CN216490446U

CN216490446U - Touch panel shell, PCB mounting box and touch switch assembly

Info

Publication number: CN216490446U
Application number: CN202123368453.4U
Authority: CN
Inventors: 彭波; 顾聪翀; 赵小林; 王雅琪
Original assignee: Wuxi Hejing Intelligent Technology Co ltd
Current assignee: Wuxi Hejing Intelligent Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-10
Anticipated expiration: 2031-12-29

Abstract

The utility model relates to a touch panel shell, PCB mounting box and touch switch subassembly. The touch switch assembly comprises a touch panel shell and a PCB mounting box; the inserting end is inserted into the accommodating cavity, and the first fixing piece and the second fixing piece are matched and fixed; the PCB is arranged in the PCB placing cavity, and the second end of the light guide column is in contact with the light-emitting position of the LED on the first surface of the PCB; the contact on the turned edge is contacted with the touch pad induction area on the second surface of the PCB board; the touch panel is fixed on the outer side surface of the panel fixing surface; the fixed base is contacted with the touch pad induction area of the touch panel. The utility model has the advantages of sensitive triggering, firm and reliable installation and long service life; the function of the touch switch when the touch sensing area and the LED display are positioned on the opposite side of the PCB can be realized.

Description

Touch panel shell, PCB mounting box and touch switch assembly

Technical Field

The utility model relates to a switch module, concretely relates to touch panel shell, PCB mounting box and touch switch subassembly.

Background

In the existing touch switch technology, a common switch layout and assembly method is to assemble a touch panel and a PCB circuit board in parallel, a space between a structural component and the circuit board is relatively abundant, and a common touch structure includes a spring, a metal elastic sheet, conductive plastic or conductive sponge, and the like. In the prior art, such assembly methods sometimes do not accommodate all installation situations. For example, in the case of parallel mounting, the touch sensing area of the PCB and the LED must be designed on the same side of the PCB, otherwise it is difficult to achieve the touch function and use the LED to illuminate the touch area, which limits the layout of the circuit structure of the PCB. As another example, in some cases, the width of the touch panel housing assembly is very narrow, but the area of the PCB circuit board may be large, and if a parallel mounting method is also used, the space of the PCB circuit board is very narrow, and layout is difficult. If the parallel layout method is not used, the following problems may be faced:

1. if the PCB circuit board and the touch panel are not in a parallel installation relationship, how to ensure the simple and stable assembly of the PCB circuit board;

2. if the touch sensing area of the PCB and the LED are designed on different side surfaces of the PCB, what touch mode should be selected to ensure the touch effect;

3. when the width of the touch panel shell component is narrow, how to arrange the installation modes of the PCB and the touch panel comprehensively can ensure the touch effect of the touch panel and the display effect of the touch panel.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model discloses a touch panel shell, PCB mounting box and touch switch subassembly.

The utility model discloses the technical scheme who adopts as follows:

a touch panel case comprises a panel fixing surface and an accommodating cavity; the panel fixing surface is provided with a light transmission groove and a contact position; a light guide column and an elastic sheet are fixed in the accommodating cavity; the first end of the light guide column is contacted with the light transmission groove; the base of the elastic sheet is fixed at the position of the contact position; and a mounting position of the PCB is arranged between the second end of the light guide column and the curled edge of the elastic sheet.

The fixing base is connected with the turned edge through a supporting sheet; at least one contact is disposed on the bead.

According to a further technical scheme, at least one part of the supporting sheet is attached to a first inner side face of the accommodating cavity.

The light guide column comprises a fixed edge and at least one tooth-shaped structure; the tooth-shaped structure comprises a first light guide section and a second light guide section which is integrally connected with the first light guide section at a set angle; the first light guide section is connected with the fixed edge; the fixing edge is fixed on the inner side of the panel fixing surface and contacts the light-transmitting groove; and a mounting position of the PCB is arranged between the end head of the second light guide section and the curled edge of the elastic sheet.

