clamping arm can extend into the clamping hole and be clamped with the clamping hole. The clamping hole can limit the clamping arm to fix the relative position of the spring bracket and the base plate.

[0018] Furthermore, the spring bracket is provided with a through hole, and the base plate is provided with a threaded hole, the through hole is used for screws to pass through, and the screws can cooperate with the threaded holes to further fix the relative positions of the spring bracket and the base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the spring support limiting the spring according to the first embodiment of the present invention;

[0020] Figure 2 is a structural schematic diagram of a spring bracket according to a first embodiment of the present invention from one viewing angle;

[0021] Figure 3 is a schematic structural diagram of the spring bracket according to the first embodiment of the present invention from another perspective;

[0022] Figure 4 yes Figure 3 An exploded view showing the connection between the first connecting part and the third connecting part;

[0023] Figure 5 is an exploded view of the connection between the first frame body and the second frame body in the spring bracket according to the second embodiment of the present invention;

[0024] Figure 6 is a schematic structural diagram of a spring bracket according to a third embodiment of the present invention;

[0025] Figure 7 is a schematic structural diagram of a key control device according to a fourth embodiment of the present invention;

[0026] Figure 8 4 is a schematic structural diagram of a spring bracket according to a fourth embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 10-button control device; 100-spring bracket; 110-first frame; 111-first connecting part; 112-second connecting part; 113-first mounting part; 114-first extension part; 120-second frame; 121-third connecting part; 122-fourth connecting part; 123-second mounting part; 124-second extension part; 125-first axial hole; 126-second axial hole; 130-limiting cavity; 140-positioning column; 141-first half body; 142-second half body; 150-clamping arm; 160-through hole; 161-first semicircular hole; 162-second semicircular hole; 170-elastic sheet; 171-first elastic arm; 172-second elastic arm; 200-spring; 300-pressing sheet; 400-substrate; 410-positioning hole; 420-clamping hole; 430-threaded hole. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] First embodiment

[0031] Please refer to Figure 1 The embodiment of the present invention provides a spring bracket 100 for limiting and guiding a spring 200. It can improve production efficiency while ensuring the limiting effect, facilitate installation, reduce the deflection range of the spring 200, and avoid lateral deflection of the spring 200, so as to increase the control sensitivity.

[0032] It should be noted that the spring bracket 100 is applied to an electrical appliance, and the electrical appliance is provided with a substrate 400 for realizing a control function. The substrate 400 is connected to the pressing sheet 300 through the spring 200. The user can push the spring 200 to apply force to the substrate 400 by pressing the pressing sheet 300 to realize the control function. Specifically, the area of ​​the pressing sheet 300 is larger than the area of ​​the spring 200, so that the user can press it and it has a high aesthetics. The spring bracket 100 is arranged between the pressing sheet 300 and the substrate 400. The spring bracket 100 is used to limit and guide the spring 200 to prevent the spring 200 from lateral displacement during the pressure process, so as to improve the sensitivity of the press control.

[0033] Please refer to Figure 2The spring bracket 100 includes a first frame 110 and a second frame 120. The first frame 110 and the second frame 120 are detachably connected to facilitate installation and removal. The first frame 110 and the second frame 120 together enclose a limiting cavity 130, and the limiting cavity 130 is used for the spring 200 to pass through and limit the spring 200. Specifically, the cross-sectional area of ​​the limiting cavity 130 is larger than the area of ​​the spring 200 and smaller than the area of ​​the pressing sheet 300. The spring bracket 100 cannot directly pass through the pressing sheet 300 to be sleeved outside the spring 200, and the spring bracket 100 cannot pass through the pressing sheet 300 to detach from the spring 200.

[0034] During the installation process of the spring bracket 100, the first frame 110 and the second frame 120 are first disassembled, and then the first frame 110 is extended between the pressing piece 300 and the base plate 400, and then the second frame 120 is extended between the pressing piece 300 and the base plate 400 and connected to the first frame 110. At this time, the first frame 110 and the second frame 120 jointly form a limiting cavity 130, the spring 200 is arranged in the limiting cavity 130, and the entire spring bracket 100 is arranged between the pressing piece 300 and the base plate 400, and the installation is completed.

[0035] It is worth noting that one end of the first frame 110 is detachably connected to one end of the second frame 120, and the other end of the first frame 110 is detachably connected to the other end of the second frame 120, so that the first frame 110 and the second frame 120 can be detachably installed between the pressing piece 300 and the substrate 400.

