阅读说明：本技术 一种自动化焊接用的手操器 (Manual operator for automatic welding ) 是由 李小强 于 2019-10-12 设计创作，主要内容包括：本发明提供一种自动化焊接用的手操器,涉及自动化控制技术领域,包括壳体、控制电路板和窗口板,壳体为顶部开口的矩形盒体状结构,且窗口板和控制电路板自上而下依次设置在壳体的顶部开口内,壳体的左右内壁上分别设置有左支撑板和右支撑板,且左支撑板和右支撑板的底面均设置在壳体内的底面上,左支撑板和右支撑板的顶面上均设置有若干螺钉固定座槽,螺钉固定座槽内均活动设置有螺钉固定座,壳体的前端侧壁上还设置有若干侧面控制键孔。本发明具有可提高对控制电路板和窗口板固定的稳固性,可避免因在壳体上进行攻丝加工的螺纹孔不合格而导致的壳体报废,也具有控制电路板与按键和旋钮之间可靠连接等优点。(The invention provides a manual operator for automatic welding, which relates to the technical field of automatic control and comprises a shell, a control circuit board and a window board, wherein the shell is of a rectangular box-shaped structure with an opening at the top, the window board and the control circuit board are sequentially arranged in the opening at the top of the shell from top to bottom, a left support plate and a right support plate are respectively arranged on the left inner wall and the right inner wall of the shell, the bottom surfaces of the left support plate and the right support plate are respectively arranged on the bottom surface in the shell, a plurality of screw fixing seat grooves are respectively arranged on the top surfaces of the left support plate and the right support plate, screw fixing seats are respectively and movably arranged in the screw fixing seat grooves, and a plurality of side control key holes are also arranged on the. The invention has the advantages of improving the stability of fixing the control circuit board and the window plate, avoiding the scrapping of the shell caused by disqualified threaded holes for tapping on the shell, and having reliable connection among the control circuit board, the keys and the knobs, and the like.)

1. The utility model provides an automatic change manual operator of welding usefulness which characterized in that: comprises a shell (1), a control circuit board (2) and a window board (3), wherein the shell (1) is a rectangular box-shaped structure with an opening at the top, the window board (3) and the control circuit board (2) are sequentially arranged in the opening at the top of the shell (1) from top to bottom, a left support plate (11) and a right support plate (12) are respectively arranged on the left inner wall and the right inner wall of the shell (1), the bottom surfaces of the left support plate (11) and the right support plate (12) are respectively arranged on the bottom surface in the shell (1), a plurality of screw fixing seat grooves (13) are respectively arranged on the top surfaces of the left support plate (11) and the right support plate (12), screw fixing seats (14) are respectively and movably arranged in the screw fixing seat grooves (13), a plurality of side control key holes (15) are also arranged on the side wall at the front end of the shell (1), the control circuit board (2) is of a rectangular structure, the bottom surfaces at the left end and the right end of the control circuit board, the side walls of the left end and the right end of the control circuit board (2) are respectively provided with a plurality of semicircular grooves (22), the positions of the semicircular grooves (22) correspond to the positions of the screw fixing seats (14), the top surface of the control circuit board (2) is also provided with a plurality of single-head studs (23), one ends of the single-head studs (23) are arranged on the top surface of the control circuit board (2), the window plate (3) is in a rectangular structure, the top surfaces of the front end and the rear end of the window plate (3) are respectively provided with a plurality of handles (31), a plurality of button holes (32), a plurality of knob holes (39) and rectangular display screen holes (38) are arranged between the handles (31), the left end and the right end of the window plate (3) are respectively provided with a plurality of first counter bores (34), the positions of the first counter bores (34) correspond to the positions of the screw fixing seats (14), screws (35) are arranged in the first counter bores (34), and the screws (35) penetrate through the first counter, a plurality of second counter bores (36) are further arranged on the top surface of the window plate (3), the other ends of the single-end studs (23) correspond to the positions of the second counter bores (36), fastening screws (37) are further arranged in the second counter bores (36), and the fastening screws (37) penetrate through the second counter bores (36) to the other ends of the single-end studs (23).

