TWI555048B - Key switch structure - Google Patents

Description

Button structure

The present invention relates to a button structure, and more particularly to a button structure that provides a light touch.

Recently, keyboards have become a common input tool, and a plurality of buttons are provided on the keyboard to provide user presses for inputting characters, numbers, symbols, and the like. Depending on the specifications of the different products, some buttons are designed to provide the user with a tactile feeling when using the buttons, and the ease of assembly of the buttons with light touch is also important for manufacturing. index parameter. Therefore, how to design a button that provides a light touch and is easy to assemble has become one of the subjects of the industry.

The present invention provides a key structure that provides a light touch and is easy to assemble to solve the above problems.

In order to achieve the above object, the present invention discloses a button structure including a bottom plate, a circuit unit, a case member, a plunger member, a first wire and a second wire. The circuit unit is disposed on the bottom plate and has a first electrical contact and a second electrical contact, the cover member is detachably and rotatably mounted on the bottom plate, and the plunger member is movably disposed on the bottom plate The inside of the piece can be close to or away from the bottom plate. The first wire is fixed in the case member for electrically abutting the first electrical contact, and the second wire is fixed in the case member for electrically abutting the second electrical connection point. The first wire and the second wire are electrically connected when the plunger member approaches the bottom plate.

According to another embodiment of the present invention, the present invention further includes a first assembly slot formed on the bottom plate, and the button structure further includes a positioning arm and a first fixing leg extending from the bottom plate and located at the bottom plate. The first fixing leg is connected to the shell member and movably disposed in the first assembly slot. When the shell member is rotated to a first position in a first direction, the first fixing is fixed. The foot can be disengaged from the first assembly slot to disengage the case member from the bottom plate, and when the case member is rotated to a second position in a second direction opposite to the first direction, the first fixing leg is engaged with The first assembly slot and the positioning arm stop the first fixing leg to rotate in the first direction to fix the shell member to the bottom plate.

According to another embodiment of the present invention, the first wire has a first elastic portion, and the second wire has a second elastic portion. When the shell member is rotated to the second position, the first wire An elastic portion electrically abuts the first electrical contact, and the second elastic portion electrically abuts the second electrical contact.

According to another embodiment of the present invention, the first wire includes a first flexible portion extending from the first elastic portion, and the first flexible portion is fixed in the shell member, The second wire includes a second flexible portion extending from the second elastic portion, the second flexible portion being fixed in the case member. The button structure further includes a conductive member mounted in the plunger member, the conductive member contacting the first flexible portion and the second flexible portion during the approach of the plunger member relative to the bottom plate. The first electrical contact is electrically connected to the second electrical contact.

According to one embodiment of the present invention, the button structure further includes an assembly member for fixing the conductive member in the plunger member and being adjacent to the bottom plate or the plunger member Along with the assembly, the assembly is bent and deformed by the first flexible portion and the second flexible portion during the approach of the plunger member relative to the bottom plate.

According to one embodiment of the present invention, the present invention further discloses that the assembly has a first notch formed therein and a first guiding structure adjacent to the first notch, the conducting member having a first end. It is located at the bottom of the first notch and is exposed in the first notch. The first guiding structure guides the first flexible portion into the first missing slot during the approach of the plunger member relative to the bottom plate. The first flexible portion is elastically reset to abut the first end of the conductive member when entering the first notch.

According to one embodiment of the present invention, the present invention further discloses that the assembly has a second notch formed adjacent to the second notch and the second guiding structure adjacent to the second notch, the conducting member having opposite the first end a second end portion located at the bottom of the second notch and exposed to the second notch, the second guiding structure guiding the second flexibility during the approach of the plunger member relative to the bottom plate The portion enters the second notch, and the second flexible portion is elastically reset to abut the second end of the conductive member when entering the second notch.

In summary, the present invention utilizes the impact of the first flexible portion of the first wire on the first end of the assembly with the first end of the conductive member to impart feedback to the user and create a light touch. The present invention further utilizes the first end portion and the second end portion of the conductive member to respectively contact the first flexible portion of the first wire and the second flexible portion of the second wire during the approach of the plunger member toward the bottom plate, so that The first electrical contact of the circuit unit is electrically connected to the second electrical contact, thereby generating the button trigger signal. The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the embodiments of the invention.

