CN103152026A - Touch button device and projection device - Google Patents

Abstract

A touch key device and a projection device are provided, wherein the touch key device comprises a shell, a circuit board and a backlight module. The shell is provided with at least one key image, one surface of the circuit board attached to the shell is provided with at least one notch, and the backlight module is accommodated in the notch. The projection device comprises the touch key device. By the design of the embodiment, the circuit board is provided with the notch for accommodating the backlight module, and the backlight module is accommodated in the notch when being assembled, so that the overall thickness of the touch key device can be effectively reduced, and the touch key device is thinner than the existing design.

Description

Touch key device and projection device

【Technical field】

The present invention relates to a touch key device, in particular to a thin touch key device and a projection device.

【Background technique】

The current consumer products on the market usually need to meet the design requirements of being thin, light and small. Therefore, for a touch key device with backlight function, the overall thickness after assembly must be minimized as much as possible. As shown in FIGS. 4A and 4B , in an existing design, the touch key device 100 mainly consists of a housing 102 (thickness A) with a key image, a circuit board 104 (thickness B) and a backlight module 106 (thickness C ) three components are stacked, and the circuit board 104 is disposed between the casing 102 and the backlight module 106, so the total thickness of the touch key device 100 after assembly is (A+B+C). As shown in Figures 5A and 5B, in another existing design, the touch key device 110 is also composed of a housing 112 (thickness A), a circuit board 114 (thickness B), and a backlight module 116 (thickness B) with a key image. C) Three components are stacked, and the backlight module 116 is disposed between the casing 112 and the circuit board 114 , so the total thickness of the touch key device 110 after assembly is also (A+B+C). As shown in Figures 6A and 6B, in another existing design, the touch key device 130 is mainly composed of a housing 132 (thickness A) with a key image, a circuit board 134 (thickness B) and a reflector 136 (thickness B). D) Three components are stacked, so the total thickness of the touch key device 130 after assembly is (A+B+D). However, the total thickness of each of the above-mentioned conventional touch button devices is the sum of the three elements, so that the overall thickness cannot be further reduced.

China Taiwan Patent Publication No. 200919282 discloses a button structure including a casing, a circuit board and a touch module, and the touch module includes a sensing element, a light emitting element and a light transmitting element. US Patent Publication No. 7309132 discloses a key module of a projector, which includes a key, a circuit board, a support plate and a projection device housing. Taiwan Patent Publication No. I282936 discloses a touch panel, which includes a housing frame, a plate-shaped light guide, a chassis, a buffer component, a light reflection component, a polarizer, a display device, and a rod-shaped light source.

【Content of invention】

The invention provides a thin touch key device with low thickness.

Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention. To achieve one or part or all of the above objectives or other objectives, an embodiment of the present invention provides a touch key device, which includes a housing, a circuit board and a backlight module. The casing has at least one button image, the circuit board is attached to one side of the casing and has at least one gap, and the backlight module is accommodated in the gap.

In one embodiment, the circuit board has a base and a first side and a second side with a distance from each other and perpendicular to the base, and the base, the first side and the second side define a notch.

In one embodiment, the total thickness of the touch key device after assembly is approximately equal to the total thickness of the casing and the backlight module.

In one embodiment, the circuit board has at least one touch sensing circuit and is electrically connected to the backlight module. The touch sensing circuit can be a capacitive sensing circuit or a resistive sensing circuit.

In one embodiment, an adhesive tape is pasted on the side of the circuit board facing away from the housing and covering the backlight module.

In one embodiment, the position of the button image corresponds to the touch sensing circuit, the button image can be a laser engraved image, and the button image can be formed by a light-transmitting area.

Another embodiment of the present invention provides a projection device, which includes a touch key device, a projection housing, a projection light source, an imaging module, and a projection lens block. The touch key device is arranged on the projection housing and includes a shell with at least one key image, a circuit board and a backlight module. The circuit board is attached to one side of the casing and has at least one gap, and the backlight module is accommodated in the gap, the projection light source is arranged in the projection casing and is used to emit a light beam, and the imaging module is arranged in the projection casing and is used to emit the light beam of the projection light source It is modulated into an image beam, and the projection lens block is arranged in the projection housing to receive and project the image beam.

In summary, the touch key device according to the embodiment of the present invention has at least one of the following advantages:

With the design of the above embodiment, because the circuit board is designed with a gap for accommodating the backlight module, when the backlight module is accommodated in the gap during assembly, the overall thickness of the touch key device can be effectively reduced, so that the touch key device and the existing There are designs that become thinner in comparison.

Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention. In order to make the above and other objects, features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

【Description of drawings】

FIG. 1 is an exploded schematic diagram of components of a touch key device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the touch key device of FIG. 1 after assembly.

3A-3D are schematic diagrams of an assembly embodiment of the touch key device of the present invention.

FIG. 3E shows a schematic diagram of a touch key device disposed on a projection device according to an embodiment of the present invention.

FIG. 4A is an exploded schematic diagram of components of a conventional touch key device.

FIG. 4B is a schematic diagram of the touch key device of FIG. 4A after assembly.

FIG. 5A is an exploded schematic diagram of components of another conventional touch key device.

FIG. 5B is a schematic diagram of the touch key device of FIG. 5A after assembly.

FIG. 6A is an exploded schematic diagram of components of another conventional touch key device.

FIG. 6B is a schematic diagram of the touch key device of FIG. 6A after assembly.

10 touch button device

12 Shell

121 Substrate

122 button image

14 circuit board

14a Circuit board base

14b First side of circuit board

14c Circuit board second side

141 touch sensing circuit

16 backlight module

161 light source

162 light guide plate

22 power cord

24 Tape

30 projection device

32 projection shell

34 projection light source

36 imaging modules

38 projection lens block

100, 110 touch key device

102, 112 shell

104, 114 circuit board

106, 116 backlight module

130 touch button device

132 shell

134 circuit board

136 reflector

A shell thickness

B PCB thickness

C Backlight module thickness

D reflector thickness

I Beam

IM image beam

V notch

【Detailed ways】

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.

As shown in FIGS. 1 and 2 , a touch key device 10 includes a housing 12 , a circuit board 14 and a backlight module 16 . The housing 12 has a substrate 121 and at least one button image (icon) 122 , and the button icon 122 can be formed on the substrate 121 by laser engraving, for example. The circuit board 14 is attached to one side of the housing 12 and has at least one notch V. In this embodiment, the circuit board 14 may have a base 14a and a first side 14b and a second side with a distance from each other and perpendicular to the base 14a. A notch V can be defined by the side portion 14c, the base portion 14a, the first side portion 14b and the second side portion 14c. The circuit board 14 has a touch sensing circuit 141 and a sensing range (not shown), and the circuit board 14 is electrically connected to the backlight module 16 . The position of the button image 122 corresponds to the touch sensing circuit 141, which is further illustrated as the position of the button image 122 corresponding to the sensing range of the touch sensing circuit 141, and the touch sensing circuit 141 can be a capacitive sensing circuit or a Resistive sensing circuits are acceptable. The backlight module 16 may include a light source 161 and a light guide plate 162 , the light guide plate 162 is used to guide a light beam emitted by the light source 161 . In one embodiment, the button image 122 itself can be formed by, for example, a light-transmitting area and other areas of the housing 12 can be a low-transmittance coating. When the light emitted by the backlight module 16 passes through the housing 12, the light is filtered by the coating The button image 122 can be displayed, because the position of the button image 122 corresponds to the sensing range of the touch sensing circuit 141 , when the user presses the button image 122 with force, it only needs to be within the sensing range to send out a signal. With the design of this embodiment, the backlight module 16 accommodated in the gap V of the circuit board 14 can reduce the overall thickness after assembly. As shown in FIG. 2 , assuming that the thickness of the casing 12 is A, the thickness of the circuit board 14 is B and the thickness of the backlight module 16 is C, when the backlight module 16 is accommodated in the gap V of the circuit board 14, the touch key device 10 The total thickness of can be (A+C), so that the thickness B of the circuit board 14 can be subtracted, so that the touch key device 10 becomes thinner compared with the existing design.

Please refer to FIGS. 3A to 3D. In an assembly embodiment, the circuit board 14 is first attached flat and fixed to an inner surface of the housing 12 (FIG. 3A), and then the backlight module 16 is fitted into the notch V of the circuit board 14 ( FIG. 3B), and connect the power cord 22 of the backlight module 16 to the circuit board 14 (FIG. 3C), and then use a piece of adhesive tape 24 to paste it on the side of the circuit board 14 facing away from the housing 12 and cover the backlight module 16 (FIG. 3D), The effect of fixing the circuit board 14 and the backlight module 16 can be obtained. It should be noted that the formation method and position of the above-mentioned notch V are not limited at all, it only needs to be able to accommodate the backlight module 16 to reduce the thickness of the finished product.