2. The hand operator for automated welding according to claim 1, characterized in that: the bottom of screw fixing seat (14) is located screw fixing seat groove (13), the top of screw fixing seat (14) is located the outside of screw fixing seat groove (13), and semi-circular groove (22) are passed at the top of screw fixing seat (14), the top of screw fixing seat (14) still is provided with screw hole (16), and screw (35) pass first counter bore (34) to screw hole (16) in, be provided with on the lateral wall of screw fixing seat (14) card foot (17), card foot (17) are the structure of falling triangle-shaped form, still all be provided with card foot groove (18) on the outer wall of screw fixing seat groove (13), and card foot groove (18) are linked together with screw fixing seat groove (13), card foot (17) are located card foot groove (18).

3. The hand operator for automated welding according to claim 1, characterized in that: the top surface of the control circuit board (2) is further provided with a plurality of through holes (232), one end of the single-end stud (23) is of an external threaded rod structure with a nut, one end of the single-end stud (23) penetrates through the through holes (232), the other end of the single-end stud (23) is provided with an internal threaded hole (231), and the fastening screw (37) penetrates through the second counter bore (36) to the internal threaded hole (231).

4. The hand operator for automated welding according to claim 1, characterized in that: the cross sections of the screw fixing seat groove (13) and the screw fixing seat (14) are both semicircular, and the screw fixing seat groove (13) is distributed equidistantly along the length direction of the left support plate (11) and the right support plate (12) respectively.

5. The hand operator for automated welding according to claim 2, characterized in that: the side wall of the screw fixing seat (14) is further provided with an arc-shaped plate (141), arc-shaped openings of the arc-shaped plate (141) are fixedly arranged on the side wall of the screw fixing seat (14), and the clamping pins (17) are fixedly arranged on the arc-shaped surface of the arc-shaped plate (141).

6. The hand operator for automated welding according to claim 1, characterized in that: the support rod (4) is further arranged in the shell (1), the support rod (4) is of a rectangular frame-shaped structure, two ends of the support rod (4) are respectively arranged on the top surfaces of the left support plate (11) and the right support plate (12), and the top surface of the support rod (4), the top surface of the left support plate (11) and the top surface of the right support plate (12) are on the same plane.

7. The hand operator for automated welding according to claim 1, characterized in that: sealing covers (151) are movably arranged in the side control key holes (15), the shapes of the sealing covers (151) are the same as those of the side control key holes (15), the number of the sealing covers (151) is the same as that of the side control key holes (15), and the sealing covers (151) and the side control key holes (15) are in interference fit.

8. The hand operator for automated welding according to claim 1, characterized in that: the top surface of the control circuit board (2) is also fixedly provided with a frame-shaped sealing strip (21), the bottom surface of the window plate (3) is also provided with a sealing strip groove (33), the shape of the sealing strip groove (33) is the same as that of the frame-shaped sealing strip (21), and the position of the sealing strip groove (33) corresponds to that of the frame-shaped sealing strip (21).

Technical Field

The invention relates to the technical field of automatic control, in particular to a manual operator for automatic welding.

Background

In industrial automation application, an operator uses a manual operator to complete functions of remote communication, parameter input and output, state display and the like, and an automatic system is controlled to operate.

In the existing manual operator scheme, a key and a knob are installed together with a window plate, a control circuit board is installed on a bottom plate in a box shell, plugs of the key and the knob are connected with the control circuit board through a patch cord, and the window plate is fixedly installed on the shell. In order to install and fix the window plate, a threaded hole needs to be tapped on the shell, if the tapping on the shell is unqualified, the screw is easy to slip when being screwed down, and the whole shell needs to be replaced when the screw is serious, so that the cost is increased; when the mode is used, the stability of the control circuit board arranged on the bottom plate in the box shell is poor, meanwhile, the control circuit board is connected with the keys and the knob through the patch cord, the connection is complicated, faults such as connection errors and loose joints are easy to occur, and the reliability is low.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the manual operator for automatic welding, which can improve the stability of fixing the control circuit board and the window plate, avoid the rejection of the shell due to the unqualified threaded hole for tapping on the shell, and also has reliable connection among the control circuit board, the key and the knob.

