CN112053874A - A key structure and a thermostat using the key structure - Google Patents

Abstract

The invention relates to a key structure and a temperature controller using the key structure. The key structure includes: an operation panel, the operation panel has a front side and a rear side, the front side of the operation panel faces the operator when in use, and the rear side of the operation panel faces away from the operator when in use; a circuit board, arranged on the operation panel The rear side is provided with a switch circuit; the key board is arranged on the front side of the operation panel for triggering the switch circuit when pressed; it also includes: an elastic member arranged at the rear side of the operation panel for The key board exerts a forward elastic force, the elastic piece includes a base body and a pushing protrusion, the rear side of the base body is supported on the circuit board, and the pushing protrusion is forwardly disposed on the base body; the operation panel A through hole is provided on the upper surface, the through hole penetrates the operation panel in the front-rear direction, and the pushing protrusion is inserted into the through hole to allow the elastic member to bear the pressing of the key board when the key board is pressed down.

Description

A key structure and a thermostat using the key structure

technical field

The invention relates to a key structure and a temperature controller using the key structure.

Background technique

The touch button is an electronic switch component, which cannot produce functions independently, and must be used in conjunction with the PCB board to form a complete switch control system. The light touch button is generally installed on the circuit board. As long as the light touch button is lightly pressed, the circuit can be turned on. When the light touch button is released, it can be automatically reset. move to achieve electrical signal transmission. The tact button has the advantages of small contact resistance load, precise operating force error, and diversified specifications, and is widely used in electronic equipment such as tact switches.

The Chinese patent with the authorization announcement number CN206774426U discloses a key structure, including a key cap and a body panel, the key cap is clamped on the body panel, and a reset elastic member is arranged between the key cap and the body panel. During the pressing process, the button cap is reset; the pressing cap is in contact with the trigger button on the circuit board, and when the pressing cap is pressed, the trigger button is triggered to realize circuit conduction.

Since the above-mentioned reset elastic member is arranged between the key cap and the body panel, it occupies a lot of front space of the body panel, resulting in a larger thickness of the key cap, which in turn results in a larger overall thickness of the body panel, which is not conducive to lightweight design.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a key structure, so as to solve the technical problem that the reset elastic member is arranged between the key cap and the main body panel in the prior art, which occupies a lot of front space of the main body panel, resulting in a large thickness of the key cap. The purpose of the present invention is also to provide a kind of temperature controller, in order to solve the problem that the reset elastic member is arranged between the key cap and the body panel in the prior art, which occupies more frontal space of the body panel and causes the thickness of the key cap to be larger. , which further leads to a technical problem that the overall thickness of the body panel is relatively large.

To achieve the above object, the technical scheme of the key structure of the present invention is:

Key structure, including:

Operation panel, the operation panel has a front side and a rear side, the front side of the operation panel faces the operator when in use, and the rear side of the operation panel faces away from the operator when in use;

The circuit board is arranged on the rear side of the operation panel, and a switch circuit is arranged on it;

a key board, arranged on the front side of the operation panel, for triggering the switch circuit when pressed;

Also includes:

The elastic piece is arranged on the rear side of the operation panel and is used to exert a forward elastic force on the key board. The elastic piece includes a base body and a pushing protrusion. The rear side of the base body is supported on the circuit board, and the pushing protrusion protruding forward on the base body;

The operation panel is provided with a through hole, the through hole penetrates the operation panel in the front-rear direction, and the push protrusion is inserted into the through hole to allow the elastic member to bear the pressing of the key plate when the key plate is pressed down.

The beneficial effects are: by arranging the elastic piece on the rear side of the operation panel, after the key board and the elastic piece are assembled on the operation panel, not only the touch feeling of the key operation can be improved, but also the elastic piece does not occupy the space on the front side of the operation panel, The overall thickness of the key board is small, which is favorable for lightening and thinning. In addition, the elastic piece is inserted into the through hole of the operation panel through the push projection, so that the installation of the elastic piece is relatively simple and convenient, and the processing requirements of the operation panel are also lower.