The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation. Referring to FIG. 1 and FIG. 2, FIG. 1 is a schematic view showing the appearance of a key structure 1000 according to a first embodiment of the present invention, and FIG. 2 is a schematic exploded view of the key structure 1000 according to the first embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the button structure 1000 includes a bottom plate 1, a circuit unit, and a case member 3. The circuit unit 2 is disposed on the bottom plate 1 and has a first electrical contact 20 and a second The electrical contact 21, the case member 3 is detachably and rotatably mounted on the base plate 1. In addition, a first assembly slot 10 is formed on the bottom plate 1. The button structure 1000 further includes a positioning arm 11 and a first fixing leg 30. The positioning arm 11 extends from the bottom plate 1 and is located in the first assembly slot 10. The first fixing leg 30 is coupled to the case member 3 and movably disposed within the first assembly slot 10. Further, the first fixing leg 30 includes a first connecting rib 301 and a first engaging rib 302. The first connecting rib 301 is coupled to the shell member 3, and the first engaging rib 302 protrudes from the first connecting rib 301. The circuit unit 2 is disposed on the bottom plate. The circuit unit is printed on the bottom plate, which is also called a PCB board.

In addition, a second assembly slot 12, a third assembly slot 13 and a fourth assembly slot 14 are formed on the bottom plate 1. The button structure 1000 further includes a second fixing leg 31 and a third fixing leg 32. a fourth fixing leg 33, a second fixing leg 31, a third fixing leg 32 and a fourth fixing leg 33 are respectively connected to the case member 3 and are respectively movably disposed in the second assembly groove 12, the third assembly groove 13 and the first The four assembly slots 14 are inside. Further, the second fixing leg 31 includes a second connecting rib 310 connected to one of the shell members 3 and a second engaging rib 311 protruding from the second connecting rib 310. The third fixing leg 32 includes a connecting member. a third connecting rib 320 and a third engaging rib 321 protruding from the third connecting rib 320. The fourth fixing leg 33 includes a fourth connecting rib 330 connected to the shell member 3 and protruding from the fourth connecting portion. One of the ribs 330 has a fourth engaging rib 331.

Referring to FIG. 1 to FIG. 4 , FIG. 3 is a top plan view showing the button structure 1000 in a first state according to the first embodiment of the present invention, and FIG. 4 is a second state of the button structure 1000 according to the first embodiment of the present invention. A schematic view of the top. As shown in FIGS. 1 to 4, when the key structure 1000 is attached to one of the assembled positions as shown in FIG. 1 from one of the separated positions shown in FIG. 2, the first fixed leg 30 and the second fixed leg 31 are attached. The third fixing leg 32 and the fourth fixing leg 33 are respectively inserted into the first assembly groove 10, the second assembly groove 12, the third assembly groove 13 and the fourth assembly groove 14 on the bottom plate 1, that is, the case member 3 at this time Is in a first position as shown in FIG. 3, and then when the case member 3 is rotated from a first position shown in FIG. 3 in a second direction R2 to a second position as shown in FIG. The positioning arm 11 abuts the first connecting rib 301 , and the first engaging rib 302 is engaged with the bottom wall 101 of the first assembly slot 10 , so that the first fixing leg 30 can be engaged with the first assembly slot 10 . At this time, the positioning arm 11 can stop the first fixing leg 30 to rotate in a first direction R1 opposite to the second direction R2, so that the shell member 3 is fixed on the bottom plate 1, and at the same time, the second engaging rib 311 The second fixing leg 31 is engaged with the second assembly groove 12, and the third engaging rib 321 is engaged with the bottom wall 130 of the third assembly groove 13. Third fixed The leg 32 is engaged with the third assembly groove 13 , and the fourth engaging rib 331 is engaged with the bottom wall 140 of the fourth assembly groove 14 , so that the fourth fixing leg 33 is engaged with the fourth assembly groove 14 . In this way, the case member 3 can be fixed to the bottom plate 1.

In this embodiment, the positioning arm 11 is formed with a positioning groove 110, and the first connecting rib 301 has a positioning post 303 (as shown in FIG. 3 and FIG. 4). When the shell member 3 is rotated as shown in FIG. In the second position shown, the positioning post 303 is engaged in the positioning groove 110, so that the first fixing leg 30 can be more firmly fixed in the first assembly groove 10. The structural design of the present invention for fixing the first fixing leg 30 in the first assembly groove 10 is not limited to the embodiment shown in the drawings, and depends on actual needs.

