JPH06196870A - Control apparatus - Google Patents

Abstract

PURPOSE:To ensure a wide space at the side-face part of a front board, to form a plufality of solder bridges, to attach a DIP switch to the space and to eliminate a problem that a hole is opened in the display part of a set value at a case body. CONSTITUTION:At least one' hook part which is installed at the corner part of a front case 9 for a front assembly 1 and which is coupled to a coupling protrusion at a board assembly excluding a front board is constituted by forming first coupling pieces 16a(17a which protrude to the rear from a case body 14 at the front case 9 and which are provided with coupling holes to the side of the case body 14 from the first coupling pieces 16a, 17a and which sandwich and hold the front board 3 together with the case body 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device such as a counter.

[0002]

2. Description of the Related Art Conventional control devices, such as counters,
As shown in FIGS. 12 and 13, the front assembly 40
A base 57, a front board 42, upper and lower boards 43 and 44, left and right boards 45 and 46, and a base 57.
Is equipped with.

The front assembly 40 has a front case 47, and the front case 47 has a rectangular case body 48, and a set value display section 49 is provided on the front surface of the case body 48. And a plurality of key holes 50, 5 formed vertically below the set value display section 49.
1 and are provided. A switch mechanism mounting portion (not shown) is formed on the back surface of the case body 48.

Hook parts 52 are formed so as to project rearward near the four corners of the case body 48. These hook portions 52 have a linear shape, and a locking hole 52a extending in the front-rear direction is formed in the central portion thereof. Further, a hook portion 53 is provided at the center of each of the upper portion and the left and right portions of the case body 48, and the hook portion 53 has a locking hole 53c. A locking projection 54 is provided at the center of the upper and left edges of the front board 42.

Then, an LCD is mounted on the front case 47.
55, and the rubber connector 56 is inserted in the grooves (not shown) of the front case 47 and LCD 55. Next, the hack light 55a is inserted and the front substrate 42 is inserted and locked in the front case 47. In this case, the upper edge of the front board 42 and the left side of the front board 42 are inserted into the locking holes 53a of the hooks 53 in the upper and left and right parts of the case body 48, respectively.
The locking projection 54 on the right edge is locked. Further, the shield is soldered to the front substrate 42.

Then, the base 57 and the upper, lower, left and right printed circuit boards 43, 44, 45, 46 are assembled, these printed circuit boards 43, 44, 45, 46 are fitted into the front assembly 40, and the hook portion 52 is engaged. The upper and lower printed circuit boards 43, 44 are provided with locking projections 43a, 4a in the stop hole 52a.
4a is locked.

[0007]

However, in the above-mentioned conventional control device, since the width of the hook portion 53 is wide and the hook portion 53 is located on the side surface portion of the front substrate 42, There is a problem that it is difficult to secure a space for mounting many solder bridges 63 and DIP switches because many parts cannot be used.

Further, in order to effectively utilize the side surface portion of the front substrate 42, a hook portion 53 as shown in FIGS. 15 and 16 may be used, but the hook portion 53 is used.
It is necessary to form a locking portion 53b on this, and for this reason,
There is a problem in that a hole 62 is opened in the set value display portion 49 of the case main body 48 on the mold as shown in FIG. 16, which is bad in appearance and cannot secure the waterproofness of the front surface.

The present invention has been made in view of the above problems. A first object of the present invention is to secure a wide space on a side surface portion of a front substrate and to provide a plurality of solder bridges. In addition to being able to form a dip switch instead of a solder bridge in this space, it also solves the problem of opening a hole in the set value display section of the case body. It is to provide a control device that can.

A second object of the present invention is to securely attach the front substrate to the front assembly simply by inserting the front end of the hook portion into the notch portion of the front substrate and pushing it in. To provide a control device.

A third object of the present invention is to prevent the set value from being hidden by the operator's finger when the key switch is operated, and not to be invisible.・ Even if you operate each down key, you do not have to worry about the other up / down key touching your finger and making a mistake.In addition, you can move your finger up and down to feel like a seesaw key. It is to provide a control device capable of operating the lower up / down keys.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above first object, the present invention provides a locking protrusion of a board assembly, which is provided at a corner portion of a front case of the front assembly and excludes the front board. A first locking piece having at least one of the locking hooks protruding rearward from the case body of the front case and having a locking hole with which the locking projection of the board assembly is locked; It is characterized in that a second locking piece is formed so as to project from the stop piece to the case body side and sandwich the front substrate together with the case body.

