JPH0618387Y2 - Electronic counter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an electronic counting device such as a counter or an hour meter having a liquid crystal display element.

[Prior Art] Conventionally, an electronic counting device such as a counter for inputting an external count signal and displaying the number of inputs or an hour meter for integrating and displaying the input signal time is classified into a printed circuit board mounting type and a panel mounting type. In the former case, a driving power source is usually obtained from a power source (battery) mounted on a printed circuit board, and in the latter case, a driving power source battery is incorporated.

[Problems to be Solved by the Invention] However, in the conventional example, there are problems that inventory management is not easy because they are manufactured corresponding to each type, and costs are high because parts are not shared.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic counting device that has a mounting structure that can be developed for both a panel mounting type and a printed circuit board mounting type, and uses common parts. To provide.

[Means for Solving the Problems] The present invention is to install a liquid crystal display element and a printed circuit board on which an electronic circuit is mounted in this order in a case with an opening on one side, and to install the liquid crystal display element from the side of the case on the non-opening side. A block is formed to face the display surface of, and the printed circuit board placed on the opening side has a connection hole for connecting and fixing the legs of the terminal metal fittings of the printed circuit board mounting type terminal block and the board mounting type terminal block. Connection holes for connecting and fixing the legs of the terminal fittings are provided respectively.

[Operation] Thus, in the printed circuit board mounting type, the terminal block is fitted into the opening of the case to connect and fix the legs of the terminal fittings to the printed circuit board, and in the board surface mounting type, the block is housed in the outer case. Each type of electronic counting device is completed by fitting the terminal block into the bottom opening of the outer case and connecting and fixing the legs of the terminal fitting to the printed circuit board.

[Embodiment] FIG. 1 is a sectional view of a printed circuit board mounting type embodiment.
FIG. 2 shows an exploded perspective view of the liquid crystal display element 2 in the case 1 having a lower opening made of transparent synthetic resin.
A printed circuit board having a function of processing an external input signal into a signal that can be input to the CPU mounted on the printed circuit board 4; A substrate 5 and the like are stored and mounted. A terminal block 7 made of a synthetic resin molded product is fitted in the lower surface opening, and locking claws 8 provided on both side surfaces of the terminal block 7 are fitted into locking holes 9 provided on both side surfaces of the case 1. By locking from inside the case 1, the terminal block 7 is fixed to the case 1.

The liquid crystal display element 2 is for displaying a numerical value corresponding to an input signal, is arranged near the inside of the upper surface of the case 1, and has a structure in which the surface display can be read from the outside through the upper surface of the case 1. . A plurality of electrode patterns are provided on a part of the back surface of the liquid crystal display element 2.

The rubber connector 3 has a conductive function and is for connecting between the electrode pattern of the liquid crystal display element 2 and the electrode 4a provided corresponding to the printed circuit board 4.

The electronic circuit of the printed circuit board 4 comprises a circuit that detects a numerical value corresponding to an external input signal and instructs the liquid crystal display element 2 to display.

Here, as the external input signal, a relay contact, a non-voltage input such as an open collector of a transistor, or AC / DC
There are two types of voltage input.

Thus, the printed wiring boards 4 and 5 are connected by the lead wire 10.

The terminal block 7 has four terminal fittings 11 (shown in FIG. 3) fixed to the four corners at the same time by through-molding, press fitting, etc., and the upper leg 11a of the terminal fitting 11 is provided on the printed circuit board 5 through a connection hole. The printed circuit board 5 is supported and electrically connected to the printed wiring board 5 by being fitted into the printed wiring board 12 and fixed to the pattern portion 13 having the connection hole 12 by soldering. The present apparatus is mounted on the printed board 14 by soldering the two legs 11b at the other end of each terminal 11 to the printed board 14.

On the upper surface of the case 1, a name plate 15 having a transparent central portion and an opaque outer peripheral portion and having letters d, h, m, s indicating time units printed thereon is attached.