On the contrary, when the case member 3 is rotated from the second position shown in FIG. 4 in the first direction R1 to the first position as shown in FIG. 3, the positioning arm 11 pushes the first connecting rib 301 to force the first The engaging rib 302 is disengaged from the first assembling groove 10, whereby the first fixing leg 30 can be disengaged from the first assembling groove 10 to disassemble the case member 3 to the bottom plate 1, and at the same time, the second engaging rib 311 is separated from the second The bottom wall 120 of the slot 12 is assembled, so that the second fixing leg 31 can be disengaged from the second assembly slot 12, and the third engaging rib 321 is separated from the bottom wall 130 of the third assembly slot 13, so that the third fixing leg 32 can be assembled by the third assembly. The slot 13 is disengaged, and the fourth engaging rib 331 is separated from the bottom wall 140 of the fourth assembly slot 14 so that the fourth fixing leg 33 can be disengaged from the fourth assembly slot 14. In this way, the shell member 3 of the button structure 1000 can be detachably mounted on the bottom plate 1 by the rotational fit between the fixing leg and the assembly groove to increase the convenience of the button structure 1000 during assembly.

Referring to FIG. 5 to FIG. 7 , FIG. 5 is a schematic exploded view of the button structure 1000 according to the first embodiment of the present invention, and FIG. 6 is a schematic exploded view of the button structure 1000 according to the first embodiment of the present invention. The figure is a schematic view of the key structure 1000 of the first embodiment of the present invention in the assembled state. As shown in FIG. 5 to FIG. 7 , the button structure 1000 further includes a first wire 4 , a second wire 5 , a plunger member 6 , a conductive member 7 , a key cap 8 , an assembly 9 , and a Elastic member A. The first wire 4 and the second wire 5 are both fixed in the shell member 3, the plunger member 6 is movably disposed in the shell member 3, and the key cap 8 is coupled to the plunger member 6 to provide a user press. The plunger member 6 can be brought close to the bottom plate 1, that is, when the key cap 8 is pressed, the key cap 8 can drive the plunger member 6 to approach the bottom plate 1 in a first vertical direction Y1.

In addition, the button structure 1000 may further include a shell base B disposed on the bottom plate 1 for carrying the elastic member A. The two ends of the elastic member A respectively abut the plunger member 6 and the shell base B to drive the plunger member 6 away from the shell base B, that is, when the key cap 8 is released by the user, the elastic member A can drive the column The plug member 6 is spaced apart from the case base B in a second perpendicular direction Y2 opposite to the first vertical direction Y1, whereby the plunger member 6 can be reset away from the case base B after the key cap 8 is released. It is worth mentioning that the elastic member A of the present invention can also directly abut the bottom plate 1, depending on actual needs.

It is worth mentioning that the key cap 8 has a first engaging structure 80, the plunger member 6 has a second engaging structure 60, and the through hole 34 is formed in the shell member 3, the first engaging structure 80 and the second The engaging structures 60 are engaged with each other via the through holes 34 to connect the key cap 8 to the plunger member 6. In addition, an accommodating space 35 is formed in the case member 3, which communicates with the through hole 34, and the plunger member 6 is movably disposed in the accommodating space 35, so that the plunger member 6 can be close to or away from the bottom plate 1.

In addition, the assembly 9 is used to secure the conductive member 7 in the plunger member 6, so that the conductive member 7 can be mounted in the plunger member 6 and can be moved toward or away from the bottom plate 1 with the plunger member 6. Further, the first wire 4 includes a first elastic portion 40 and a first flexible portion 41. The second wire 5 includes a second elastic portion 50 and a second flexible portion 51. The first flexible portion 41 extends. The first flexible portion 40 is fixed in the case member 3 , and the second flexible portion 51 extends from the second elastic portion 50 and is fixed in the case member 3 . In this embodiment, the first flexible portion 41 and the second flexible portion 51 can each be substantially an L-shaped structure, but the invention is not limited thereto. Further, after the shell member 3 is assembled to the assembled position as shown in FIG. 7 with respect to the bottom plate 1, the first elastic portion 40 of the first wire 4 electrically abuts the first electrical contact 20 of the circuit unit 2 The second elastic portion 50 of the second wire 5 electrically abuts against the second electrical contact 21 of the circuit unit 2 .