Further, the base body has a groove with its opening facing backward, so that the base body has a leather bowl structure.

The beneficial effect is that the design ensures that the elastic piece has a good deformation amount when it is pressed by the key board.

Further, a positioning structure is provided between the elastic member and the operation panel, and the positioning structure is used for positioning the elastic member in a plane perpendicular to the front-rear direction.

The beneficial effects are: the elastic member is prevented from moving in a plane perpendicular to the front-rear direction, and the stability of the elastic member is ensured.

Further, the positioning structure includes a positioning column and a positioning hole, the positioning column and the positioning hole are positioned and matched, the positioning column is arranged on one of the elastic member and the operation panel, and the positioning hole is arranged on the elastic member and the operation panel. on the other one.

The beneficial effects are: through the positioning and cooperation of the positioning column and the positioning hole, it is ensured that the elastic piece will not move in a plane perpendicular to the front-rear direction.

Further, the outer peripheral surface of the pushing protrusion is a smooth surface.

The beneficial effects are: it is convenient for the pushing protrusion to move in the through hole.

Further, a light touch button is provided on the circuit board, and the light touch button is used to trigger the switch circuit;

The rear side of the base body is provided with a key escape groove, and the key escape groove corresponds to the light touch key on the circuit board to accommodate at least a part of the thickness of the light touch key.

The beneficial effect is that the key structure is suitable for light touch keys.

Further, the bottom of the key avoidance slot is provided with an avoidance hole, the avoidance hole exposes the movable pressing part of the light touch key, and the bottom of the key avoidance slot covers a part of the light touch key.

The beneficial effects are as follows: in this way, the light touch keys are exposed, and the base body has a certain strength at the same time.

Further, the switch circuit is a copper foil loop arranged on the circuit board;

A conductive layer is provided on the groove wall of the groove, or an independent silica gel key is provided in front of the base and the circuit board, and a conductive layer is provided on the rear side of the silica gel key, and the conductive layer is used to trigger the copper foil circuit.

The beneficial effects are as follows: the copper foil circuit on the circuit board is triggered by the conductive layer on the base body or the silica gel key, so that the key board is silent when pressed, and the user experience is improved.

Further, the elastic member is made of silica gel.

The beneficial effects are as follows: the deformation of the silicone material is large, so that the user has a better tactile feeling, and at the same time, it has a noise reduction effect, which can reduce the feedback sound when the light touch button is pressed.

To achieve the above purpose, the technical scheme of the thermostat of the present invention is:

The thermostat includes a panel part and a bottom case part, the panel part has a key structure;

The key structure includes:

Operation panel, the operation panel has a front side and a rear side, the front side of the operation panel faces the operator when in use, and the rear side of the operation panel faces away from the operator when in use;

The circuit board is arranged on the rear side of the operation panel, and a switch circuit is arranged on it;

a key board, arranged on the front side of the operation panel, for triggering the switch circuit when pressed;

Also includes:

The elastic piece is arranged on the rear side of the operation panel and is used to exert a forward elastic force on the key board. The elastic piece includes a base body and a pushing protrusion. The rear side of the base body is supported on the circuit board, and the pushing protrusion protruding forward on the base body;

The operation panel is provided with a through hole, the through hole penetrates the operation panel in the front-rear direction, and the push protrusion is inserted into the through hole to allow the elastic member to bear the pressing of the key plate when the key plate is pressed down.

The beneficial effects are: by arranging the elastic piece on the rear side of the operation panel, after the key board and the elastic piece are assembled on the operation panel, not only the touch feeling of the key operation can be improved, but also the elastic piece does not occupy the space on the front side of the operation panel, The overall thickness of the key board is small, which is favorable for lightening and thinning. In addition, the elastic piece is inserted into the through hole of the operation panel through the push projection, so that the installation of the elastic piece is relatively simple and convenient, and the processing requirements of the operation panel are also lower.

Further, the base body has a groove with its opening facing backward, so that the base body has a leather bowl structure.

The beneficial effect is that the design ensures that the elastic piece has a good deformation amount when it is pressed by the key board.