The further technical scheme is that the base of the elastic sheet is fixed below the second light guide section of the light guide column.

The further technical scheme is that a first fixing piece is arranged on the inner side face of the accommodating cavity.

A PCB mounting box comprises a plug-in end and a PCB placing cavity; the back plate of the plug-in end is integrally connected with the back plate of the PCB placing cavity; two side surfaces of the insertion end are provided with second fixing pieces; the insertion surface of the insertion end is of an unsealed structure.

The technical scheme is that at least one partition plate which is parallel to the back plate of the inserting end and is uniformly spaced is fixed on the back plate of the inserting end.

The further technical scheme is that a PCB fixing structure is arranged on the back plate of the PCB placing cavity.

A touch switch assembly comprising a touch panel housing as claimed in any preceding claim and a PCB mounting box as claimed in any preceding claim; the inserting end is inserted into the accommodating cavity, and the first fixing piece and the second fixing piece are matched and fixed; the PCB is arranged in the PCB placing cavity, and the second end of the light guide column is in contact with the light-emitting position of the LED on the first surface of the PCB; the contact on the turned edge is contacted with the touch pad induction area on the second surface of the PCB; the touch panel is fixed on the outer side surface of the panel fixing surface; the fixed base is contacted with the touch pad induction area of the touch panel.

The utility model has the advantages as follows: .

1. The utility model discloses a design PCB mounting box and touch panel shell's structure for the PCB circuit board can be mutually perpendicular's installation relation with touch panel, and can guarantee the installation of PCB circuit board location accuracy, fixed stability at the in-process of installation.

2. The utility model provides a PCB circuit board's touch-control induction zone and LED design are in the different side of PCB circuit board, and wherein the touch-control induction zone of PCB board contacts through shell fragment and touch panel's touch-control induction zone, has guaranteed touch-control function's realization, and the light that the LED of PCB board sent shines touch panel through leaded light post and light trap, guarantees touch panel's display effect.

3. The utility model discloses a structure of leaded light post and shell fragment has been designed for the base of shell fragment is fixed in the second leaded light section below of leaded light post. When the width of the touch panel shell component is narrow, the elastic sheet and the light guide column do not occupy more space but do not influence the realization of functions, so that the touch effect of the touch panel can be ensured, and the display effect of the touch panel can be ensured.

In conclusion, the utility model has the advantages of sensitive triggering, firm and reliable installation and long service life; the function of the touch switch when the touch sensing area and the LED display are opposite to each other on the PCB can be realized, the problem of difficult assembly caused by narrow space is solved through reasonable space multiplexing, and the display and touch control design difficulty caused by vertical assembly of the PCB and the touch display panel is solved.

Drawings

Fig. 1 is a schematic diagram of a touch panel housing in an embodiment of the invention.

Fig. 2 is a schematic view in another direction of fig. 1.

Fig. 3 is a schematic view of a light guide pillar in an embodiment of the present invention.

Fig. 4 is a schematic view of another direction of fig. 3.

Fig. 5 is a schematic diagram of the elastic sheet according to the embodiment of the present invention.

Fig. 6 is a schematic view of another angle of fig. 5.

Fig. 7 is a schematic diagram of the light guide pillar and the elastic sheet installed in the touch panel casing according to the embodiment of the present invention.

Fig. 8 is a schematic view of another angle of fig. 7.

Fig. 9 is an enlarged schematic view of structure a in fig. 8.

Fig. 10 is a schematic diagram of a PCB mounting box in an embodiment of the invention.

Fig. 11 is a schematic view of another angle of fig. 10.