In order to achieve the above-mentioned second object, the present invention provides a control device according to claim 1, wherein notches are formed at the corners of the front substrate, and the notches are sandwiched between the notches. The edge portion of the second locking piece portion of the hook portion is locked by inserting the edge portion of the hook portion into the locking portion and inserting the tip portion of the hook portion into the notch portion of the front substrate to push the edge portion. It is characterized in that the second locking piece portion is locked on the locking portion after the second locking piece portion is bent on the edge of the portion to bend the second locking piece portion at its base portion.

In order to achieve the above-mentioned third object, according to the present invention, upper and lower up / down keys of the key switch are provided below the set value display portion of the front case.
The key features of the lower up and down keys are that the inclined surfaces are formed so that the sides facing each other are lower, and the upper up and down keys are higher than the lower up and down keys.

[0015]

According to the structure of claim 1, when the front board is attached to the front assembly, a wide space is secured on the side surface of the front board, so that a plurality of solder bridges can be formed. In addition, it becomes possible to install a DIP switch in this space instead of the solder bridge.

In addition, it is possible to solve the problem that a hole is opened in the set value display portion of the case body on the mold, which is unsightly and makes it impossible to secure the waterproofness of the front surface.

According to the second aspect of the present invention, the front board can be securely attached to the front assembly simply by inserting the tip portion of the hook portion into the notch portion of the front board and pushing it in.

Further, in the structure according to the third aspect of the invention, since the upper and lower up / down keys are provided on the lower side of the set value display portion, the set value can be set by the operator's finger when operating the key switch. Is not hidden and invisible.

Further, when operating the up and down keys of the upper and lower stages, since the inclined surfaces are formed on the respective key tops, the upper and lower keys have a narrow key interval,
Even if you operate the up and down keys at the top and bottom,
There is no need to worry that the other Up / Down key touches your finger and makes a mistake. Further, since the upper and lower up / down keys are arranged close to each other, it is possible to operate the upper / lower up / down keys as if a seesaw key is operated by lightly moving the finger up / down.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a control device according to the present invention in an exploded state, FIG. 2 is a side view of the control device, FIG. 3 is a perspective view of a front case of the control device in a disassembled state from a rear side, and FIG. 4 is the same. It is a perspective view from the front side of the disassembled state of the front case of the control device.

The control device according to the present invention will be described by taking a counter as an example. This counter is the front assembly 1,
Base 2, front substrate 3, upper and lower substrates 4, 5
And left and right substrates 6 and 7.

As shown in FIG. 3, the front assembly 1 has a front panel 8 and a front case 9, and a display portion 11 is formed on the front panel 8 and vertically below the display portion 11. A plurality of key holes 12, 13
And are provided.

The front case 9 is provided with a rectangular case body 14, and a set value display section 15 and a plurality of upper and lower portions formed below the set value display section 15 are provided on the front surface of the case body 14. Key holes (not shown) are provided. A switch mechanism mounting portion 18 is formed on the back surface of the case body 14.

Hook portions 19, 20, 21, and 22 are formed so as to project rearward near the four corners of the case body 14. The left and right hook portions 19, 20 on the upper side have linear locking pieces 19a, 20a, and locking holes 19c, 20c extending in the front-rear direction are formed in the center of the hooking pieces 19a, 20a. Guide grooves 19b and 20b reaching the locking holes 19c and 20c are formed on the back surface.

The lower left and right hook portions 21 and 22 have linear first locking pieces 16a and 17a, and the upper edge portions of the first locking pieces 16a and 17a are diagonally forward and upward. The protruding second locking pieces 16b and 17b are the first locking pieces 16a and 17b.
It is formed integrally with a.

