JPH0314303A - Crystal oscillator including thermostat - Google Patents

Abstract

PURPOSE:To improve mechanical intensity without increasing effective height by directly fixing a package holding a crystal oscillator on a heating member planely set up on a substrate and forming slits on the periphery of the part of the substrate on which the heating member is set up. CONSTITUTION:Respective leads 33 extended from the substrate 31, an oscillator control part 35 and a heater control part 37 are arranged on the substrate 31, a plate-like or baked heater 39 is also arranged on the substrate 31, the slits 41 are formed on the substrate 31 so as to surround the heater 39, and the crystal oscillator 43 is mounted on the heater 39. A temperature sensing element for detecting the inside temperature of the crystal oscillator is arrange don the substrate 31 in the vicinity of the heater 39 and its detecting signal is outputted to a heater control circuit 37 to control current or the like flowing into the heater and control the temperature. Consequently, the using efficiency of heat in a thermostat is improved, power consumption is reduced, the mechanical intensity of parts is improved, and the crystal oscillator including the thermostat is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field in Icheon) The present invention relates to a crystal oscillator, and more particularly to the structure of a constant temperature sliding type crystal oscillator which has a crystal oscillator, a heater, and an oscillation circuit.

(Prior art) In recent years, there has been a push toward miniaturization of various communication devices and electronic devices. High-quality properties of each bolt part used in the design are also desired.

Also. Crystal resonators used in various electronic devices have the property that their oscillation frequency fluctuates due to changes in ambient temperature.In order to compensate for these fluctuations, conventional methods of temperature compensation using a thermistor, etc. have been used. 1-4 i=The force method is used to suppress fluctuations in the oscillation frequency by enclosing a water vibrator in a tank or the like and keeping the ambient temperature of the water vibration f constant.

Among these methods of stabilizing the oscillation frequency of each persimmon, one method of crystal oscillation using a temperature bath is to use a water oscillator to adjust the frequency ri! This is to stabilize the frequency of the oscillator by keeping the temperature at zero temperature coefficient temperature (ZCT) with lf4 degree characteristic.

Fig. 2 18l [b] shows a conventional constant temperature bath human water product oscillator.
l is a crystal oscillator. 13 is a case for enclosing the crystal resonator in pure air or inert gas; 15 is the case holder 3;
The case l3 is held in an erected state by a support member 17 made of a heat insulating material.

Also, 5? ! Electronic components 21 constituting the vibration path and the heater control path are enclosed, and these components are covered with an outer casing 23 and filled with a heat insulating material or the like.

The crystal oscillator configured in this manner detects the internal centering temperature using the heat-sensitive element 25 provided inside the casing to maintain the inside of the tank at the zero temperature counting temperature of the water quality vibrator frequency of 4 degrees. For example, 60 to 70°C using the heater.
The melon is heated to stabilize the oscillation frequency.

However, the constant temperature bath human water lI′1 configured in this way
Because the oscillator holds the crystal oscillator in an erected state, the structure is not only complicated and human-shaped, but also because the insulating support member is held upside down to hold the quartz oscillator, its mechanical strength is low, and the parts are expensive. There was a problem that the size became large.

(Elements of the invention) The present invention has been made in view of the above-mentioned problems, and includes:
It is an object of the present invention to provide a constant-temperature-bathed crystal resonator with low mechanical strength without increasing the effective height.

(Summary of the Invention) In order to achieve the first objective, the thermostatic oven-encased crystal resonator of the present invention is a thermostatic oven-encased crystal resonator in which a crystal resonator, a heater member, an oscillation circuit, a heat insulating filler, etc. are disposed inside a housing. In the vibrator, a heating member was provided on the substrate-H in an Iε plane, and a package holding a crystal vibration r was directly fixed to the heating member, and a heating member of the +iii message board was placed. Mounting 1. by providing slits around the periphery to improve the heat insulation effect. No, it's low and turned off by a heater 7'2? It is characterized by reduced fI Y'l ifX force.

(Example) The present invention will now be described based on the example shown in the drawings. :゜E
Explain in detail.

Figure I! al fb) is ゜Example 11 of the present invention
The circuit board 31 is provided with leads 33 extending from the circuit board 3l, an oscillator control section 35, and a heater control section 37. 39 is arranged 1d. A slit 4l is provided in the speaker plate 3l so as to surround the heater 39, and a crystal oscillator 43 is placed above the heater 39.

Also, fin plate 3 1-L. A temperature sensing element r (not shown) for detecting the temperature inside the crystal oscillator is provided near the heater 39, and the detection signal is output to the heater control path 37 to control the temperature of the heater. The temperature is adjusted by controlling the current flow. In history, each of these inserted components was covered with a case 45, and the inside was filled with a heat insulating material with low thermal conductivity to protect it. I'm wearing (9) crystals. However, compared to the conventional constant-temperature bath water product vibration r configured in this way, a heating member is formed or placed directly on the H plate L, and a water product oscillator is directly placed on the heater. By fixing the slit, the effective height can be reduced and the heat generated by the heater can be applied to the crystal oscillator in an effective manner, and by forming a slit, the heat generated from the heater can escape to the substrate. In order to protect against this, it is possible to improve the insulation effect and make it a small cape.

Therefore, the electric power required for heating can be reduced to about 100% compared to conventional products.

Since it does not use a supporting member made of a heat insulating material, which was required in the past, the mechanical strength is the same as above, and it can be used in electric machines mounted on moving objects or automobiles.

(Effects of the Invention) As described above, the present invention not only increases the heat ratio and slope in the constant temperature cell I9 and reduces the γ11 power consumption, but also improves the mechanical strength of the parts. It is possible to downsize the thermal bath crystal resonator.

[Brief explanation of drawings]

Figure 1 (al (b) is a tenth view and sectional view showing one embodiment of the present invention, Figure 2 (al (bl) is a conventional 'l
FIG. 3 is a diagram showing a vibrator for bathing in a hot tank. l1, 43...Crystal resonator. 13.45...Case, 15, 39...Heater. 17... Supporting member, 19
．． 31... Noyo board, 21... Electronic parts, 23...
Outer housing, 25... Heat sensitive element, 33... Lead, 35
... Oscillator control section, 37... Heater control section, 41.
...Slit patent applicant Toyo Tsushinki Co., Ltd.

Claims (1)

[Claims] In a constant-temperature bath-enclosed crystal resonator in which an oscillation circuit including a crystal resonator, a heater member, a heat insulating filler, etc. are arranged inside a housing, a heating member is provided flatly on a substrate, and a crystal oscillator is placed on the heating member. In addition to directly fixing the package holding the device, a slit is provided around the board where the heating member is placed to improve the heat insulation effect, thereby lowering the mounting height and reducing power consumption by the heater. A thermostatic oven-contained crystal oscillator.