Further, a positioning structure is provided between the elastic member and the operation panel, and the positioning structure is used for positioning the elastic member in a plane perpendicular to the front-rear direction.

The beneficial effects are: the elastic member is prevented from moving in a plane perpendicular to the front-rear direction, and the stability of the elastic member is ensured.

Further, the positioning structure includes a positioning column and a positioning hole, the positioning column and the positioning hole are positioned and matched, the positioning column is arranged on one of the elastic member and the operation panel, and the positioning hole is arranged on the elastic member and the operation panel. on the other one.

The beneficial effects are: through the positioning and cooperation of the positioning column and the positioning hole, it is ensured that the elastic piece will not move in a plane perpendicular to the front-rear direction.

Further, the outer peripheral surface of the pushing protrusion is a smooth surface.

The beneficial effects are: it is convenient for the pushing protrusion to move in the through hole.

Further, a light touch button is provided on the circuit board, and the light touch button is used to trigger the switch circuit;

The rear side of the base body is provided with a key escape groove, and the key escape groove corresponds to the light touch key on the circuit board to accommodate at least a part of the thickness of the light touch key.

The beneficial effect is that the key structure is suitable for light touch keys.

Further, the bottom of the key avoidance slot is provided with an avoidance hole, the avoidance hole exposes the movable pressing part of the light touch key, and the bottom of the key avoidance slot covers a part of the light touch key.

The beneficial effects are as follows: in this way, the light touch keys are exposed, and the base body has a certain strength at the same time.

Further, the switch circuit is a copper foil loop arranged on the circuit board;

A conductive layer is provided on the groove wall of the groove, or an independent silica gel key is provided in front of the base and the circuit board, and a conductive layer is provided on the rear side of the silica gel key, and the conductive layer is used to trigger the copper foil circuit.

The beneficial effects are as follows: the copper foil circuit on the circuit board is triggered by the conductive layer on the base body or the silica gel key, so that the key board is silent when pressed, and the user experience is improved.

Further, the elastic member is made of silica gel.

The beneficial effects are as follows: the deformation of the silicone material is large, so that the user has a better tactile feeling, and at the same time, it has a noise reduction effect, which can reduce the feedback sound when the light touch button is pressed.

Description of drawings

1 is a schematic structural diagram of a specific embodiment 1 of a thermostat of the present invention;

Fig. 2 is a partial exploded view of the thermostat in Fig. 1;

Fig. 3 is the structural representation of the operation panel in Fig. 2;

FIG. 4 is a schematic structural diagram of the operation panel from another perspective in FIG. 3;

FIG. 5 is a schematic structural diagram of the first elastic member in FIG. 2;

FIG. 6 is a schematic structural diagram of the first elastic member in FIG. 5 from another perspective;

FIG. 7 is a schematic structural diagram of the second elastic member in FIG. 2;

FIG. 8 is a schematic structural diagram of the second elastic member in FIG. 7 from another perspective;

Fig. 9 is the structural representation of small button in Fig. 1;

FIG. 10 is a schematic structural diagram of a large button in FIG. 1;

Figure 11 is a partial cross-sectional view of the thermostat in Figure 1;

In the figure: 101-panel part; 102-bottom shell part; 1-small key board; 11-first pressing protrusion; 12-first buckle; 2-large key board; 21-second pressing protrusion; 22 -Second snap; 23-Reinforcing rib; 3-Light touch button; 31-Solder foot; 32-Active pressing part; 4-Operation panel; 41-First snap hole; 42-First button hole; 43- 44-first through hole; 45-second clamping hole; 46-second button hole; 47-second positioning hole; 48-second through hole; 49-positioning protrusion; 5-th an elastic member; 51- the first push protrusion; 52- the first base body; 53- the first positioning post; 54- the first escape hole; 55- the first key escape groove; 56- the first step structure; 57- 6- The second elastic member; 61- The second pushing protrusion; 62- The second base body; 63- The second positioning post; 64- The second escape hole; 65- The second key escape groove; 66 - Second step structure; 67 - Second groove; 7 - Circuit board.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element. In addition, the terms "upper" and "lower" are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating that the referred device or component must have a specific orientation, so it should not be construed as a reference to the present invention. Invention limitations.