Please refer to FIG. 8 to FIG. 10 . FIG. 8 is a top plan view showing the button structure 1000 in a released state according to the first embodiment of the present invention, and FIG. 9 is a cross-sectional view of the button structure 1000 shown in FIG. 8 along a section line XX. Figure 10 is a cross-sectional view of the button structure 1000 shown in Figure 8 along section line YY. As shown in FIG. 8 to FIG. 10, the assembly member 9 is formed with a first notch 90, a guiding structure 91 adjacent to the first notch 90, and a second notch 92. The conductive member 7 has a first portion. An end portion 70 and a second end portion 71 opposite to the first end portion 70, the first end portion 70 is located at the bottom of the first notch 90 and is exposed at the first notch 90, and the second end portion 71 is located at the second notch The bottom of 92 is exposed to the second notch 92. In this embodiment, the guiding structure 91 can be a slope.

As can be seen from Fig. 10, when the keycap 8 is pressed by the release position shown in Fig. 10, the key cap 8 drives the plunger member 6 to approach the bottom plate 1 in the first vertical direction Y1, that is, when the plunger member 6 During the approach of the bottom plate 1, the plunger member 6 will bring the assembly 9 and the conductive member 7 closer to the bottom plate 1. During the approach of the plunger member 6 relative to the bottom plate 1, the guiding structure 91 of the assembly 9 will hit the first flexible portion 41 of the first wire 4 earlier than the first end portion 70 of the conductive member 7. Therefore, during the approach of the plunger member 6 toward the bottom plate 1 and when the guiding structure 91 of the assembly member 9 contacts the first flexible portion 41 of the first wire 4, the first flexible portion 41 will follow the guiding structure. 91 (ie, the inclined surface) slides, whereby the assembly 9 can push the first flexible portion 41 to be bent and deformed relative to the first elastic portion 40 until the first flexible portion 41 is disengaged from the guiding structure 91 (ie, the inclined surface) Entering the first notch 90 of the assembly member 9, the first flexible portion 41 bent and deformed can release the potential energy to be reset, thereby hitting and abutting against the first end portion 70 of the conductive member 7, and the first wire The impact of the first flexible portion 41 of the fourth flexible portion 41 with the first end portion 70 of the conductive member 7 can impart a tactile feeling to the user.

Meanwhile, in the process of the plunger member 6 approaching the bottom plate 1, the second flexible portion 51 of the second wire 5 can enter the second notch 92 of the assembly 9 to abut the second end of the conductive member 7. 71. In this way, the first electrical contact 20 of the circuit unit 2 can be electrically connected to the second electrical contact 21 via the first wire 4, the conductive member 7 and the second wire 5, thereby generating a button trigger signal. In other words, the first end portion 70 and the second end portion 71 of the conductive member 7 respectively contact the first flexible portion 41 and the second conductive line 5 of the first wire 4 during the approach of the plunger member 6 toward the bottom plate 1. The second flexible portion 51 is configured to turn on the first electrical contact 20 of the circuit unit 2 to the second electrical contact 21 to generate the button trigger signal.

Please refer to FIG. 11 to FIG. 13 , FIG. 11 is a schematic exploded view of a button structure 1000 ′ according to a second embodiment of the present invention, and FIG. 12 is a front view of a button structure 1000 ′ according to a second embodiment of the present invention, FIG. A rear view of the key structure 1000' of the second embodiment of the present invention. In order to clearly show that the button structure 1000' is actuated, FIGS. 12 and 13 omits the keycap and the shell member. As shown in FIGS. 11 to 13, the main difference between the button structure 1000' and the above-described button structure 1000 is that a plunger member 6' of the button structure 1000' is formed with a notch 61, a first flexible portion 41' of a first wire 4' of the button structure 1000' and a second portion of a second wire 5' The flexible portions 51' are accommodated in the notches 61 and are separated from each other (as shown in Fig. 13). During the approach of the plunger member 6' relative to the bottom plate 1, the groove wall of the notch 61 drives the first The flexible portion 41 ′ contacts the second flexible portion 51 ′ to electrically connect the first electrical contact 20 of the circuit unit 2 to the second electrical contact 21 , thereby generating the button trigger signal.

In other words, when the plunger member 6' is close to the bottom plate 1, the first flexible portion 41' and the second flexible portion 51' of the button structure 1000' are subjected to the groove wall of the notch 61 of the plunger member 6'. The drive is in direct contact, so the button structure 1000' can omit the arrangement of the conductive members. In addition, a shell base B' of the button structure 1000' has a retaining wall B0, and an assembly 9' of the button structure 1000' can be a shrapnel (as shown in FIGS. 11 and 12). During the approach of the piece 6' relative to the bottom plate 1, the assembly member 9' (i.e., the spring piece) will first contact the upper edge of the retaining wall B0, and when the plunger member 6' continues to approach the bottom plate 1, the retaining wall B0 can be pushed. The assembly 9' is pressed to give the user a feeling of light touch when pressed.