FIG. 4 is a sectional view of the embodiment when mounted on a board, and FIG. 5 is an exploded perspective view thereof. In this embodiment, a case 1, a liquid crystal display element 2, a connector 3, and printed boards 4 and 5 are used. The block is a common component to the above embodiment, and a battery 16 serving as a driving power source is provided on the lower surface of the printed circuit board 5.
Is attached. Then, these components are accommodated in the case 1, and are accommodated in a board-mounted type synthetic resin outer case 17. The outer case 17 has a window hole 17a at the center of its upper surface, and the name plate 1 is formed so as to surround the window hole 17a.
5 is attached to the upper surface of the outer case 17.

Further, the terminal block 18 is fitted into the opening on the lower surface, and the locking claws 19 provided on both side surfaces of the terminal block 18 are locked in the locking holes 20 provided on both side surfaces of the outer case 17 so that the terminal block 18 can be held. Is fixed to the outer case 17. Here, terminal fittings 21 as shown in FIG. 6 are fixed to both ends of the terminal block 18 by inserts or the like, and the legs 21a of the terminal fittings 21 are formed as notches corresponding to both ends of the printed circuit board 5. The same pattern portion 13 as the connection hole 12 is fitted into the connection hole 22 made of
Then, the printed circuit board 5 is fixed to the terminal block 18 and electrically connected. Each terminal fitting 21 is provided with a crucible screw portion 24 on which a terminal screw 23 is screwed on the lower surface of the terminal block 18, and the terminal screw 23 can connect an external input line.

FIG. 7 is a perspective view of the completed electronic counter of the present invention, which is mounted on a board surface. As shown in FIG.
Of the board surface mounting spring 26 by engaging the ends of the board surface mounting spring 26 with the notches 25 provided at both ends of the opening edge on the terminal block 18 side.
Is attached.

As shown in FIG. 8, the mounting on the board surface is carried out by fitting it into the window hole formed in the panel 27 from the front surface of the panel 27 by the flange portion 17b of the outer case 17 and the board surface mounting spring 26. It is performed by sandwiching the panel 27. FIG. 9 is a view seen from the rear surface side of the panel 27.

[Effects of the Invention] The present invention displays a liquid crystal display element from the surface of the case on the non-opening side by sequentially mounting the liquid crystal display element and the printed circuit board on which the electronic circuit is mounted in the case having one surface side opened from the non-opening side. A block is formed to face the surface, and the printed circuit board placed on the opening side has connection holes for connecting and fixing the legs of the terminal block of the printed circuit board mounting type terminal and the terminal block of the board mounting type terminal block. Each of them has a connection hole for connecting and fixing the legs of, and in the printed circuit board mounting type, the terminal block is fitted into the opening of the case to connect and fix the legs of the terminal metal fittings to the printed circuit board. It is housed in an outer case and the terminal block is fitted into the bottom opening of the outer case to connect and fix the legs of the terminal fittings to the printed circuit board. It can be used as a common component with the surface mounting type, and by blocking it can respond quickly to both types, and it can respond to the user with a short delivery time.
There is an advantage that the number of stocks is small and the cost is low.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same as above, FIG. 3 is a perspective view of a terminal fitting of the same as above, and FIG. 4 is a sectional view of another embodiment of the present invention. Fig. 5 is an exploded perspective view of the same as above, Fig. 6 is a perspective view of the terminal fittings of the same as above, Fig. 7 is a perspective view of the same as above in a completed state, and Figs. It is a figure and a rear view. 1 is a case, 2 is a liquid crystal display element, 5 is a printed circuit board, 7
Is a terminal block, 11 terminal fittings, 11a is a leg, 17 is an outer case, 18 is a terminal block, 21 is a terminal fitting, and 21a is a leg.

Claims (1)

[Scope of utility model registration request] 1. A liquid crystal display element and a printed circuit board on which an electronic circuit is mounted are sequentially mounted in a case whose one surface side is open from the non-opening side, and the display surface of the liquid crystal display element is exposed from the non-opening side of the case. On the printed circuit board that is formed on the opening side, a connecting hole for connecting and fixing the legs of the terminal block of the PCB mounting type terminal and the legs of the terminal block of the board mounting type terminal block are formed. Connection holes for connecting and fixing are provided respectively.In the printed circuit board mounting type, the terminal block is fitted in the opening of the case to connect and fix the legs of the terminal fittings to the printed circuit board. An electronic counting device that is housed in a housing and is fitted with a terminal block in the bottom opening of the outer case to connect and fix the legs of the terminal fitting to the printed circuit board.