In the figure: 1. a PCB mounting box; 101. a plug end; 102. a PCB placing cavity; 103. a partition plate; 104. a second fixing member; 105. mounting holes; 106. a support point; 107. a position clamping column; 108. a positioning structure; 2. a touch panel housing; 201. a panel fixing surface; 202. an accommodating chamber; 203. a light-transmitting groove; 204. a contact position; 205. a first fixing member; 206. a first latch member; 207. positioning the edge; 3. a light guide pillar; 301. fixing the edge; 302. a first light guide section; 303. a second light guide section; 304. a second latch member; 4. a spring plate; 401. a base; 402. curling; 403. a support sheet; 404. and (4) a contact.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

Fig. 1 is a schematic diagram of a touch panel housing in an embodiment of the invention. Fig. 2 is a schematic view in another direction of fig. 1. As shown in fig. 1 and 2, the touch panel case 2 includes a panel fixing surface 201 and a receiving cavity 202. The panel fixing surface 201 is provided with a light transmission groove 203 and a contact position 204. In the present embodiment, the light transmission groove 203 is a long strip parallel to the long side of the touch panel case 2. First fixing members 205 are provided on both side surfaces of the touch panel case 2. The first fixing member 205 is used to fix the PCB mounting case 1. The outer side of the panel fixing surface 201 is used for mounting a touch panel. There are a plurality of contact sites 204 corresponding to the touch pad sensing sites of the touch panel. A positioning edge 207 is provided next to the contact site 204 for facilitating positioning of the contact site 204.

Fig. 3 is a schematic view of a light guide pillar in an embodiment of the present invention. Fig. 4 is a schematic view of another direction of fig. 3. As shown in fig. 3 and 4, the light guide bar 3 includes a fixing edge 301 and at least one tooth-like structure fixed on the fixing edge 301. In this embodiment, there are nine tooth structures arranged in a row. The tooth-shaped structure comprises a first light guide section 302 and a second light guide section 303 integrally connected with the first light guide section 302 at a set angle. The first light guiding section 302 is integrally connected to the fixing edge 301. In the present embodiment, the first light guiding section 302 and the second light guiding section 303 are perpendicular to each other, and the set angle is 90 °, so that the light emitted from the LEDs is guided from the PCB to the touch panel mounted perpendicular to the PCB. If the installation structure with other angles exists, the set angle can be adjusted adaptively. The fixing edge 301 of the light guide pillar 3 is further provided with a second latch member 304 for fixing the light guide pillar 3 in the accommodating cavity 202.

Fig. 5 is a schematic diagram of the elastic sheet according to the embodiment of the present invention. Fig. 6 is a schematic view of another angle of fig. 5. As shown in fig. 5 and 6, the elastic sheet 4 includes a base 401, a curled edge 402, and a supporting sheet 403 connecting the base 401 and the curled edge 402. Preferably, the support tabs 403 are curved, and at least a portion of the support tabs 403 are in a perpendicular relationship to the base 401. The support tab 403 adjusts the position of the end of the bead 402 to be located generally above the base 401. At least one contact 404 is provided at the end of the bead 402, and in this embodiment, two contacts 404 are provided, so that the contacts 404 have a redundant backup, and when one of the contacts 404 is damaged, the other contact 404 can ensure that the dome 4 is touch-active.

Fig. 7 is a schematic diagram of the light guide pillar and the elastic sheet installed in the touch panel casing according to the embodiment of the present invention. Fig. 8 is a schematic view of another angle of fig. 7. As shown in fig. 7 and 8, the fixing edge 301 is fixed to the inner side of the panel fixing surface 201 and covers the light-transmitting groove 203 in contact therewith. Fig. 9 is an enlarged schematic view of structure a in fig. 8. Referring to fig. 9, a first latch member 206 is provided at an inner side of the panel fixing face 201. The first latch member 206 extends into the hole of the second latch member 304 and locks the locking structure of the second latch member 304, so as to fix the light guide post 3 inside the touch panel housing 2. The inner side of the touch panel housing 2 is further provided with a contact position 204, and after the light guide column 3 is fixed, the contact position 204 is located below the position of the second light guide section 303 of the tooth-shaped structure of the light guide column 3. There are a plurality of contact sites 204, and after the touch panel is installed, the position of the contact site 204 corresponds to the position of the touch pad sensing region of the touch panel. A raised positioning edge 207 is provided at the edge of the contact position 204 for facilitating positioning and mounting of the spring plate 4.