In order to solve the technical problems, the invention provides a manual operator for automatic welding, which comprises a shell, a control circuit board and a window board, wherein the shell is of a rectangular box-shaped structure with an opening at the top, the window board and the control circuit board are sequentially arranged in the opening at the top of the shell from top to bottom, a left support plate and a right support plate are respectively arranged on the left inner wall and the right inner wall of the shell, the bottom surfaces of the left support plate and the right support plate are respectively arranged on the bottom surface in the shell, a plurality of screw fixing seat grooves are respectively arranged on the top surfaces of the left support plate and the right support plate, screw fixing seats are respectively and movably arranged in the screw fixing seat grooves, a plurality of side control key holes are also arranged on the side wall at the front end of the shell, the control circuit board is of a rectangular structure, the bottom surfaces at the left end and the right end of the control circuit board are respectively contacted, the semicircular groove corresponds to the screw fixing seat, a plurality of single-end studs are further arranged on the top surface of the control circuit board, one end of each single-end stud is arranged on the top surface of the control circuit board, the window plate is of a rectangular structure, handles are arranged on the top surfaces of the front end and the rear end of the window plate, a key hole, a plurality of knob holes and a rectangular display screen hole are arranged between the handles, a plurality of first counter bores are arranged at the left end and the right end of the window plate, the position of the first counter bore corresponds to the position of the screw fixing seat, screws are arranged in the first counter bore, and the screw passes through the first counter bore to the screw fixing seat, a plurality of second counter bores are further arranged on the top surface of the window plate, the other ends of the single-end studs correspond to the positions of the second counter bores, fastening screws are further arranged in the second counter bores, and the fastening screws all pass through the second counter bores to the other ends of the single-end studs.

Preferably, the bottom of the screw fixing seat is located in the screw fixing seat groove, the top of the screw fixing seat is located outside the screw fixing seat groove, the top of the screw fixing seat penetrates through the semicircular groove, the top of the screw fixing seat is further provided with a screw hole, a screw penetrates through the first counter bore to the screw hole, clamping feet are arranged on the side wall of the screw fixing seat and are of an inverted triangular structure, clamping foot grooves are formed in the outer wall of the screw fixing seat groove and are communicated with the screw fixing seat groove, the clamping feet are located in the clamping foot grooves, and after the screw fixing seat is inserted into the screw fixing seat groove, the screw fixing seat can be clamped into the clamping foot grooves through the clamping feet to be fixed; when the clamping pin is pressed down, the screw fixing seat can be taken out from the screw fixing seat groove for replacement; the screw passes through the first counter bore to be convenient for fix the window board on the casing in the screw hole.

Preferably, a plurality of through holes are further formed in the top surface of the control circuit board, one end of the single-end stud is of an external threaded rod structure with a nut, one end of the single-end stud penetrates through the through holes, the other end of the single-end stud is provided with an internal threaded hole, a fastening screw penetrates through the second counter bore and reaches the internal threaded hole, one end of the single-end stud penetrates through the through holes in the control circuit board, then the nut on one end of the single-end stud is screwed, and accordingly the single-end stud is fixedly connected with the control circuit board.

Preferably, the cross section of screw fixing seat groove and screw fixing seat is semicircle shape, and the screw fixing seat groove distributes along the length direction equidistance of left branch fagging and right branch fagging respectively for fix back on the casing with window board and control circuit board, be convenient for when operating button, side control key and the knob on the control circuit board, be favorable to keeping control circuit board's stability.

Preferably, still be provided with the arc on screw fixing base's the lateral wall, the arc opening of arc is all fixed to be set up on screw fixing base's lateral wall, and the card foot is fixed to be set up on the arcwall face of arc, when needs are changed screw fixing base, can press card foot extrusion arc and warp for the card foot is followed card foot inslot extrusion, can take out screw fixing base from the screw fixing base inslot and change.

Preferably, still be provided with a plurality of bracing pieces in the casing, the bracing piece is rectangular frame column structure, and the both ends of bracing piece set up respectively on the top surface of left branch fagging and right branch fagging, and the top surface of bracing piece, the top surface of left branch fagging and right branch fagging are on same plane, and when fixing window board and control circuit board back on the casing, the bracing piece can play the supporting role to control circuit board's bottom, when operating button, side control key and the knob on the control circuit board, is favorable to keeping control circuit board's stability.

Preferably, the side control key holes are internally and movably provided with sealing covers, the shapes of the sealing covers are the same as those of the side control key holes, the number of the sealing covers is the same as that of the side control key holes, the sealing covers and the side control key holes are in interference fit, the sealing covers can seal the side control key holes which are not required to be used, and dust is reduced from entering the shell.