Further, locking holes 21c and 22c are formed in the center of the first locking pieces 16a and 17a along the front-rear direction, and the locking holes 2 are formed on the back surfaces of the first locking pieces 16a and 17a.
Guide groove portions 21b and 22b reaching 1c and 22c are formed. Tapered surfaces may be formed on the inclined upper edge portions 21e and 22e of the second locking pieces 16b and 17b.

A hook portion 23 is provided at the center of the upper portion of the case body 14, and a hook hole 23c is formed in the hook portion 23.

Then, the front panel 8 is attached to the front surface of the case body 14, and the switch mechanism mounting portion 18 is attached.
The front assembly 1 is constructed by attaching the key switch 24 to the front.

The key switch 24 includes a switch rubber 29, upper and lower up / down keys 30 and 31 provided on the switch rubber 29, and a switch retainer 32.
And the switch rubber 29 is inserted into the switch mechanism mounting portion 18, and then the switch retainer 32 is fitted into the switch mechanism mounting portion 18. The upper and lower up / down keys are provided. The tip portions of 30 and 31 penetrate the key holes of the case body 14 and the key holes 12 and 13 of the front panel 8 and project forward. Then, as shown in FIG. 9, a front end portion (key top) of the up / down key 30 on the upper stage is an inclined surface portion 30a which inclines downward.
Is formed, and a front end portion (key top) of the lower up / down key 31 is formed with an inclined surface portion 31a inclined upward.

At the center of the upper edge of the front substrate 3, there is provided a locking projection 25 as shown in FIG. 4, and notches 26 are formed at the upper, lower, left and right corners of the front substrate 3. 27
Is formed, and the edge portion sandwiched by these cutout portions 26, 27 serves as a locking portion 28. The LCD 10 is mounted on the mounting surface of the front substrate 3, and a plurality of switch patterns (not shown) are provided below the LCD 10 on the mounting surface.

A plurality of locking holes 4a are formed in the surface portions of the upper and lower substrates 4 and 5, and the left and right edges of the upper and lower substrates 4 and 5 are in front of them. Locking protrusions 4b and 5b are formed. A plurality of locking protrusions 6a and 7a are formed on the left and right substrates 6 and 7, respectively.

Then, first, the front substrate 3 is attached to the front assembly 1. That is, the upper left and right hook portions 19 and 20 of the front assembly 1 are inserted into the upper left and right cutout portions 26 of the front substrate 3, and the tip portions of the lower left and right hook portions 21 and 22 are formed as described above. The front substrate 3 is inserted into the left and right cutouts 27 on the lower side. At this time, the first left and right hook portions 21 and 22 of the lower hook portions 21 and 22 have their first locking pieces 16a and 17a bent in the direction of a at their bases, as shown in FIG.

Next, by pushing in the front assembly 1, the inclined upper edge portions 21e and 22e of the second engaging piece portions 16b and 17b of the lower left and right hook portions 21 and 22 are pushed.
Is pressed against the lower edge portion 28a of the locking portion 28 formed by the edge portions sandwiched by the cutout portions 26 and 27, and the upper edge portions 21e and 22e of the locking portion 28 are moved to the lower edge portion 28a of the locking portion 28. The second locking piece portions 21b and 22b are moved to the position shown in FIG.
As shown in FIG.

Further, by pushing in the front assembly 1, the second locking pieces 16b and 17b are locked to the locking portion 28 as shown in FIG. 6, and the locking hole 23a of the hook portion 23 is formed. The locking projection 25 of the front substrate 3 is locked to the front substrate 3 and the front substrate 3 is attached to the front assembly 1.
In this case, the LCD 10 is inserted in the rear of the set value display portion 15 of the case body 14, and the print contacts 29a at the rear end portions of the upper and lower up / down keys 30 and 31 of the key switch 24 are the switch. Face the pattern.

In this way, when the front board 3 is attached to the front assembly 1, the upper left and right hook portions 19, 20 and the lower left and right hook portions 21, 22 are provided on the side surface of the front board 3. A wide space is secured between the second locking pieces 16b and 17b.

The engaging protrusions 6a and 7a of the left and right substrates 6 and 7 are engaged with the engaging holes 4a and 5a of the upper and lower substrates 4 and 5, respectively.
Further, the locking pieces 4c and 5c formed on the rear edges of the upper and lower substrates 4 and 5 are locked to the upper and lower locking recesses 2a and 2b of the base 2, respectively. , The lower side boards 4, 5 and the left side, the right side boards 6, 7 and the base 2 are assembled, and the front side board 3
A substrate assembly is configured except for.