When the elastic sheet 4 is installed, the base 401 is positioned inside the positioning edge 207 through the installation ribs on the two sides of the base 401, and contacts with the contact position 204. The four positioning posts penetrate through the fixing holes on the base 401 and are thermally fused, so that the elastic sheet 4 is firmly fixed in the accommodating cavity 202.

Preferably, after the elastic sheet 4 is fixed, at least a part of the support sheet 403 perpendicular to the base 401 is closely attached to the first inner side surface of the accommodating cavity 202. The first inner side surface of the accommodating cavity 202 is used for supporting to prevent contact failure of the elastic sheet 4, and the first inner side surface of the accommodating cavity 202 can be used for dispersing pressure when the elastic sheet is pressed, so that the service life of the elastic sheet 4 is prolonged.

Preferably, the base 401 of the elastic piece 4 is fixed below the second light guide section 303 of the light guide column 3. Therefore, the assembly positions of the elastic sheet 4 and the light guide column 3 are ingeniously recycled, and the problems that the width of the touch panel shell 2 is limited and the space of the accommodating cavity 202 is limited are solved.

As shown in fig. 7, a mounting position of the PCB is located between the end of the second light guiding section 303 and the curled edge 402 of the elastic sheet 4. When the PCB is mounted between the end of the second light guiding section 303 and the curled edge 402 of the elastic sheet 4, the end of the second light guiding section 303 contacts with the light emitting position of the LED on the first side of the PCB. The bead 402 is in contact with a touch pad sensing area of the second side of the PCB board.

Fig. 10 is a schematic diagram of a PCB mounting box in an embodiment of the invention. Fig. 11 is a schematic view of another angle of fig. 10. As shown in fig. 10 and 11, the PCB mounting box 1 includes a socket terminal 101 and a PCB board placing cavity 102. The back plate of the plug terminal 101 is integrally connected with the back plate of the PCB board placing cavity 102. The two sides of the inserting end 101 are provided with second fixing pieces 104. The plugging surface of the plugging end 101 is an unsealed structure so that the PCB board can be installed into the installation position between the light guide column 3 and the elastic sheet 4. At least one partition plate 103 with uniform intervals is fixed on the back plate of the plug end 101 and is parallel to the back plate of the plug end 101. In the present embodiment, seven partitions 103 are provided to match the tooth-like structure of the light guide bar 3.

A PCB fixing structure is disposed on the back plate of the PCB placement chamber 102. Specifically, the PCB fixing structure comprises a positioning structure 108 located in the middle of the PCB placing cavity 102, a plurality of supporting points 106 and a plurality of clamping columns 107 arranged on the side of the PCB placing cavity 102, a positioning hole is formed in the middle of the PCB, the positioning structure 108 is inserted into the positioning hole, the supporting points 106 support the PCB to a certain position so that the PCB is not attached to a back plate of the PCB placing cavity 102, and the PCB is convenient to insert into an installation position between the light guide column 3 and the elastic sheet 4. The plurality of retention posts 107 retain the edges of the PCB board.

The PCB mounting box 1 and the touch panel shell 2 are assembled and mounted to form a touch switch assembly. Referring to fig. 10, 11, 7 and 8, when the plug end 101 is inserted into the receiving cavity 202 from the plug surface side, the first fixing member 205 and the second fixing member 104 are fixed in a matching manner. In this embodiment, the first fixing element 205 and the second fixing element 104 are snap structures that can be engaged with each other, and other structures having fixing functions can also be used. The PCB is mounted in the PCB placing cavity 102, and the PCB is inserted between the end of the second light guiding section 303 and the curled edge 402 of the elastic sheet 4, so that the end of the second light guiding section 303 contacts with the light emitting position of the LED on the first side of the PCB. The bead 402 is in contact with a touch pad sensing area of the second side of the PCB board. The partition 103 of the plug end 101 is inserted between two adjacent tooth-like structures of the light guide bar 3. The edge of the back plate of the inserting end 101 is further provided with a mounting hole 105 for leaving a position for the supporting piece 403 of the elastic sheet 4 tightly attached to the first inner side surface of the accommodating cavity 202.

