CN214014200U - Small-size constant temperature crystal oscillator - Google Patents
Small-size constant temperature crystal oscillator Download PDFInfo
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- CN214014200U CN214014200U CN202023298517.3U CN202023298517U CN214014200U CN 214014200 U CN214014200 U CN 214014200U CN 202023298517 U CN202023298517 U CN 202023298517U CN 214014200 U CN214014200 U CN 214014200U
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Abstract
The utility model relates to an electronic components technical field discloses a small-size constant temperature crystal oscillator, include: the base is provided with a glue dispensing groove for containing viscose glue; the shell is connected to the upper surface of the base and is in sealed connection with the base to form a cavity, the base and the shell are connected through glue dispensing, the lower portion of the side wall of the shell is provided with a knurled structure, and the glue can be attached to the knurled structure in the bonding process; and the constant-temperature oscillation module comprises a quartz crystal, is arranged in the cavity and can keep the quartz crystal to work in a constant-temperature environment. The utility model provides a small-size constant temperature crystal oscillator can improve the firm degree of the enclosure of base and shell, is favorable to miniaturized design.
Description
Technical Field
The utility model relates to an electronic components technical field especially relates to a small-size constant temperature crystal oscillator.
Background
The application of the quartz crystal oscillator has been in history for decades, and the quartz crystal oscillator firmly occupies an important position in the field of electronic communication due to the characteristic of high frequency stability. The quartz crystal oscillator is widely applied to various military and civil electronic products such as satellite communication, telephone systems, navigation, aerospace and the like, wherein the small constant temperature crystal oscillator is used as the crystal oscillator with the highest precision at present, is wider in application and is widely pursued in the market. With the rapid development of the 5G technology, the size requirement of the crystal oscillator is higher and higher, the crystal oscillator gradually tends to be miniaturized, and the requirement of the constant temperature crystal oscillator is more and more strict.
Because the 5G base stations are densely distributed and have small coverage area, the number and the volume of the 5G small base stations are more and less. The package size of the oven controlled crystal oscillator becomes an important factor to be considered. The base of the existing constant-temperature crystal oscillator shell is made of metal materials mostly, the mode of 'resistance welding' is mostly used in the packaging mode, the mode of 'resistance welding' needs to be worn out of the shell periphery, the inherent structural design and the mode of the shell determine that the product is difficult in the aspect of realizing miniaturization, and the requirement on the aspect of producing tooling fixtures is high. At this time, the structure and the mode of the enclosure of the crystal oscillator become the problem which needs to be solved urgently in the miniaturization development of the constant temperature crystal oscillator.
Therefore, a small oven controlled crystal oscillator is needed to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
Based on above, the utility model aims at providing a small-size constant temperature crystal oscillator can improve the firm degree of the enclosure of base and shell, is favorable to miniaturized design.
In order to achieve the purpose, the utility model adopts the following technical proposal:
provided is a small oven controlled crystal oscillator including:
the glue dispensing device comprises a base, wherein a glue dispensing groove for accommodating glue is formed in the base;
the shell is connected to the upper surface of the base and is in sealed connection with the base to form a cavity, the base is in adhesive dispensing connection with the shell, the lower portion of the side wall of the shell is provided with a knurled structure, and the adhesive can be attached to the knurled structure in the bonding process; and
the constant-temperature oscillation module comprises a quartz crystal, and is arranged in the cavity and can keep the quartz crystal to work in a constant-temperature environment.
As an alternative of the small oven controlled crystal oscillator, four corners of the upper surface of the base are provided with pillars, and the inner wall of the housing abuts against the side walls of the four pillars, and the pillars can define the mounting position of the housing relative to the base.
As an alternative to the small oven crystal oscillator, the top ends of the posts are each provided with a pad, and the oven oscillation module further includes:
the PCB circuit board sets up along the horizontal direction, be equipped with the etching circuit on the PCB circuit board, the four corners of PCB circuit board respectively with set up in four on the pillar the pad one-to-one is connected, the etching circuit on the PCB circuit board passes through pad and external circuit electricity are connected, quartz crystal locates the lower surface of PCB circuit board, with the etching circuit electricity on the PCB circuit board is connected.
As an alternative of the small-sized constant temperature crystal oscillator, a soldering groove is formed in the top of the support, the soldering pad is arranged in the soldering groove, and the side wall of the soldering groove is abutted to the side wall of the PCB.
As an alternative of a small-sized constant temperature crystal oscillator, the upper surface of the PCB circuit board is provided with a temperature control oscillation assembly, the temperature control oscillation assembly is electrically connected with an etching circuit on the PCB circuit board, and the temperature control oscillation assembly can detect the change of the environmental temperature in the cavity and emit heat.