Preferably, still fixed frame form sealing strip that is provided with on control circuit board's the top surface, still be provided with the sealing strip groove on the bottom surface of window board, the shape in sealing strip groove is the same with the shape of frame form sealing strip, and the position in sealing strip groove is corresponding with the position of frame form sealing strip, when will be connected fixedly between window board and the control circuit board through the single-end double-screw bolt, frame form sealing strip can block into the sealing strip inslot, can play the clearance seal effect to between control circuit board and the window board, be favorable to reducing the entering of dust between control circuit board and the window board.

The invention has the beneficial effects that:

(1) the window plate and the control circuit board are connected through the single-end stud, and then the window plate and the control circuit board are fixed in the shell through the screws, so that the stability of fixing the window plate and the control circuit board is improved, the window plate and the control circuit board are convenient to disassemble and maintain, the development, debugging and maintenance efficiency is improved, and the defects that the control circuit board is inconvenient and unreliable to connect with the keys and the knobs in a patch cord connection mode are avoided;

(2) the window plate and the control circuit board are fixed on the screw fixing seat through screws, so that when the threaded hole is unqualified due to tapping on the shell, the screw fixing seat can be directly replaced without scrapping the whole shell, and cost waste and replacement time are reduced;

(3) the matching of the frame-shaped sealing strip and the sealing strip groove can play a role in sealing the gap between the control circuit board and the window plate, and is favorable for reducing the entering of dust between the control circuit board and the window plate.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is an exploded view of a hand-held manipulator for automated welding according to the present invention;

FIG. 2 is a schematic diagram of a sealing strip groove position of a manual operator for automatic welding according to the present invention;

FIG. 3 is a schematic structural view of the window plate and the control circuit board of the manual operator for automatic welding according to the present invention;

FIG. 4 is a schematic diagram of a screw retaining seat slot position of a manual operator for automatic welding according to the present invention;

FIG. 5 is a schematic diagram of a single-ended stud structure of a manual manipulator for automated welding according to the present invention;

FIG. 6 is a schematic diagram of the position of an arc-shaped plate of the manual manipulator for automatic welding according to the present invention;

FIG. 7 is a schematic diagram illustrating a position of a control circuit board of a manual operator for automated welding according to the present invention when the control circuit board is installed in a housing;

FIG. 8 is a schematic view of the position of a through hole of a hand operator for automated welding according to the present invention;

FIG. 9 is a schematic structural view of a manual operator for automated welding according to the present invention;

the reference signs are: 1. a housing; 11. a left support plate; 12. a right support plate; 13. a screw fixing seat groove; 14. a screw fixing seat; 141. an arc-shaped plate; 15. a side control key hole; 151. a sealing cover; 152. a side control key; 16. screw holes; 17. clamping a pin; 18. a clamping foot groove; 2. a control circuit board; 21. a frame-like sealing strip; 22. a semicircular groove; 23. a single-ended stud; 231. an internally threaded bore; 232. a through hole; 3. a window plate; 31. a handle; 32. a key hole; 321. pressing a key; 322. a rectangular display screen; 323. a knob; 33. sealing the strip groove; 34. a first counterbore; 35. a screw; 36. a second counterbore; 37. fastening screws; 38. a rectangular display screen hole; 39. a knob hole; 4. a support rod.

Detailed Description

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

As shown in fig. 1-9, the manual operator for automatic welding of this embodiment includes a housing 1, a control circuit board 2 and a window board 3, the housing 1 is a rectangular box-shaped structure with an open top, the window board 3 and the control circuit board 2 are sequentially disposed in the open top of the housing 1 from top to bottom, a left support board 11 and a right support board 12 are respectively disposed on the left and right inner walls of the housing 1, the bottom surfaces of the left support board 11 and the right support board 12 are both disposed on the bottom surface of the housing 1, a plurality of screw fixing seat slots 13 are respectively disposed on the top surfaces of the left support board 11 and the right support board 12, screw fixing seats 14 are respectively movably disposed in the screw fixing seat slots 13, a plurality of side control key holes 15 are further disposed on the front end side wall of the housing 1, the control circuit board 2 is a rectangular structure, the bottom surfaces of the left and right ends of the control circuit board 2 are respectively contacted with the top surfaces, the side walls of the left end and the right end of the control circuit board 2 are provided with a plurality of semicircular grooves 22, the positions of the semicircular grooves 22 correspond to the positions of the screw fixing seats 14, the top surface of the control circuit board 2 is provided with a plurality of single-head studs 23, one ends of the single-head studs 23 are arranged on the top surface of the control circuit board 2, the window plate 3 is in a rectangular structure, the top surfaces of the front end and the rear end of the window plate 3 are provided with handles 31, a key hole 32, a plurality of knob holes 39 and a rectangular display screen hole 38 are arranged between the handles 31, the left end and the right end of the window plate 3 are provided with a plurality of first counter bores 34, the positions of the first counter bores 34 correspond to the positions of the screw fixing seats 14, screws 35 are arranged in the first counter bores 34, the screws 35 penetrate through the first counter bores 34 to the screw fixing seats 14, the top surface of the window plate 3 is provided with a plurality of second counter bores 36, fastening screws 37 are arranged in the second counter bores 36, and the fastening screws 37 penetrate through the second counter bores 36 to the other end of the single-head stud 23.