In the touch switch assembly, because the PCB circuit board and the touch panel housing 2 are in a relatively vertical assembly state, the direction of the LED light is parallel to the touch panel, and the display effect of the touch panel is poor in such a parallel state; the structure of the first light guide section 302 and the second light guide section 303 in the light guide column 3 enables the light of the LED to pass through a series of refractions in the light guide column 3, and vertically emit to the light transmission groove 203, so that the touch panel achieves the best display effect. Similarly, in the touch switch assembly, the elastic sheet 4 is formed by a series of bending and arc structures, so that signals in the touch pad sensing area of the touch panel can be transmitted to the PCB circuit board. Therefore, the optimal display effect of the touch panel is ensured under the condition of ensuring the touch function of the touch panel.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.

Claims

1. A touch panel cover, characterized in that the touch panel cover (2) comprises a panel fixing surface (201) and a receiving cavity (202); a light-transmitting groove (203) and a contact position (204) are formed in the panel fixing surface (201); a light guide column (3) and an elastic sheet (4) are fixed in the accommodating cavity (202); the first end of the light guide column (3) is contacted with the light transmission groove (203); the base (401) of the elastic sheet (4) is fixed at the position of the contact position (204); and a mounting position of the PCB is arranged between the second end of the light guide column (3) and the curled edge (402) of the elastic sheet (4).

2. The touch panel cover according to claim 1, wherein the base (401) and the rolled edge (402) are connected by a support sheet (403); at least one contact (404) is arranged on the crimp (402).

3. The touch panel cover according to claim 2, wherein at least a portion of the support sheet (403) abuts against a first inner side of the receiving cavity (202).

4. The touch panel cover according to claim 1, wherein the light guide (3) comprises a fixed edge (301) and at least one tooth-like structure; the tooth-shaped structure comprises a first light guide section (302) and a second light guide section (303) integrally connected with the first light guide section (302) at a set angle; the first light guide section (302) is connected with the fixed edge (301); the fixing edge (301) is fixed on the inner side of the panel fixing surface (201) and contacts with the light transmission groove (203); and a mounting position of the PCB is arranged between the end head of the second light guide section (303) and the curled edge (402) of the elastic sheet (4).

5. The touch panel cover according to claim 1, wherein the base (401) of the dome (4) is fixed below the second light guide section (303) of the light guide column (3).

6. The touch panel cover according to claim 1, wherein the side of the receiving cavity (202) is provided with a first fixture (205).

7. A PCB mounting box which is characterized in that: the PCB mounting box (1) comprises a plug-in end (101) and a PCB placing cavity (102); the back plate of the plug-in end (101) is integrally connected with the back plate of the PCB placing cavity (102); two side surfaces of the insertion end (101) are provided with second fixing pieces (104); the insertion surface of the insertion end (101) is of an unsealed structure.

8. The PCB mounting box of claim 7, wherein: at least one partition plate (103) which is arranged in parallel with the back plate of the insertion end (101) and is uniformly spaced is fixed on the back plate of the insertion end (101).

9. The PCB mounting box of claim 7, wherein: and a PCB fixing structure is arranged on the back plate of the PCB placing cavity (102).

10. A touch switch assembly comprising the touch panel case of any one of claims 1 to 6 and the PCB mounting box of any one of claims 7 to 9; the insertion end (101) is inserted into the accommodating cavity (202), and the first fixing piece (205) and the second fixing piece (104) are matched and fixed; the PCB is arranged in the PCB placing cavity (102), and the second end of the light guide column (3) is in contact with the light-emitting position of the LED on the first surface of the PCB; contacts (404) on the curl (402) contact a touch pad sensing area of the second side of the PCB board; the touch panel is fixed on the outer side surface of the panel fixing surface (201); the base (401) is in contact with a touch pad sensing area of the touch panel.