[0036] Please refer to Figure 3 and Figure 4 The first frame 110 includes a first connection portion 111, a second connection portion 112 and a first mounting portion 113. The first connection portion 111 is fixedly connected to the second connection portion 112 through the first mounting portion 113. In this embodiment, the first connection portion 111 is arranged at one end of the first mounting portion 113, and the second connection portion 112 is arranged at the other end of the first mounting portion 113. The first connection portion 111, the first mounting portion 113 and the second connection portion 112 are integrally formed to improve the connection strength. The first connection portion 111 and the second connection portion 112 are both detachably connected to the second frame 120. The first mounting portion 113 and the second frame 120 together enclose a limiting cavity 130 for easy installation, and can limit and guide the spring 200.

[0037] It is worth noting that the first frame 110 further includes a plurality of first extensions 114, and the number of the first mounting portions 113 is multiple, and each first extension 114 is fixedly connected between two adjacent first mounting portions 113 to fix the relative positions of the multiple first mounting portions 113. The multiple first mounting portions 113 and the second frame 120 together enclose a plurality of limiting cavities 130 to simultaneously limit the multiple springs 200. In this embodiment, the number of the first extensions 114 is three, the number of the first mounting portions 113 is four, and the four first mounting portions 113 and the second frame 120 together enclose four limiting cavities 130. However, it is not limited to this. In other embodiments, the number of the first extensions 114 can be one, and the number of the first mounting portions 113 is two, and the first extension 114 is fixedly connected between the two first mounting portions 113, and the number of the first extensions 114 and the first mounting portions 113 is not specifically limited.

[0038] The second frame 120 includes a third connection portion 121, a fourth connection portion 122, and a second mounting portion 123. The third connection portion 121 is fixedly connected to the fourth connection portion 122 through the second mounting portion 123. In this embodiment, the third connection portion 121 is arranged at one end of the second mounting portion 123, and the fourth connection portion 122 is arranged at the other end of the second mounting portion 123. The third connection portion 121, the second mounting portion 123, and the fourth connection portion 122 are integrally formed to improve the connection strength. The third connection portion 121 is detachably connected to the first connection portion 111, and the fourth connection portion 122 is detachably connected to the second connection portion 112. The second mounting portion 123 and the first mounting portion 113 jointly enclose a limiting cavity 130 for easy installation, and can limit and guide the spring 200.

[0039] It is worth noting that the second frame 120 also includes a plurality of second extensions 124, the number of the second mounting portions 123 is multiple, each second extension 124 is fixedly connected between two adjacent second mounting portions 123 to fix the relative positions of the multiple second mounting portions 123, and each second extension 124 is arranged in close contact with a first extension 114. The multiple second mounting portions 123 correspond to the multiple first mounting portions 113 one by one, and together form a plurality of limiting cavities 130 to simultaneously limit the multiple springs 200. In this embodiment, the number of the second extensions 124 is three, the number of the second mounting portions 123 is four, and the four second mounting portions 123 and the four first mounting portions 113 together form four limiting cavities 130. However, it is not limited to this. In other embodiments, the number of the second extension 124 can be one, and the number of the second mounting portions 123 is two, and the second extension 124 is fixedly connected between the two second mounting portions 123, and the number of the second extension 124 and the second mounting portion 123 is not specifically limited.

[0040] In this embodiment, the cross-sections of the first mounting portion 113 and the second mounting portion 123 are both semicircular, the first mounting portion 113 and the second mounting portion 123 are combined to form a cylindrical shape, and the enclosed limiting cavity 130 is circular, so that the first mounting portion 113 and the second mounting portion 123 can be spliced ​​together along the radial direction of the spring 200 to prevent the first mounting portion 113 or the second mounting portion 123 from being stuck by the spring 200. Specifically, the spring 200 and the pressing piece 300 are both circular, the diameter of the pressing piece 300 is larger than the diameter of the limiting cavity 130, and the diameter of the limiting cavity 130 is larger than the diameter of the spring 200.