Then, the upper left and right hook portions 19, 20
The left and right locking projections 4b of the upper substrate 4 are inserted into the guide groove portions 19b and 20b of the upper board 4 and the lower left and right hook portions 2 are formed.
The left and right engaging protrusions 5b of the lower substrate 5 are inserted into the guide groove portions 21b and 22b of the first and the second portions 22, respectively.

In this state, by pushing in the front assembly 1 having the front board 3 mounted thereon, the engaging holes 19 of the upper and lower left and right hook portions 19, 20, 21, 22 are formed.
c, 20c, 21c, 22c, the locking protrusions 4b, 5b of the upper and lower substrates 4, 5 are locked, and the connection patterns of the upper and lower substrates 4, 5 are connected to the connection pattern of the front substrate 3 and By connecting the connection patterns of the left and right substrates 6 and 7 with the solder bridge 32, the front substrate 3 is connected to the front edge portions of the upper and lower substrates 4 and 5 and the front edge portions of the left and right substrate 6 and 7. Fixed.

Then, a cover (not shown) is attached to the front assembly 1 and the board assembly to form a counter.

In the above embodiment, when the front board 3 is attached to the front assembly 1, the side boards of the front board 3 are provided with hooks 19 and 20 on the upper and left sides and left and right hooks on the lower side. The second locking piece portion 16 of the hook portions 21 and 22
In order to secure a wide space between b and 17b,
It becomes possible to form a plurality of the solder bridges 32, and, as shown in FIGS. 8A and 8B, a dip switch 33 is attached to the left and right substrates 6 and 7 instead of the solder bridges 32. Will be possible.

The up / down keys 30, 31 on the upper and lower sides of the key switch 24 are provided on the lower side of the set value display section 15, and the up / down keys 30, 31 on the upper and lower stages are also provided. As shown in FIG. 9, the key tops have inclined surfaces 30a and 31a so that the sides facing each other are lowered.
Is formed, and the up / down key 3 at the bottom is
The up / down key 30 in the upper row above 1 is raised.

As described above, since the upper and lower up / down keys 30 and 31 are provided on the lower side of the set value display portion 15, when the key switch 24 is operated, the operator's finger 3 is pressed.
The setting value of 4 does not obscure the setting value.

Further, as shown in FIGS. 10 and 11, when the up / down keys 30 and 31 at the upper and lower stages are operated, the inclined surfaces 30a and 31a are formed on the respective key tops, so Above, despite the narrow key spacing of
Even if each of the lower up / down keys 30 and 31 is operated, there is no fear that the other up / down key touches the finger 34 and is erroneously operated. Also, since the upper and lower up / down keys 30, 31 are located close to each other, lightly moving the finger up and down makes the upper and lower up / down keys 30, 31 feel like seesaw keys. Can be operated.

Further, the key switch 24 is formed by pressing the up / down keys 30 and 31 on the switch pattern provided on the front substrate 3 to short-circuit the printed contact 29a printed on the back surface of the switch rubber 29. Since the switch is configured, the number of parts is smaller than that of the thumb rotary switch, the assembly is easy, and the switch can be configured at a low cost.

[0045]

As described above, according to the present invention, at least one of the hook portions provided at the corners of the front case of the front assembly and engaged with the engagement protrusions of the board assembly excluding the front board is provided. A first locking piece projecting rearward from the case body of the front case and having a locking hole with which the locking projection of the board assembly is locked; Since the second locking piece that holds the board together with the case body is formed, when the front board is attached to the front assembly, a wide space is secured in the side surface portion of the front board. It becomes possible to form multiple solder bridges,
Also, it becomes possible to install a DIP switch in this space instead of the solder bridge. In addition, it is possible to solve the problem that a hole is opened in the set value display portion of the case body on the die, which is unsightly and makes it impossible to secure the waterproofness of the front surface.

