JPH04107918U - Crystal oscillator - Google Patents

Abstract

(57) [Summary] [Purpose] To create a structure that is strong against torsional damage that is applied to the crystal plate via the two connection terminals when the crystal resonator is dropped. [Configuration] 2 protruding from the bottom of the base 6 of the protective case 5
It has a structure in which the connection terminals 41, 42 of the book and the conductive parts 2a, 3a of the electrodes 2, 3 of the crystal plate 1 are connected and held by one set of support wires 21, 31, and one set of support wires 2
Connection holding points P1, P2 for connecting the crystal plate 1 to 1, 31
are located below the horizontal center line L0 of the crystal plate 1, and the distance D between these connection and holding points is smaller than the diameter of the crystal plate 1.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention has a thin crystal plate built into the protective case, and two crystal plates are inserted from the bottom of the case. This invention relates to an improvement in a crystal resonator having a structure in which connecting terminals are led out.

0002

[Conventional technology]

The crystal resonator 100 is equipped with an operating switch 202a as shown in FIG. A wireless transmitter 200 configured by combining a body part 202 and a lower body part 203 It is mounted on the circuit board 201 and used as a high frequency generation source such as 204 is a battery that serves as a driving source for the wireless transmitter, and 205 is a battery 2. 04), this type of crystal resonator 100 is shown in FIG. As shown in , an insulating tube ( An extremely thin and brittle disk-shaped crystal plate 102 is housed in the crystal plate (not shown). A pair of electrode parts 103 and 104 are provided at the center of both the front and back sides of the 03 and 104, constricted conductive parts 103a and 104a are formed on the periphery of the crystal plate 102. A piano wire or the like is extended to each of the constricted conductive parts 103a and 104a. Connect and hold the upper ends 105a, 106a of the support wires 105, 106 made of connect as points P1', P2' and under each of its support wires 105, 106. The ends 105b and 106b are below the base 107 fixed to the lower part of the protective case 101. A structure in which the two connecting terminals 108 and 109 led out to the side are connected by soldering etc. The connection holding point of the crystal plate 102 is located on the horizontal center line L0 of the crystal plate 102. The distance D' between the two is set so that the crystal plate 102 can be stably held. The size is equal to the diameter of 2.

0003

[Problem that the idea aims to solve]

However, if such a crystal resonator 100 is used internally in a wireless transmitter 200, etc. When using the wireless transmitter 200 in storage, dropping the wireless transmitter 200 may cause damage to the device. to the two connection terminals 108 and 109 connected to the circuit board 201 by soldering. Twisting force is applied, and the torsional stress at this time causes the torsion to be housed in the protective case 101. In some cases, the fragile crystal plate 102 may be broken.

0004

[Means to solve the problem]

The present invention was developed in view of these circumstances, and is designed to prevent circuit boards from being dropped. To provide a crystal resonator having a structure that is resistant to breakage even when subjected to a strong shock. It is an object.

[0005]

[Effect]

According to the crystal oscillator of the present invention, a set of saunas are connected to and hold the crystal plate. The connection holding point of the port wire is located below the horizontal center line of the crystal plate, and both connections Since the distance D between the holding points is smaller than the diameter of the crystal plate, the crystal resonator cannot be dropped. The twist applied to distort the crystal plate through the two connection terminals when the crystal plate is The stress is also lower than that of conventional structures, so it will not break even if it is hit by a fall. Hard to occur.

[0006]

