JPH0536799B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a piezoelectric buzzer in which an external connection lead terminal is fixed to a case made of resin or metal, and a piezoelectric element is housed in the case.

[Prior Art] As shown in FIG. 5, a conventional piezoelectric buzzer has a structure including a base portion 4 and a through hole 12 having a hollow central portion.
From the bottom surface of the base portion 3 of the case a made of resin or metal, into which the cap portion 3 is fitted and integrated, two external connection lead terminals 1 are inserted perpendicularly to the bottom surface. It is common to derive it.

When transporting or temporarily storing the piezoelectric buzzer configured as described above, it is preferable to package multiple piezoelectric buzzers separately in a shipping container, or to provide a large number of storage recesses for storing the piezoelectric buzzers. Generally, the piezoelectric buzzers are arranged in a row on a pallet made of styrofoam.

The piezoelectric buzzers thus transported or temporarily stored are taken out one by one from the container or pallet when manufacturing electronic devices, etc., and after confirming the direction of the lead terminal 1 for external connection, the piezoelectric buzzers are manually assembled by a worker. The lead terminal 1 of the piezoelectric buzzer is inserted into a predetermined position on the circuit board and soldered.

[Problems to be Solved by the Invention] However, the conventional piezoelectric buzzer described above has two
Because the lead terminals 1 of the books are fixed, they tend to bend when packed in bulk in a shipping container. Therefore, when attaching the lead terminals to the circuit board, do not bend the lead terminals 1. It was necessary to correct the problem.

In addition, with the method of packing each piezoelectric buzzer into a pallet, the pallets are bulky and inconvenient to transport or temporarily store, and the lead terminals 1 for external connection are led out in different directions, making it difficult to mount the piezoelectric buzzers on the circuit board. automation was difficult.

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention has been devised to eliminate the bending of external connection lead terminals, reduce bulk during transportation or temporary storage, and reduce mounting work on circuit boards. The purpose is to provide a piezoelectric buzzer that can be automated.

[Means for Solving the Problems] That is, in the present invention, an external connection lead terminal 1 is provided protruding from the lower surface of the base portion 3, and a piezoelectric element 2 is placed in a case a formed from the base portion 3 and the cap portion 4.
In this piezoelectric buzzer, a positioning engagement projection 8 is provided on the outer wall of the cap portion 4 of the case
is provided on the upper surface of the cap part 4 of the case a,
An insertion hole 9 into which the tip of the external connection lead terminal 1 can be inserted is formed, and a spacer 10 is provided at the same position on the top surface of the cap section 4 and the bottom surface of the base section 3.
To provide a piezoelectric buzzer formed by forming 11.

[Function] According to the piezoelectric buzzer according to the present invention, as shown in FIG. When the piezoelectric buzzers are stored in a storage container, the piezoelectric buzzers are sequentially stored in a state in which the engaging protrusions 8 of the piezoelectric buzzers are fitted into storage recesses provided on the inner wall of the storage container. Therefore, the position of the piezoelectric buzzer to be housed is restricted.

Next, on the top surface of the cap part 4 of the case a,
By forming the insertion hole 9 into which the tip of the external connection lead terminal 1 can be inserted, the direction in which the external connection lead terminal 1 is led out is regulated by the engaging protrusion 8 provided on the outer wall. As a result, the tips of the respective external connection lead terminals 1 adjacent to each other in the axial direction are inserted into the insertion holes 9 formed in the upper surface of the cap portion 4 of the piezoelectric buzzer located below it.

As described above, when the tip of the external connection lead terminal 1 is inserted into the insertion hole 9 provided on the top surface of the piezoelectric buzzer located below it and the piezoelectric buzzers are stacked, the cap is further inserted. Spacers 10 and 11, which are formed in a protruding manner at the same position on the top surface of the portion 4 and the bottom surface of the base portion 3, abut on each other.
For this reason, the spacing between the piezoelectric buzzers that are stacked and housed is regulated, and the lead terminal 1 inserted through the insertion hole 9 hits the piezoelectric element 2 housed in the case a of the piezoelectric buzzer. You can store them one after another without any problems.

[Example] Hereinafter, an example of a piezoelectric buzzer according to the present invention will be described with reference to the drawings.

First, as shown in the bottom view of the piezoelectric buzzer according to the present invention in FIG. A pair of lead terminals are formed on the bottom surface of the base portion 3 so as to protrude at positions perpendicularly intersecting a straight line connecting the pair of lead terminals 1.