FIG. 3E shows a schematic diagram of a touch key device disposed on a projection device according to an embodiment of the present invention. As shown in FIG. 3E , the projection device 30 includes a touch key device 10 , a projection housing 32 , a projection light source 34 , an imaging module 36 and a projection lens block 38 . The touch key device 10 is disposed on the projection housing 32 and includes a casing 12 having at least one key image, a circuit board 14 and a backlight module 16 (as shown in FIG. 2 ). The projection light source 34 is arranged in the projection housing 32 and is used to emit a light beam I, the imaging module 36 is arranged in the projection housing 32 and is used to adjust the light beam I into an image beam IM, and the projection lens block 38 is arranged in the projection housing The body 32 receives and projects the image beam IM.

In summary, the touch key device according to the embodiment of the present invention has at least one of the following advantages:

With the design of the above embodiment, because the circuit board is designed with a gap for accommodating the backlight module, when the backlight module is accommodated in the gap during assembly, the overall thickness of the touch key device can be effectively reduced, so that the touch key device and the existing There are designs that become thinner in comparison.

The above is only a preferred embodiment of the present invention, and should not limit the scope of the present invention, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the description of the invention are still the same. It is within the scope covered by the patent of the present invention. In addition, any embodiment or scope of claims of the present invention does not need to achieve all the objectives or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist the search of patent documents, and are not used to limit the scope of rights of the present invention. In addition, terms such as “first side portion” and “second side portion” mentioned in this specification or the scope of the patent application are only used to name elements or to distinguish different embodiments or ranges, and are not used to limit the number of elements upper or lower limit.

Claims (22)

1. A touch button device, comprising: A shell with at least one button image; a circuit board attached to one side of the housing and having at least one notch; and A backlight module is accommodated in the gap. 2. The touch key device according to claim 1, wherein the circuit board has a base and a first side and a second side perpendicular to the base with a distance from each other, and the base, the first The notch is defined by the side portion and the second side portion. 3. The touch key device as claimed in claim 1, wherein the total thickness of the touch key device after assembly is equal to the sum of the thickness of the casing and the backlight module. 4. The touch key device as claimed in claim 1, wherein the circuit board has at least one touch sensing circuit. 5. The touch key device as claimed in claim 4, wherein the touch sensing circuit is a capacitive sensing circuit or a resistive sensing circuit. 6. The touch key device as claimed in claim 4, wherein the touch sensing circuit has a sensing range. 7. The touch key device as claimed in claim 1, wherein the circuit board is electrically connected to the backlight module. 8. The touch key device according to claim 1, further comprising: An adhesive tape is pasted on the side of the circuit board facing away from the shell and covers the backlight module. 9. The touch key device as claimed in claim 1, wherein the position of the key image corresponds to the touch sensing circuit. 10. The touch key device as claimed in claim 1, wherein the key image is a laser engraved image. 11. The touch key device according to claim 1, wherein the key image is formed by a light-transmitting area. 12. A projection device comprising: a projection shell; A touch key device is arranged on the projection housing and the touch key device includes: A shell with at least one button image; a circuit board attached to one side of the housing and having at least one notch; and a backlight module accommodated in the gap; A projection light source is arranged in the projection housing and used to emit a light beam; An imaging module is arranged in the projection housing and is used for modulating the homogenized light beam into an image light beam; and A projection lens block is arranged in the projection housing and receives and projects the image light beam. 13. The projection device as claimed in claim 12, wherein the circuit board has a base and a first side and a second side which are perpendicular to the base with a distance from each other, and the base, the first side And the second side portion defines the notch. 14. The projection device as claimed in claim 12, wherein the total thickness of the touch key device after assembly is equal to the total thickness of the casing and the backlight module. 15. The projection device as claimed in claim 12, wherein the circuit board has at least one touch sensing circuit. 16. The projection device as claimed in claim 15, wherein the touch sensing circuit is a capacitive sensing circuit or a resistive sensing circuit. 17. The projection device as claimed in claim 15, wherein the touch sensing circuit has a sensing range. 18. The projection device as claimed in claim 12, wherein the circuit board is electrically connected to the backlight module. 19. The projection device of claim 12, further comprising: An adhesive tape is pasted on the side of the circuit board facing away from the shell and covers the backlight module. 20. The projection device as claimed in claim 12, wherein the position of the button image corresponds to the touch sensing circuit. 21. The projection device as claimed in claim 12, wherein the button image is a laser engraved image. 22. The projection device as claimed in claim 12, wherein the button image is formed by a light-transmitting area.

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