【Example】

An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show an embodiment of the crystal resonator of the present invention. The crystal resonator A is housed in an insulating tube (not shown) inside a protective case 5 made of nickel silver or the like. ) has an ultra-thin and brittle disk-shaped crystal plate 1 built-in, and both the front and back sides sandwiching this crystal plate 1. A pair of electrode parts 2 and 3 are provided at the center of the surface, and the electrode parts 2 and 3 are connected to the crystal plate 1. table , constricted conductive parts 2a, 3a extend from the periphery of the back surface, and these conductive parts 2a, 3 Upper ends 21a, 31a of support wires 21, 31 made of piano wire etc. Solder them as connection holding points P1 and P2, and connect them under these support wires 21 and 31. Two wires whose ends extend downward from the base 6 attached to the lower opening of the protective case 5. After wrapping the upper ends of the connection terminals 41 and 42 of 21b and 31b, soldering It's stuck. Here, each of the support wires 21 and 31 described above has its connection holding point P1 and P 2 is located below the horizontal center line L0 of the crystal plate 1, and the distance between one set of connection holding points is D is smaller than the diameter of the crystal plate 1, so that the center 1a and the above pair of supports are The angle θ formed by the connection holding points P1 and P2 of the root wires 21 and 31 is less than 180 degrees. It has become. Therefore, in the crystal resonator A of the present invention, the distance between the connection and holding points that hold the crystal plate 1 is D is smaller than that of the conventional structure shown in FIG. The required dimensions of the support wires 21 and 31 connecting the crystal plate 1 and the crystal plate 1 are also reduced. For this reason, the two connection terminals 41 and 42 may be damaged by the impact applied when dropped. Even when the crystal plate 1 receives a force in the torsional direction through the It has a structure that is more resistant to destruction than other materials.

[0007] Figure 3 is an explanatory diagram of the drop destruction test conducted on the present invention, and is an explanatory diagram of the wireless In the circuit board 201 of the transmitter 200, the crystal resonator A of the present invention and the conventional structure are installed. Mount it, set the height H to 1.5m, and drop it on the floor F by applying a slight external force. This article explains the procedure for a drop fracture test conducted to investigate the fracture rate of quartz crystal plates.

[0008] Figure 4 shows that the drop fracture test shown in Figure 3 was carried out on the present invention A and the conventional structure 100. This is the failure rate comparison data of the test results obtained by comparing the failure rates. The vertical axis shows the failure rate. ● indicates an example of the present invention, and △ indicates a conventional example, as can be seen at a glance in Figure 4. , the crystal resonator A of the present invention has a significantly reduced failure rate compared to the conventional structure 100. Good results have been obtained.

[0009]

【effect】

As explained above, according to the present invention, the distance between the connecting and holding points of the crystal plate is small. , and the required dimension of the support wire that connects the connection terminal and the crystal plate is also shortened. Therefore, even when the two connecting terminals receive torsional force, the strain stress on the crystal plate is also reduced. As a result, the structure becomes resistant to breakage when the crystal resonator is dropped.

[Brief explanation of drawings]

FIG. 1 is a structural explanatory diagram showing an embodiment of the present invention in which a crystal plate of the present invention is removed from a protective case.

FIG. 2 is a diagram showing the crystal plate of the present invention housed in a protective case.

FIG. 3 is an explanatory diagram of a drop fracture test for testing the effects of the present invention.

FIG. 4 is a graph showing the results of a drop fracture test.

FIG. 5 is a structural explanatory diagram of a conventional crystal resonator.

FIG. 6 is an explanatory diagram of a wireless transmitter equipped with a crystal resonator.

[Explanation of symbols]

A...Crystal resonator of the present invention 1...Crystal plate 2, 3...electrode part 2a, 3a...conductive part P1, P2...Connection holding points 21, 31...Support wire 41, 42... Connection terminal 5...Protective case 6...Base L0...Horizontal center line D... Distance between connection holding points

Claims (1)

[Scope of utility model registration request] [Claim 1] A pair of electrode parts are provided at the center of the front and back surfaces of the crystal plate so as to sandwich a thin crystal plate housed in a protective case, and each of these electrode parts connects the front and back surfaces of the crystal plate. A set of conductive parts led out from the periphery is provided, and the upper ends of a set of support wires whose lower ends are fixed to two connection terminals protruding from below the base of the protective case are connected to the set of conductive parts. In the crystal resonator which is fixed as a holding point, the distance between the connecting and holding points of the pair of support wires is smaller than the diameter of the crystal plate,
A crystal resonator having a structure in which the above-mentioned pair of connection and holding points are formed below the horizontal center line of the crystal plate.