The features and performances of the present invention will be further described in detail below in conjunction with the embodiments.

The specific embodiment 1 of the thermostat of the present invention:

As shown in FIGS. 1 and 2 , the thermostat includes a panel part 101 and a bottom case part 102 , the panel part 101 includes an operation panel 4 , the operation panel 4 has a front side and a rear side, and the front side of the operation panel 4 faces when in use For the operator, the rear side of the operation panel 4 faces away from the operator during use; the rear side of the operation panel 4 is provided with a circuit board 7, and the circuit board 7 is provided with a switch circuit; Since the switch circuit is triggered when pressed, the number of key boards is four, three of which are small key boards 1 and the other one is large key board 2 .

As shown in FIG. 2 , the rear side of the operation panel 4 is provided with a first elastic member 5 and a second elastic member 6 . The first elastic member 5 applies forward elasticity to the small key board 1 when the small key board 1 is pressed backwards. When the large key board 2 is pressed backward, the second elastic member 6 exerts a forward elastic force on the large key board 2, which not only improves the operator's pressing touch, but also has a noise reduction effect.

As shown in FIG. 3 , a group of holes is provided on the operation panel 4 corresponding to each small key board 1 , and the group of holes includes a first snap hole 41 , a first button hole 42 , a first positioning hole 43 and a first Through holes 44 .

In this embodiment, the number of the first snap holes 41 is two. As shown in FIG. 9 and FIG. 11 , the small key board 1 is provided with a first snap 12 , and the first snap 12 is connected to the first snap hole. 41 correspond to one another, and the first snap 12 is inserted into the first snap hole 41 to realize snap connection, thereby realizing the installation of the small key board 1 on the operation panel 4 .

In this embodiment, the first button hole 42 is for the light touch button 3 to pass through, and the first button hole 42 corresponds to the first pressing protrusion 11 on the small key board 1 . The first pressing protrusion 11 presses the light touch button 3 to realize circuit conduction.

In this embodiment, the number of the first through holes 44 is four, and the first through holes 44 pass through the operation panel 4 in the front-rear direction. As shown in FIG. 5 and FIG. 6 , the first elastic member 5 includes a first base body 52 , The rear side of the first base body 52 is supported on the circuit board 7, and the first base body 52 is provided with a first avoidance hole 54, and the first avoidance hole 54 exposes the movable pressing part 32 of the touch button 3; The side protrusions are provided with first pushing protrusions 51, the first pushing protrusions 51 correspond to the first through holes 44 one-to-one, the first pushing protrusions 51 penetrate the first through holes 44, and the first pushing protrusions 51 The front end of the protrusion 51 exposes the first through hole 44 , so that the first pushing protrusion 51 is in contact with the small key board 1 . The outer peripheral surface of the first pushing protrusion 51 is a smooth surface.

In this embodiment, the number of the first positioning holes 43 is two, and the front side of the first base body 52 is further protruded with a first positioning column 53 . The first positioning column 53 corresponds to the first positioning hole 43 one-to-one. The positioning post 53 guides and cooperates with the first positioning hole 43 to prevent the first elastic member 5 from moving in a plane perpendicular to the front-rear direction. The first positioning post 53 and the first positioning hole 43 together constitute a positioning structure.

As shown in FIG. 6 , the first base body 52 has a first groove 57 with its opening facing back, that is, the opening of the first groove 57 faces away from the operation panel 4 . By arranging the first groove 57 on the first base body 52, the The first base body 52 is in the shape of a leather cup, so that the deformation amount of the first base body 52 can be increased, and the operator's tactile feeling can be further increased.

In this embodiment, the bottom wall of the first groove 57 is provided with a first key escape groove 55 , the first groove 57 and the first key escape groove 55 form a first stepped structure 56 , and the first escape hole 54 is provided at On the first key avoidance groove 55, the first key avoidance groove 55 corresponds to the light touch key 3 on the circuit board 7 to accommodate at least a part of the thickness of the light touch key 3, which can better avoid the light touch key 3 and the light touch key. The solder pins 31 of the key 3 avoid interference with the touch key 3 and the solder pins 31 of the touch key 3 when the first base 52 is elastically deformed.