Further, according to the present invention, in the control device according to claim 1, notches are formed at the corners of the front board, and the edges sandwiched by the notches are used as the engaging portions. ,
By inserting and pushing the tip portion of the hook portion into the notch portion of the front board, the edge portion of the second locking piece portion of the hook portion rides on the edge portion of the locking portion and the second engaging member is engaged. After the stop piece portion is bent at its base, the second engagement piece portion is engaged with the engagement portion, so the tip of the hook portion is inserted into the notch portion of the front board and pushed in. Only then can the front board be securely attached to the front assembly.

Further, according to the present invention, the up / down keys at the upper and lower stages of the key switch are provided below the set value display portion of the front case, and the key tops of the up / down keys at the upper and lower stages are opposed to each other. It is characterized in that an inclined surface is formed so that the side to be moved becomes lower, and the up / down key in the upper row is higher than the up / down key in the lower row. Therefore, since the upper and lower up / down keys are provided on the lower side of the set value display unit, the set value is not hidden by the operator's finger when operating the key switch. .

Further, when operating the up and down keys at the upper and lower stages, since the inclined surface is formed on each key top, the upper and lower keys have a narrow key gap,
Even if you operate the up and down keys at the top and bottom,
There is no need to worry that the other Up / Down key touches your finger and makes a mistake. In addition, since the upper and lower up / down keys are located close to each other, you can operate the upper and lower up / down keys with the feeling of seesaw keys by moving your finger up and down. .

[Brief description of drawings]

FIG. 1 is a perspective view of a control device according to the present invention in an exploded state.

FIG. 2 is a side view of the control device.

FIG. 3 is a perspective view from the rear side of the front case of the control device in a disassembled state.

FIG. 4 is a perspective view from the front side in a disassembled state of a front case of the control device.

FIG. 5 is an explanatory diagram of displacement of a hook portion in a front case of the control device.

FIG. 6 is an explanatory diagram showing a state in which the hook portion locks the front substrate in the front case of the control device.

FIG. 7 is an explanatory diagram of a solder bridge in a front board locking portion of the control device.

FIG. 8 (1) is an explanatory view of mounting a dip switch on a front board locking portion of the control device. (2) is an explanatory view of mounting a dip switch on the right side substrate.

FIG. 9 is a side view of the front portion of the control device according to the present invention.

FIG. 10 is an explanatory diagram showing a state where the upper / down key of the upper stage is pressed with a finger in the control device.

FIG. 11 is an explanatory diagram showing a state where the lower up / down key is pressed with a finger in the control device.

FIG. 12 is a perspective view of a conventional control device in an exploded state.

FIG. 13 is a perspective view from the front side in a disassembled state of a front case of a conventional control device.

FIG. 14 is an explanatory diagram of a solder bridge in a front board locking portion of the control device.

FIG. 15 is another perspective view of the hook portion of the front case of the other conventional control device.

FIG. 16 is a perspective view of a front case of the control device in an exploded state.

[Explanation of symbols]

 1 Front Assembly 3 Front Board 5b Locking Protrusion 9 Front Case 14 Case Body 16a, 17a First Locking Piece 16b, 17b Second Locking Piece

Claims (3)

[Claims] 1. At least one hook portion provided at a corner portion of a front case of a front assembly and engaging with an engagement protrusion of a board assembly excluding the front board is projected rearward from a case body of the front case. And a first locking piece having a locking hole for locking the locking projection of the board assembly, and a second locking piece projecting from the first locking piece toward the case body and holding the front board together with the case body. A control device comprising a locking piece formed. 2. A notch is formed at a corner of the front board, an edge portion sandwiched between the notches serves as a locking portion, and a tip portion of the hook portion cuts the front board. After being inserted into the notch portion and pushed in, the edge portion of the second locking piece portion of the hook portion rides on the edge portion of the locking portion to bend the second locking piece portion at its base portion, The control device according to claim 1, wherein the second locking piece portion is locked to the locking portion. 3. The up / down keys on the upper and lower stages of the key switch are provided on the lower side of the set value display section of the front case, and the sides facing the key tops of the up / down keys on the upper and lower stages are lowered. The control device is characterized by forming an inclined surface like this, and making the upper up / down key higher than the lower up / down key.