[0041] In this embodiment, the first connection portion 111 is a pin, and the third connection portion 121 is provided with a first shaft hole 125. The first connection portion 111 can extend into the first shaft hole 125 and cooperate with the first shaft hole 125. The first shaft hole 125 can limit the first connection portion 111 along its radial direction, so that the first connection portion 111 can rotate relative to the first shaft hole 125. Specifically, the axial directions of the first connection portion 111 and the first shaft hole 125 are the same as the axial direction of the spring 200, so as to facilitate the installation of the spring bracket 100 between the pressing sheet 300 and the base plate 400.

[0042] In this embodiment, the second connection part 112 is a buckle, and the fourth connection part 122 is a hook. The second connection part 112 is snap-connected with the fourth connection part 122. The second connection part 112 and the fourth connection part 122 can limit each other to fix the relative position of the second connection part 112 and the fourth connection part 122.

[0043] It should be noted that one end of the first frame 110 is detachably connected to the second frame 120 by a hinge, and the other end of the first frame 110 is detachably connected to the other end of the second frame 120 by a snap-on connection to fix the relative positions of the first frame 110 and the second frame 120.

[0044] In the spring bracket 100 described in the embodiment of the present invention, the first frame body 110 and the second frame body 120 jointly enclose a limiting cavity 130, and the limiting cavity 130 is used for the spring 200 to pass through and to limit the spring 200. Compared with the prior art, the spring bracket 100 provided by the present invention uses the first frame body 110 and the second frame body 120 that jointly enclose the limiting cavity 130, so that the production efficiency can be improved while ensuring the limiting effect, the installation is convenient, the displacement range of the spring 200 can be reduced, and the lateral displacement phenomenon of the spring 200 can be avoided, so that the control sensitivity is high.

[0045] Second embodiment

[0046] Please refer to Figure 5The present invention provides a spring bracket 100. Compared with the first embodiment, the difference of this embodiment is that the structures of the second connecting portion 112 and the fourth connecting portion 122 are different.

[0047] In this embodiment, the second connection portion 112 is a pin, and the fourth connection portion 122 is provided with a second shaft hole 126. The second connection portion 112 can extend into the second shaft hole 126 and cooperate with the second shaft hole 126. The second shaft hole 126 can limit the second connection portion 112 along its radial direction, so that the second connection portion 112 can rotate relative to the second shaft hole 126. Specifically, the axial directions of the second connection portion 112 and the second shaft hole 126 are the same as the axial direction of the spring 200, so as to facilitate the installation of the spring bracket 100 between the pressing sheet 300 and the base plate 400.

[0048] It should be noted that one end of the first frame 110 is detachably connected to the second frame 120 by a hinge, and the other end of the first frame 110 is detachably connected to the other end of the second frame 120 by a hinge. The second connecting portion 112 can extend into the second axial hole 126 while the first connecting portion 111 extends into the first axial hole 125, so as to fix the relative positions of the first frame 110 and the second frame 120.

[0049] The beneficial effects of the spring bracket 100 described in the embodiment of the present invention are the same as those of the first embodiment, and will not be described in detail herein.

[0050] Third embodiment

[0051] Please refer to Figure 6 The present invention provides a spring bracket 100. Compared with the first embodiment, the difference of this embodiment is that the connection method of the first frame 110 and the second frame 120 is different.

[0052] In this embodiment, the spring bracket 100 also includes an elastic sheet 170, and the third connection portion 121 is no longer detachably connected to the first connection portion 111. Instead, the third connection portion 121 is integrally formed with the first connection portion 111 through the elastic sheet 170, and the third connection portion 121 can rotate relative to the first connection portion 111 to facilitate installation.

[0053] It should be noted that the elastic sheet 170 is elastic. The elastic sheet 170 includes a first elastic arm 171 and a second elastic arm 172. The first elastic arm 171 and the second elastic arm 172 are integrally formed and arranged at an angle. The first elastic arm 171 is fixedly connected to the first connecting portion 111, and the second elastic arm 172 is fixedly connected to the third connecting portion 121. The first elastic arm 171 can rotate relative to the second elastic arm 172 to increase or decrease the angle between the first elastic arm 171 and the second elastic arm 172, thereby causing the first connecting portion 111 and the third connecting portion 121 to rotate relative to each other.

[0054] Specifically, one end of the first frame 110 is integrally formed with the second frame 120 by a hinge, and the other end of the first frame 110 is detachably connected to the other end of the second frame 120 by a snap connection to fix the relative positions of the first frame 110 and the second frame 120.