As shown in FIG. 4 , positioning protrusions 49 are provided on the rear side of the operation panel 4 at positions corresponding to each of the first elastic members 5 , and the positioning protrusions 49 are arranged in pairs. The corresponding positioning of the first elastic member 5 not only facilitates the installation of the first elastic member 5 , but also can limit the position of the first elastic member 5 to avoid the arrangement direction of the first elastic member 5 in the two positioning protrusions 49 move.

As shown in FIG. 3 , a group of holes is provided on the operation panel 4 at a position corresponding to the large key board 2 , and the group of holes includes a second clamping hole 45 , a second button hole 46 , a second positioning hole 47 and a second through hole 48 . .

In this embodiment, the number of the second snap holes 45 is four. As shown in FIG. 10 and FIG. 11 , the large key board 2 is provided with a second snap 22 , and the second snap 22 is connected to the second snap hole. 45 correspond to one another, and the second snap 22 is inserted into the second snap hole 45 to realize snap connection, thereby realizing the installation of the large key board 2 on the operation panel 4 .

In this embodiment, the large key board 2 corresponds to two light touch keys 3, and the number of corresponding second key holes 46 is two, and the second key holes 46 allow the light touch keys 3 to pass through; the large key board 2 is provided with Two second pressing protrusions 21, two second pressing protrusions 21 are respectively disposed on both ends of the large key board 2, the second pressing protrusions 21 correspond to the second key holes 46 one-to-one, and the operator presses the large key. When the board 2 is pressed, the circuit is turned on by pressing the light touch button 3 through the second pressing protrusion 21 .

As shown in FIG. 10 , since the large key board 2 is long, a reinforcing rib 23 is provided in the middle position of the large key board 2 . The reinforcing rib can increase the strength of the large key board 2 and increase the service life of the large key board 2 . Wherein, the reinforcing rib 23 is an annular structure.

In this embodiment, the number of the second through holes 48 is four. The second through holes 48 pass through the operation panel 4 in the front-rear direction; the number of the second elastic members 6 is two, wherein the two second through holes 48 correspond to one For the second elastic member 6 , the other two second through holes 48 correspond to the other second elastic member 6 . Taking one of the second elastic members 6 and the two second through holes 48 as an example, as shown in FIG. 7 and FIG. 8 , the second elastic member 6 includes a second base body 62 , and the rear side of the second base body 62 is supported on the circuit On the board 7, the second base body 62 is provided with a second avoidance hole 64, the second avoidance hole 64 is for exposing the movable pressing part 32 of the touch button 3; the front side of the second base body 62 is protruded with a second push protrusion 61. The number of the second push protrusions 61 is two, the two second push protrusions 61 correspond to the two second through holes 48 one-to-one, and the second push protrusions 61 penetrate into the second through holes 48 , and the front end of the second pushing protrusion 61 exposes the second through hole 48 , so that the second pushing protrusion 61 is in contact with the large key board 2 . The outer peripheral surface of the second pushing protrusion 61 is a smooth surface.

In this embodiment, the first elastic member 5 and the second elastic member 6 are both made of silica gel. The silica gel material has a large deformation and has a noise reduction effect, which can reduce the feedback noise when the touch button 3 is pressed. In other embodiments, the first elastic member and the second elastic member may be made of other materials with better elasticity.

In this embodiment, the number of the second positioning holes 47 is four, wherein two second positioning holes 47 correspond to one second elastic member 6 , and the other two second positioning holes 47 correspond to another second elastic member 6 . Taking one of the second elastic members 6 to cooperate with the two second positioning holes 47 as an example, the front side of the second base body 62 is protruded with a second positioning column 63 , the number of the second positioning column 63 is two, and the two The two positioning columns 63 correspond to the two second positioning holes 47 one-to-one, and the second positioning columns 63 guide and cooperate with the second positioning holes 47 to prevent the second elastic member 6 from moving in a plane perpendicular to the front-rear direction. The second positioning column 63 and the second positioning hole 47 together constitute a positioning structure.