The bottom of the screw fixing seat 14 is located in the screw fixing seat groove 13, the top of the screw fixing seat 14 is located outside the screw fixing seat groove 13, the top of the screw fixing seat 14 penetrates through the semicircular groove 22, the top of the screw fixing seat 14 is also provided with a screw hole 16, a screw 35 penetrates through the first counter bore 34 to the screw hole 16, a clamping foot 17 is arranged on the side wall of the screw fixing seat 14, the clamping foot 17 is of an inverted triangular structure, clamping foot grooves 18 are also formed in the outer wall of the screw fixing seat groove 13, the clamping foot grooves 18 are communicated with the screw fixing seat groove 13, the clamping foot 17 is located in the clamping foot groove 18, and after the screw fixing seat 14 is inserted into the screw fixing seat groove 13, the screw fixing seat can be clamped into the clamping foot grooves 18 through the clamping foot 17 for fixing; when the clamping foot 17 is pressed down, the screw fixing seat 14 can be taken out from the screw fixing seat groove 13 for replacement; the screws 35 penetrate through the first counter bores 34 to the screw holes 16 so as to fix the window plate 3 on the shell 1, the top surface of the control circuit board 2 is further provided with a plurality of through holes 232, one end of the single-end stud 23 is of an external threaded rod structure with nuts, one end of the single-end stud 23 penetrates through the through holes 232, the other end of the single-end stud 23 is provided with an internal threaded hole 231, the fastening screws 37 penetrate through the second counter bores 36 to the internal threaded hole 231, one end of the single-end stud 23 penetrates through the through holes 232 on the control circuit board 2 and then screws the nuts on one end of the single-end stud 23, namely, one end of the single-end stud 23 is fixedly connected with the control circuit board 2, the cross sections of the screw fixing seat grooves 13 and the screw fixing seats 14 are both in a semicircular shape, the screw fixing seat grooves 13 are respectively distributed along the length direction of the left support plate 11 and the right support plate, when the key 321, the side control key 152 and the knob 323 on the control circuit board 2 are operated, the stability of the control circuit board 2 is favorably maintained, the arc-shaped plate 141 is further arranged on the side wall of the screw fixing seat 14, the arc-shaped openings of the arc-shaped plate 141 are all fixedly arranged on the side wall of the screw fixing seat 14, the clamping feet 17 are fixedly arranged on the arc-shaped surface of the arc-shaped plate 141, when the screw fixing seat 14 needs to be replaced, the clamping feet 17 can be pressed to extrude the arc-shaped plate 141 to deform, so that the clamping feet 17 are extruded out of the clamping foot grooves 18, the screw fixing seat 14 can be taken out of the screw fixing seat grooves 13 to be replaced, the plurality of support rods 4 are further arranged in the shell 1, the support rods 4 are in a rectangular frame-shaped structure, two ends of the support rods 4 are respectively arranged on the top surfaces of the left support plate 11 and the right support plate 12, the top surfaces of the, after the window plate 3 and the control circuit board 2 are fixed on the casing 1, the support rod 4 can support the bottom of the control circuit board 2, so as to be convenient for operating the keys 321, the side control keys 152 and the knobs 323 on the control circuit board 2, so as to be beneficial for maintaining the stability of the control circuit board 2, sealing covers 151 are movably arranged in the side control key holes 15, the shapes of the sealing covers 151 are the same as the shapes of the side control key holes 15, the number of the sealing covers 151 is the same as the number of the side control key holes 15, the sealing covers 151 are in interference fit with the side control key holes 15, the sealing covers 151 can seal the side control key holes 15 which are not needed to be used, so as to reduce dust entering the casing 1, a frame-shaped sealing strip 21 is fixedly arranged on the top surface of the control circuit board 2, a sealing strip groove 33 is also arranged on the bottom surface of the window plate 3, and the shape of the sealing strip groove 33, and the position of the sealing strip groove 33 corresponds to the position of the frame-shaped sealing strip 21, when the window plate 3 and the control circuit board 2 are fixedly connected through the single-end stud 23, the frame-shaped sealing strip 21 can be clamped into the sealing strip groove 33, so that the gap sealing effect between the control circuit board 2 and the window plate 3 can be achieved, and the entering of dust between the control circuit board 2 and the window plate 3 is reduced.