In this embodiment, the assembly 9' (ie, the elastic piece) can be made of a metal material, and the material of the assembly 9' of the present invention is not limited thereto. For example, please refer to FIG. 14, and FIG. 14 is the first embodiment of the present invention. A front view of a three-button structure 1000''. As shown in FIG. 14, the main difference between the button structure 1000'' and the button structure 1000' is that an assembly 9'' of the button structure 1000'' can be made of a plastic material, and in this embodiment, A plunger member 6" of the button structure 1000" can be integrally formed with the assembly member 9". The components of the embodiment having the same reference numerals as in the above embodiments have the same structural design and function principle, and are not described herein for brevity.

Referring to FIG. 15, FIG. 15 is a front elevational view showing a key structure 1000'' of a fourth embodiment of the present invention. As shown in FIG. 15, the main difference between the button structure 1000''' and the above-mentioned button structures 1000', 1000'' is that an assembly 9"' of the button structure 1000"' is a spring, and the assembly 9''' has a contact portion 93 and an abutting portion 94. The abutting portion 94 protrudes from the abutting portion 93 and abuts against the retaining wall B0 of the shell base B', and the plunger member 6' is opposite to the bottom plate 1. During the approach, the plunger member 6' compresses the assembly 9"" (i.e., the spring), and since the abutment portion 94 abuts against the retaining wall B0 of the housing base B', the assembly 9"' The ends of the spring (i.e., the spring) are respectively deflected by the pressing of the plunger member 6' and the retaining wall B0, and when the plunger member 6' continues to approach the bottom plate 1, the assembly 9'" is bucked. When the state exceeds a collapse state, the assembly 9"" can drive the abutment portion 94 over the retaining wall B0 and thereby release the elastic position energy to drive the abutting portion 93 to contact the bottom of the shell base B', so that when the user presses Feel the touch of touch. In this embodiment, the case base B' may be made of a metal material, but the invention is not limited thereto. Compared with the prior art, the present invention utilizes the first flexible portion of the first wire to collide with the first end of the conductive member when entering the first notch of the assembly to feed back the user and generate a light touch . The present invention further utilizes the first end portion and the second end portion of the conductive member to respectively contact the first flexible portion of the first wire and the second flexible portion of the second wire during the approach of the plunger member toward the bottom plate, so that The first electrical contact of the circuit unit is electrically connected to the second electrical contact, thereby generating the button trigger signal. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

1000, 1000', 1000'', 1000'''‧‧‧ button structure
1‧‧‧floor
10‧‧‧First assembly slot
101‧‧‧ bottom wall
11‧‧‧ positioning arm
110‧‧‧ positioning groove
12‧‧‧Second assembly slot
120‧‧‧ bottom wall
13‧‧‧ Third assembly slot
130‧‧‧ bottom wall
14‧‧‧fourth assembly slot
140‧‧‧ bottom wall
2‧‧‧ circuit unit
20‧‧‧First electrical contact
21‧‧‧Second electrical contacts
3‧‧‧Shell
30‧‧‧First fixed foot
301‧‧‧First connecting rib
302‧‧‧First engagement rib
303‧‧‧Positioning column
31‧‧‧Second fixed foot
310‧‧‧Second connection rib
311‧‧‧Second engaging rib
32‧‧‧ third fixed foot
320‧‧‧ third connecting rib
321‧‧‧3rd rib
33‧‧‧Four fixed feet
330‧‧‧fourth connecting rib
331‧‧‧4th rib
34‧‧‧through hole
35‧‧‧ accommodating space
4, 4'‧‧‧ first wire
40‧‧‧First Elastic Department
41, 41'‧‧‧First Flexibility
5, 5'‧‧‧ second wire
50‧‧‧Second elastic department
51, 51'‧‧‧ Second Flexure
6,6',6''‧‧‧Plunger parts
60‧‧‧Second snap-in structure
61‧‧‧ Missing slots
7‧‧‧Transmission parts
70‧‧‧ first end
71‧‧‧second end
8‧‧‧Key Cap
80‧‧‧First engagement structure
9, 9', 9'', 9'''‧‧‧ assembly
90‧‧‧First missing slot
91‧‧‧Guide structure
92‧‧‧Second missing slot
93‧‧‧ Touching Department
94‧‧‧Apartment
A‧‧‧Flexible parts
B, B'‧‧‧ shell base
B0‧‧‧Retaining wall
Y1‧‧‧ first vertical direction
Y2‧‧‧ second vertical direction
XX, YY‧‧‧ hatching