As shown in FIG. 8 , the second base 62 has a second groove 67 with its opening facing back, that is, the opening of the second groove 67 faces away from the operation panel 4 . By arranging the second groove 67 on the second base 62 , the The second base body 62 has a leather bowl structure, which can increase the deformation amount of the second base body 62 and further increase the operator's tactile feeling.

In this embodiment, the bottom wall of the second groove 67 is provided with a second key escape groove 65 , the second groove 67 and the second key escape groove 65 form a second stepped structure 66 , and the second escape hole 64 is provided at On the second key avoidance groove 65, the second key avoidance groove 65 corresponds to the light touch key 3 on the circuit board 7 to accommodate at least a part of the thickness of the light touch key 3, so that the second groove 67 can better avoid the light touch The button 3 and the soldering legs 31 of the light-touch button 3 avoid interference with the light-touch button 3 and the soldering legs 31 of the light-touch button 3 when the second base 62 is elastically deformed.

As shown in FIGS. 2 and 11 , taking the first elastic member 5 and the small key board 1 as an example, during assembly, the small key board 1 is clamped on the operation panel 4 from the front side of the operation panel 4 , and the first The elastic member 5 is installed on the operation panel 4 from the rear side of the operation panel 4. In this way, the first elastic member 5 will not occupy the space on the front side of the operation panel 4, so that the overall thickness of the operation panel 4 is small, which is conducive to temperature control. thinning of the device. Moreover, the first elastic member 5 is assembled on the operation panel 4 afterward, which requires less processing of the operation panel 4, and has the effects of simple structure and convenient installation.

The specific embodiment 2 of the thermostat of the present invention:

The difference from the specific embodiment 1 is that in the embodiment 1, there are avoidance holes on the base body, and the avoidance holes are used to avoid the light touch buttons on the circuit board, so as to trigger the light touch buttons when the operator presses the button board, so as to realize the circuit conduction. In this embodiment, there are no avoidance holes on the base body and no touch buttons on the circuit board, but conductive silica gel is provided on the back side of the base body, and a copper foil loop is arranged on the circuit board. When the operator presses the key board , the substrate is moved back, and the circuit is conducted through the conductive silica gel on the substrate, wherein the conductive silica gel constitutes a conductive layer.

In other embodiments, the touch buttons may be replaced by silicone buttons.

The specific embodiment 3 of the thermostat of the present invention:

The difference from the specific embodiment 1 is that in the embodiment 1, the base body has a groove with an opening facing backward, and the avoidance hole is arranged on the bottom wall of the groove. The base body has a good amount of deformation when it is pressed by the key board. In this embodiment, the base body is a solid body, and the avoidance hole is arranged at the center of the base body.

The specific embodiment 4 of the thermostat of the present invention:

The difference from the specific embodiment 1 is that in the embodiment 1, the front side of the base body is protruded with a positioning column, the operation panel is provided with a positioning hole, and the positioning column and the positioning hole are guided and assembled together to ensure that the base body will not be perpendicular to the In this embodiment, the rear side of the operation panel is protruded with a positioning column, and the base body is provided with a positioning hole. The positioning column and the positioning hole are guided and assembled together to ensure that the base body will not be perpendicular to the front and rear direction. move in the plane.

In other embodiments, a positioning rib plate may be provided on the rear side of the operation panel, the positioning rib plate forms an enclosing frame, and the base body is put into the enclosing frame as a whole to position the base body through the positioning rib plate to ensure that the base body will not be perpendicular to the front and rear. move in the direction of the plane.

The specific embodiment 5 of the thermostat of the present invention:

The difference from the specific embodiment 1 is that in the embodiment 1, an elastic member is provided on the operation panel at the position corresponding to each light touch button, and each elastic member is arranged separately to facilitate processing. In this embodiment, the operation panel is Only one elastic piece is provided on the elastic piece, and an avoidance hole, a positioning hole and a push protrusion are arranged on the elastic piece corresponding to the position of each light touch button.