[0055] The beneficial effects of the spring bracket 100 described in the embodiment of the present invention are the same as those of the first embodiment, and will not be described in detail herein.

[0056] Fourth embodiment

[0057] Please refer to Figure 7 and Figure 8 The present invention provides a key control device 10 for realizing a control function. The key control device 10 includes a spring 200, a pressing sheet 300, a substrate 400 and a spring bracket 100. The basic structure and principle of the spring bracket 100 and the technical effect produced are the same as those of the first embodiment. For the sake of brief description, for the parts not mentioned in this embodiment, reference may be made to the corresponding contents in the first embodiment.

[0058] It should be noted that the key control device 10 is applied to electrical appliances, such as air conditioners, and the air conditioners can control their various functions through the key control device 10 to achieve the switching of cooling and heating modes and the control of functions such as wind speed.

[0059] It is worth noting that one end of the spring 200 is fixedly connected to the base plate 400, and the other end is fixedly connected to the pressing sheet 300. In this embodiment, the spring 200 is connected between the base plate 400 and the pressing sheet 300 by spot welding to improve the connection strength. The spring bracket 100 is arranged between the pressing sheet 300 and the base plate 400, and is detachably connected to the base plate 400, so that the spring bracket 100 can be installed on the base plate 400, and the spring 200 is arranged in the limiting cavity 130.

[0060] It should be noted that there are multiple springs 200, and multiple springs 200 are arranged side by side on the substrate 400. There are also multiple limiting cavities 130 in the spring bracket 100, and each spring 200 is arranged in a limiting cavity 130. The spring bracket 100 can limit and guide multiple springs 200 at the same time to improve installation efficiency. In this embodiment, the number of springs 200 and limiting cavities 130 is four, but it is not limited to this. In other embodiments, the number of springs 200 and limiting cavities 130 can be one or two, and the number of springs 200 and limiting cavities 130 is not specifically limited.

[0061] In this embodiment, the spring support 100 is provided with a positioning column 140, and the base plate 400 is provided with a positioning hole 410. The positioning column 140 can extend into the positioning hole 410 and cooperate with the positioning hole 410. The positioning hole 410 can limit the positioning column 140 to define the relative position of the spring support 100 and the base plate 400. Specifically, the positioning column 140 is provided in the middle of the bottom surface of the spring support 100, and the positioning column 140 includes a first half body 141 and a second half body 142. The first half body 141 is fixedly connected to the first extension portion 114, and the second half body 142 is fixedly connected to the second extension portion 124. The first half body 141 and the second half body 142 are combined to form a complete positioning column 140, and cooperate with the positioning hole 410.

[0062] In this embodiment, the spring bracket 100 is provided with a clamping arm 150, and the base plate 400 is provided with a clamping hole 420. The clamping arm 150 can extend into the clamping hole 420 and be clamped with the clamping hole 420. The clamping hole 420 can limit the clamping arm 150 to fix the relative position of the spring bracket 100 and the base plate 400. Specifically, there are two clamping arms 150 and two clamping holes 420, each clamping arm 150 is clamped with one clamping hole 420, one clamping arm 150 is provided on the first mounting portion 113, and the other clamping arm 150 is provided on the second mounting portion 123. The two clamping arms 150 are arranged opposite to each other to improve the positioning effect.

[0063] In this embodiment, the spring support 100 is provided with a through hole 160, and the base plate 400 is provided with a threaded hole 430. The position of the through hole 160 corresponds to the position of the threaded hole 430. The through hole 160 is used for a screw to pass through. The screw can cooperate with the threaded hole 430 to further fix the relative position of the spring support 100 and the base plate 400. Specifically, the through hole 160 is provided in the middle of the spring support 100, the first extension portion 114 is provided with a first semicircular hole 161, and the second extension portion 124 is provided with a second semicircular hole 162. The first semicircular hole 161 and the second semicircular hole 162 are combined to form a complete through hole 160 for the screw to pass through.