Fig. 1 is a schematic view showing the appearance of a key structure of a first embodiment of the present invention. Fig. 2 is a schematic exploded view of the key structure of the first embodiment of the present invention. FIG. 3 is a top plan view showing the key structure of the first embodiment of the present invention in a first state. Figure 4 is a top plan view showing the key structure of the first embodiment of the present invention in a second state. Fig. 5 is a schematic exploded view of the key structure of the first embodiment of the present invention. Figure 6 is a schematic exploded view of the key structure of the first embodiment of the present invention from another perspective. Figure 7 is a schematic view showing the key structure of the first embodiment of the present invention in the assembled state. Figure 8 is a top plan view showing the key structure of the first embodiment of the present invention in a released state. Figure 9 is a schematic cross-sectional view of the button structure shown in Figure 8 along section line X-X. Figure 10 is a schematic cross-sectional view of the button structure shown in Figure 8 along section line Y-Y. Figure 11 is a schematic exploded view of the key structure of the second embodiment of the present invention. Figure 12 is a front elevational view showing the key structure of the second embodiment of the present invention. Figure 13 is a rear elevational view showing the key structure of the second embodiment of the present invention. Figure 14 is a front elevational view showing the key structure of the third embodiment of the present invention. Figure 15 is a front elevational view showing the key structure of the fourth embodiment of the present invention.

1000‧‧‧Key structure

1‧‧‧floor

2‧‧‧ circuit unit

3‧‧‧Shell

30‧‧‧First fixed foot

33‧‧‧Four fixed feet

4‧‧‧First wire

40‧‧‧First Elastic Department

41‧‧‧First Flexibility

5‧‧‧Second wire

50‧‧‧Second elastic department

51‧‧‧Second flexible part

6‧‧‧Plunger parts

60‧‧‧Second snap-in structure

61‧‧‧ accommodating space

7‧‧‧Transmission parts

70‧‧‧ first end

71‧‧‧second end

8‧‧‧Key Cap

80‧‧‧First engagement structure

9‧‧‧Assemblies

90‧‧‧First missing slot

91‧‧‧Guide structure

92‧‧‧Second missing slot

A‧‧‧Flexible parts

B‧‧‧Shell base

Y1‧‧‧ first vertical direction

Y2‧‧‧ second vertical direction

Claims (18)