Next, as shown in the top view of the piezoelectric buzzer according to the present invention in FIG.
Engagement protrusions 8 for positioning are provided symmetrically on the outer wall of the cap portion 4 having a
A pair of insertion holes 9 into which the tips of the external connection lead terminals 1 can be inserted are formed symmetrically on the upper surface, and a spacer 10 is placed at a position perpendicularly intersecting the straight line connecting the pair of insertion holes 9. Form a pair of protrusions.

Furthermore, as shown in FIG. 1, the cap part 4 and base part 3 formed in the above manner are aligned so that the positions of the lead terminal 1 and the insertion hole 9, and the top spacer 10 and bottom spacer 11 are aligned with each other. and fit together to form case a of the piezoelectric buzzer.

When the piezoelectric buzzer formed according to the present invention is stored in a storage container, as shown in FIG. Correspondingly, storage container 13
Two rows of engagement support portions 14 are provided on the left and right inner walls of the
By providing the above-mentioned two rows of engagement support parts 1
A storage recess 15 is formed between the piezoelectric buzzers 4 and 4, and the piezoelectric buzzer is sequentially stored in this storage recess 15 in a fitted state.

Next, as shown in FIG. 2, an insertion hole 9 into which the tip of the external connection lead terminal 1 can be inserted is formed on the upper surface of the cap part 4 of the case a, so that the cap part 4 is adjacent to the cap part 4 in the axial direction. The tip end of each external connection lead terminal 1 is inserted into an insertion hole 9 formed in the upper surface of the cap part 4 of the piezoelectric buzzer located below it.

As described above, when the tip of the external connection lead terminal 1 is inserted into the insertion hole 9 provided on the top surface of the piezoelectric buzzer located below it and the piezoelectric buzzers are stacked, the cap is further inserted. Spacers 10 and 11, which are formed in a protruding manner at the same position on the upper surface of the portion 4 and the bottom surface of the base portion 3, are in contact with each other, and a large number of piezoelectric buzzers are stacked and housed at equal intervals.

Further, in the above embodiment, a pair of symmetrical protrusions were provided on the outer wall of the case a as the engagement protrusions 8 for positioning, but the present invention is not limited to this, and the left and right protrusions may be made asymmetrical. It may be provided at one location or at multiple locations. In this case, as shown in FIG. 4a, if the engagement convex portion 8 is formed in an asymmetrical shape, the shape of the engagement support portion 14 formed on the storage container 13 will also be asymmetrical, so that the engagement support portion 14 formed on the storage container 13 will have an asymmetrical shape. The position of the piezoelectric buzzer is restricted to only one direction.

Further, in the above embodiment, the insertion hole 9 is provided on the top surface of the case a as a hole into which the tip of the external connection lead terminal 1 can be inserted, but the insertion hole 9 is provided on the top surface of the case a. A recess corresponding to No. 1 may be provided, or a notch may be provided.

[Effects of the Invention] As is clear from the above description, according to the piezoelectric buzzer according to the present invention, since the engaging convex portion is formed on the outer wall of the case, the direction in which the lead terminal for external connection is led out is restricted. As a result, they can be arranged in line, making it possible to automate the mounting work on circuit boards.

Furthermore, since the tips of the axially adjacent lead terminals are accommodated in the insertion holes on the top surface of the case, the external connection lead terminals do not bend and do not become bulky during transportation or temporary storage. It is possible to maintain the quality of the buzzer and improve storage efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the whole piezoelectric buzzer according to the present invention, FIG. 2 is a cross-sectional view showing the piezoelectric buzzer according to the present invention stacked and housed in a storage container, and FIG. FIG. 3b is a top view of the piezoelectric buzzer according to the invention, FIG. 3b is a bottom view of the piezoelectric buzzer according to the invention, and FIGS. The figure shows a conventional example of a piezoelectric buzzer. DESCRIPTION OF SYMBOLS 1... Lead terminal, 2... Piezoelectric element, 3... Base part, 4... Cap part, 8... Engaging convex part, 9
...Insertion hole, 10...Top spacer, 11...Bottom spacer, 12...Through hole, 13...Storage container, 14...Engagement support part, 15...Storage recess, a
……Case.

Claims (1)

[Claims] 1 In a piezoelectric buzzer in which a lead terminal for external connection is provided protruding from the lower surface of a base part and a piezoelectric element is housed in a case formed by a base part and a cap part, a positioning part is provided on the outer wall of the cap part of the case. An engaging convex portion is provided, and an insertion hole into which the tip of the external connection lead terminal can be inserted is formed on the top surface of the cap portion of the case, and a spacer is provided at the same position on the top surface of the cap portion and the bottom surface of the base portion. A piezoelectric buzzer characterized by being formed by forming.