[0064] It should be noted that, during the installation process of the spring bracket 100, the first connecting portion 111 is first inserted into the first axial hole 125 of the third connecting portion 121, so that the first frame 110 and the second frame 120 are hinged, and then the first frame 110 and the second frame 120 are moved between the pressing piece 300 and the base plate 400, so that the spring 200 is arranged between the first mounting portion 113 and the second mounting portion 123, and then the first frame 110 and the second frame 120 are closed, so that the second connecting portion 112 is engaged with the fourth connecting portion 122, and at this time, the first frame 110 and the second frame are hinged. 120 together enclose a limiting cavity 130, and the spring 200 is located in the limiting cavity 130, and then the entire spring bracket 100 is pressed in the direction close to the substrate 400, so that the positioning column 140 extends into the positioning hole 410 and cooperates with the positioning hole 410, and the clamping arm 150 extends into the clamping hole 420 and clamps with the clamping hole 420 to preliminarily fix the relative position of the spring bracket 100 and the substrate 400, finally, the screw is passed through the through hole 160 and tightened relative to the threaded hole 430 to further fix the relative position of the spring bracket 100 and the substrate 400 to complete the installation.

[0065] The beneficial effects of the key control device 10 described in the embodiment of the present invention are the same as those of the first embodiment, and will not be described in detail herein.

[0066] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A key control device, characterized in that: The invention comprises a spring (200), a pressing sheet (300), a base plate (400) and a spring bracket (100), wherein the spring bracket (100) comprises a first frame body (110) and a second frame body (120), wherein the first frame body (110) and the second frame body (120) together form a limiting cavity, wherein the limiting cavity is used for allowing the spring (200) to pass through and for limiting the spring (200); One end of the spring (200) is fixedly connected to the base plate (400), and the other end is fixedly connected to the pressing plate (300); the spring bracket (100) is arranged between the pressing plate (300) and the base plate (400), and is detachably connected to the base plate (400); and the spring (200) is arranged in the limiting cavity; The first frame (110) comprises a first connecting portion (111), a second connecting portion (112) and a first mounting portion (113); the first connecting portion (111) is fixedly connected to the second connecting portion (112) via the first mounting portion (113); the first mounting portion (113) and the second frame (120) together enclose the limiting cavity; The second frame (120) comprises a third connecting portion (121), a fourth connecting portion (122) and a second mounting portion (123); the third connecting portion (121) is fixedly connected to the fourth connecting portion (122) via the second mounting portion (123); the fourth connecting portion (122) is detachably connected to the second connecting portion (112); and the second mounting portion (123) and the first mounting portion (113) together enclose the limiting cavity; The third connection portion (121) is detachably connected to the first connection portion (111); The spring bracket (100) further comprises an elastic sheet (170), the third connecting portion (121) is integrally formed with the first connecting portion (111) via the elastic sheet (170), and the third connecting portion (121) is capable of rotating relative to the first connecting portion (111).

2. The key control device according to claim 1, characterized in that: The first connecting portion (111) is a pin shaft, the third connecting portion (121) is provided with a first axial hole (125), and the first connecting portion (111) can extend into the first axial hole (125) and cooperate with the first axial hole (125).

3. The key control device according to claim 2, characterized in that: The second connecting portion (112) is a pin shaft, the fourth connecting portion (122) is provided with a second axial hole (126), and the second connecting portion (112) can extend into the second axial hole (126) and cooperate with the second axial hole (126).

4. The key control device according to claim 1, characterized in that: The second connecting portion (112) is a buckle, the fourth connecting portion (122) is a hook, and the second connecting portion (112) is snap-connected with the fourth connecting portion (122).

5. The key control device according to claim 1, characterized in that: The cross-section of the first mounting portion (113) and the cross-section of the second mounting portion (123) are both semicircular.

6. The key control device according to claim 1, characterized in that: The first frame (110) further comprises a plurality of first extension portions (114), the number of the first mounting portions (113) is multiple, and each first extension portion (114) is fixedly connected between two adjacent first mounting portions (113).

7. The key control device according to claim 1, characterized in that: The spring bracket (100) is provided with a positioning column (140), the base plate (400) is provided with a positioning hole (410), and the positioning column (140) can extend into the positioning hole (410) and cooperate with the positioning hole (410).

8. The key control device according to claim 1, characterized in that: The spring bracket (100) is provided with a clamping arm (150), the base plate (400) is provided with a clamping hole (420), and the clamping arm (150) can extend into the clamping hole (420) and be clamped with the clamping hole (420).

9. The key control device according to claim 1, characterized in that: The spring bracket (100) is provided with a through hole (160), and the base plate (400) is provided with a threaded hole (430); the through hole (160) is used for a screw to pass through, and the screw can cooperate with the threaded hole (430).

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