The use principle of the invention is as follows: firstly, inserting the screw fixing seat 14 into the screw fixing seat groove 13, extruding the arc-shaped plate 141 to deform when the clamping pin 17 is contacted with the inner wall of the screw fixing seat groove 13 in the screw fixing seat groove 13, popping the clamping pin 17 into the clamping pin groove 18 under the action of the arc-shaped plate 141 when the clamping pin 17 passes through the clamping pin groove 18, wherein the top of the clamping pin 17 is contacted with the top of the clamping pin groove 18, fixing the screw fixing seat 14 in the screw fixing seat groove 13 because the clamping pin 17 is in an inverted triangle structure, screwing the nut on one end of the single-head stud 23 after one end of the single-head stud 23 passes through the through hole 232 on the control circuit board 2, namely fixedly connecting one end of the single-head stud 23 with the control circuit board 2, directly connecting the key 321, the rectangular display screen 322, the knob 323 and the side control key 152 on the control circuit board 2 in a welding mode, when the control circuit board 2 is placed in the shell 1, so that the top surfaces of the support rods 4 and the top surfaces of the left and right support plates 11 and 12 support the control circuit board 2, and the side control keys 152 on the control circuit board 2 are respectively inserted into the side control key holes 15 at the corresponding positions, the fastening screws 37 are inserted into the threaded holes 231 at the other end of the single-headed studs 23 through the second counter bores 36 on the window plate 3, the window plate 3 and the control circuit board 2 can be fixedly connected, at this time, the keys 321, the knobs 323 and the rectangular display screens 322 on the control circuit board 2 can be respectively positioned in the key holes 32, the knob holes 39 and the rectangular display screen holes 38 on the window plate 3, the window plate 3 and the control circuit board 2 which are connected together are placed into the shell 1 by the handheld handle 31, and then the screws 35 penetrate through the first counter bores 34 to the screw holes 16 at the top of the screw fixing seats 14, so that the window plate 3 and the control circuit board 2 which are connected together can be fixed in the shell 1; when the screw 35 is installed, the screw hole 16 is damaged, other undamaged screws 35 can be firstly dismounted, the window plate 3 and the control circuit board 2 which are connected together are taken out of the shell 1 by holding the handle 31 with hands, and then the clamping pin 17 is pressed to extrude the arc-shaped plate 141 to deform, so that the clamping pin 17 is pressed out of the clamping pin groove 18, and the screw fixing seat 14 can be taken out of the screw fixing seat groove 13 for replacement; the positions and the number of the side control key hole 15, the key hole 32, the knob hole 39 and the rectangular display screen hole 38 can be set according to the positions and the number of the side control key 152, the key 321, the knob 323 and the rectangular display screen 322 on the control circuit board 2, and sealing covers 151 matched with the key hole 32, the knob hole 39 and the rectangular display screen hole 38 in shape can be movably arranged in the key hole 32, the knob hole 39 and the rectangular display screen hole 38 respectively, so that the key hole 32, the knob hole 39 and the rectangular display screen hole 38 which are not needed to be used can be sealed independently; the number and the position of the single-ended studs 23 can be set along the peripheral direction of the control circuit board 2 according to actual operation requirements, and the through holes 232 on the control circuit board 2 and the second counter bores 36 on the top surface of the window plate 3 are cooperatively set according to the number and the position of the single-ended studs 23.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.