A button structure comprising: a bottom plate; a circuit unit disposed on the bottom plate and having a first electrical contact and a second electrical contact, a case member detachably and rotatably mounted On the bottom plate; a plunger member movably disposed in the housing member and adjacent to or away from the bottom plate; a first wire fixed in the case member for electrically abutting the a first electrical contact; and a second wire fixed in the case member for electrically abutting the second electrical contact; wherein, when the plunger member approaches the bottom plate, the first wire The wire and the second wire are electrically connected. The button structure of claim 1, wherein the bottom plate is formed with a first assembly slot, and the button structure further comprises: a positioning arm extending from the bottom plate and located in the first assembly slot; and a first a fixing leg connected to the shell member and movably disposed in the first assembly groove, the first fixing leg being detachable from the first assembly slot when the shell member is rotated to a first position in a first direction Disengaging, the case member is disengaged from the bottom plate, and when the case member is rotated to a second position in a second direction opposite to the first direction, the first fixing leg is engaged with the first assembly slot and the The positioning arm stops the first fixing leg to rotate in the first direction to fix the shell member to the bottom plate. The key structure of claim 2, wherein the first fixing leg comprises: a first connecting rib connected to the shell member; and a first engaging rib protruding from the first connecting rib when When the shell member is rotated to the first position, the positioning arm pushes the first connecting rib to disengage the first engaging rib from the first assembling groove, when the shell member rotates to the second position, the Positioning arm abuts the first connecting rib to make the first A snap rib is engaged with a bottom wall of one of the first assembly slots. The button structure of claim 3, wherein the positioning arm is formed with a positioning groove, the first connecting rib has a positioning post, and when the housing member is rotated to the second position, the positioning post is engaged with the button Position the groove. The button structure of claim 2, wherein a second assembly slot, a third assembly slot and a fourth assembly slot are further formed on the bottom plate, and the button structure further comprises: a second fixing leg connected The cover member is movably disposed in the second assembly groove; a third fixing leg connected to the case member and movably disposed in the third assembly groove; and a fourth fixing leg connected to the second fixing leg The cover member is movably disposed in the fourth assembly slot, and when the cover member is rotated to the first position, the second fixing leg can be disengaged from the second assembly slot, and the third fixing leg can be assembled by the third assembly The slot is disengaged, and the fourth fixing leg is detachable from the fourth assembly slot. When the shell member is rotated to the second position, the second fixing leg is engaged with the second assembly slot, and the third fixing leg is engaged. And the fourth fixing groove is engaged with the fourth assembly groove. The button structure of claim 5, wherein the second fixing leg comprises a second connecting rib connected to the one of the shell members and a second engaging rib protruding from the second connecting rib, the third fixing leg a third connecting rib connected to one of the shell members and a third engaging rib protruding from the third connecting rib, the fourth fixing leg comprising a fourth connecting rib connected to the shell member and protruding from a fourth engaging rib of the fourth connecting rib, when the shell member is rotated to the first position, the second engaging rib is separated from a bottom wall of the second assembling groove, and the third engaging rib is separated a bottom wall of the third assembly slot, the fourth engaging rib is separated from a bottom wall of the fourth assembly slot, and when the housing member is rotated to the second In the position, the second engaging rib is engaged with the bottom wall of the second assembly groove, the third engaging rib is engaged with the bottom wall of the third assembly groove, and the fourth engaging rib is engaged The bottom wall of the fourth assembly tank. The button structure of claim 2, wherein the first wire has a first elastic portion, and the second wire has a second elastic portion, the first elastic portion when the case member is rotated to the second position Electrically abutting the first electrical contact, and the second elastic portion electrically abuts the second electrical contact. The button structure of claim 7, wherein the first wire includes a first flexible portion extending from the first elastic portion, the first flexible portion being fixed in the case member, the second wire The second flexible portion is disposed in the second elastic portion, the second flexible portion is fixed in the shell member, and the button structure further comprises: a conductive member mounted on the plunger member The conductive member contacts the first flexible portion and the second flexible portion during the approach of the plunger member relative to the bottom plate, such that the first electrical contact is electrically connected to the second electrical contact. The button structure of claim 8, further comprising: an assembly member for fixing the conductive member in the plunger member and being movable toward or away from the bottom plate with the plunger member, the assembly The first flexible portion and the second flexible portion are bent and deformed during the process of the plunger member being close to the bottom plate. The button structure of claim 9, wherein the assembly has a first notch and a guiding structure adjacent to the first notch, the conducting member having a first end located at the first Missing the bottom of the groove and exposing to the first notch, when the plunger member is close to the bottom plate, the The first guiding structure guides the first flexible portion into the first notch, and the first flexible portion is elastically reset to abut the first end of the conductive member when entering the first notch. The button structure of claim 10, wherein the conductive member has a second end opposite the first end portion that is exposed on one side of the assembly, in the process of approaching the plunger member relative to the bottom plate The second flexible portion abuts the second end of the conductive member. The button structure of claim 11, wherein the first guiding structure is a slope, and the first flexible portion slides along the inclined surface relative to the first elasticity during the approach of the plunger member relative to the bottom plate The part is bent and deformed. The button structure of claim 8, wherein the first flexible portion and the second flexible portion are each substantially an L-shaped structure. The button structure of claim 1, further comprising an elastic member, the two ends of which respectively abut the plunger member and the bottom plate, and the elastic member drives the plunger member away from the bottom plate. The button structure of claim 14, further comprising a case base mounted on the bottom plate for carrying the elastic member. The button structure of claim 1, further comprising a key cap coupled to the plunger member, the key cap driving the plunger member to be adjacent to the bottom plate when pressed. The key structure of claim 16, wherein the key cap has a first engaging structure, The plunger member has a second engaging structure, and the through hole is formed in the shell member, and the first engaging structure and the second engaging structure are engaged with each other via the through hole. The button structure of claim 17, wherein an accommodating space is formed in the case member, and the accommodating portion is movably disposed in the accommodating space.