The specific embodiment 6 of the thermostat of the present invention:

The difference from the specific embodiment 1 is that in the embodiment 1, the front end of the pushing protrusion is exposed outside the through hole to increase the length of the pushing protrusion, thereby ensuring a better deformation amount. In the case of a large amount of deformation, the front end of the pushing protrusion is retracted inside the through hole, and the key board is provided with a convex part. After the key board is installed on the operation panel, the convex part extends into the through hole for Push the protrusion on the top.

The specific embodiment 1 of the key structure of the present invention includes an elastic member, an operation panel and a key board. The elastic member, the operation panel and the key board in this embodiment are any of the above-mentioned specific embodiments 1 to 6 of the temperature controller. The structures of the first elastic member, the operation panel and the small key board are the same, and will not be repeated here.

The specific embodiment 2 of the key structure of the present invention, the key structure includes an elastic member, an operation panel and a key board, the elastic member, the operation panel and the key board in this embodiment are any of the above-mentioned specific embodiments 1 to 6 of the temperature controller The structures of one of the second elastic members, the operation panel and the large key board are the same, and will not be repeated here.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. Any equivalent structural changes made by using the contents of the description and drawings of the present invention, Similarly, all should be included in the protection scope of the present invention.

Claims (10)

1. A key structure comprising:

an operation panel having a front side and a rear side, the front side of the operation panel facing an operator when in use, the rear side of the operation panel facing away from the operator when in use;

a circuit board arranged at the rear side of the operation panel and provided with a switch circuit;

a key sheet provided on the front side of the operation panel and used for triggering the switch circuit when pressed;

it is characterized by also comprising:

the elastic piece is arranged on the rear side of the operation panel and used for applying forward elastic acting force to the key board, the elastic piece comprises a base body and a pushing bulge, the rear side of the base body is supported on the circuit board, and the pushing bulge is arranged on the base body in a forward protruding mode;

the push button comprises a push button plate, a push button boss and an elastic piece, wherein the push button plate is provided with a through hole, the through hole penetrates through the operation panel in the front-back direction, and the push button boss is inserted into the through hole so that the elastic piece bears the pressing of the push button plate when the push button plate is pressed down.

2. The key structure of claim 1, wherein the base has a rearwardly opening recess to provide the base with a cup-like configuration.

3. The key structure according to claim 1, wherein a positioning structure is provided between the elastic member and the operation panel, the positioning structure being configured to position the elastic member in a plane perpendicular to the front-rear direction.

4. The key structure according to claim 3, wherein the positioning structure comprises a positioning post and a positioning hole, the positioning post and the positioning hole are in positioning fit, the positioning post is arranged on one of the elastic member and the operation panel, and the positioning hole is arranged on the other of the elastic member and the operation panel.

5. The key structure according to any one of claims 1 to 4, wherein the outer peripheral surface of the pushing projection is a smooth surface.

6. The key structure according to any one of claims 1 to 4, wherein a tact key is provided on the circuit board, and the tact key is used for triggering the switch circuit;

the rear side face of the base body is provided with a key avoiding groove, and the key avoiding groove corresponds to the light touch key on the circuit board so as to accommodate at least part of the thickness of the light touch key.

7. The key structure according to claim 6, wherein the bottom of the key escape groove is provided with an escape hole for exposing the movable pressing portion of the tact key, and the bottom of the key escape groove covers a portion of the tact key.

8. The key structure of claim 2, wherein the switch circuit is a copper foil loop disposed on a circuit board;

and a conductive layer is arranged on the groove wall of the groove, or an independent silica gel key is arranged in front of the substrate and the circuit board, a conductive layer is arranged on the rear side of the silica gel key, and the conductive layer is used for triggering the copper foil loop.

9. The key structure according to any one of claims 1 to 4, wherein the elastic member is made of silicone.

10. The temperature controller comprises a panel part and a bottom shell part;

wherein the panel portion has the key structure of any of claims 1-9.

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