As an alternative to a compact oven controlled crystal oscillator, the temperature controlled oscillating assembly comprises:
the temperature sensor is electrically connected with the etching circuit on the PCB and used for detecting the ambient temperature in the small-sized constant temperature crystal oscillator;
and the heating element can emit heat, is electrically connected with the etching circuit on the PCB circuit board and is arranged at intervals with the temperature sensor.
As an alternative to a compact oven controlled crystal oscillator, the temperature controlled oscillating assembly further comprises:
and the temperature control chip is electrically connected with the temperature sensor and the heating element through an etching circuit on the PCB circuit board.
As an alternative to a small oven controlled crystal oscillator, the inside of the glue dispensing tank is provided with a cross bar for blocking the flow of glue to the inside of the base.
As an alternative to a small oven controlled crystal oscillator, the base is made of a ceramic material.
As an alternative to a small oven controlled crystal oscillator, the housing is made of a metallic material.
The utility model has the advantages that:
the utility model provides a small-size constant temperature crystal oscillator's base and shell adopt the point to glue technology connection, be used for holding the viscose through set up the point glue groove on the base, set up the annular knurl structure on the lateral wall of shell simultaneously, the annular knurl structure corresponds the setting with the point glue groove, the setting up of annular knurl structure makes the inside and outside both sides of the lateral wall of shell all be equipped with protruding granule, the in-process that carries out high temperature and toast after covering the shell, high temperature toasts and makes the viscose add thermal expansion, the viscose upwards flows along the annular knurl structure on the shell, fully contact with the shell, accomplish the capsule, the area of contact and the degree of depth of viscose and shell have been increased, the capsule fastness has been improved, compare the capsule mode of original "resistance welding", it is peripheral to need not to lose the capsule, more be favorable to realizing the miniaturization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a small oven-controlled crystal oscillator provided by the present invention;
fig. 2 is a schematic view of a partial structure of a small oven controlled crystal oscillator (excluding a housing) provided by the present invention;
FIG. 3 is a schematic diagram of a partial exploded view of a small oven-controlled crystal oscillator (excluding the housing) provided by the present invention;
fig. 4 is a cross-sectional view of a compact oven-controlled crystal oscillator provided by the present invention.
In the figure:
1. a base; 11. dispensing a glue groove; 12. a pillar; 13. a cross bar; 2. a housing; 21. a knurled structure; 3. a temperature control oscillation component; 4. a PCB circuit board; 5. a quartz crystal; 6. a pad; 7. and (4) conducting wires.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 4, the present embodiment provides a small oven-controlled crystal oscillator including a base 1, a case 2, and an oven oscillation module. Wherein, a glue dispensing groove 11 for containing glue is arranged on the base 1; the shell 2 is connected to the upper surface of the base 1 and is in sealed connection with the base 1 to form a cavity, the base 1 and the shell 2 are in adhesive dispensing connection, the lower part of the side wall of the shell 2 is provided with a knurled structure 21, and the adhesive can be attached to the knurled structure 21 in the bonding process; the constant temperature oscillation module comprises a quartz crystal 5, and the constant temperature oscillation module is arranged in the cavity and can keep the quartz crystal 5 to work in a constant temperature environment.
Particularly, the base 1 and the shell 2 that the small-size constant temperature crystal oscillator that this embodiment provided adopt some glue technology to be connected, be used for holding the viscose through set up some glue groove 11 on base 1, set up annular knurl structure 21 on the lateral wall of shell 2 simultaneously, annular knurl structure 21 corresponds the setting with some glue groove 11, annular knurl structure 21's setting makes the inside and outside both sides of the lateral wall of shell 2 all be equipped with protruding granule, the in-process of high temperature toasting is carried out after covering shell 2, high temperature toasts and makes viscose heating expansion, the viscose upwards flows along annular knurl structure 21 on shell 2, fully contact with shell 2, accomplish the capsule, the area of contact and the degree of depth of viscose with shell 2 have been increased, the capsule fastness has been improved, compare original "resistance welds" capsule mode, need not the loss capsule periphery, more be favorable to realizing the miniaturization. Through a simple dispensing method, the precision requirement on production of the tooling jig is reduced, and the problem of encapsulation of the small-sized constant-temperature crystal oscillator in batch production is solved, so that the packaging size of the small-sized crystal oscillator can reach 7mm by 9mm, 7mm by 5mm and even smaller magnitude.
Optionally, the four corners of the upper surface of the base 1 are all provided with the pillars 12, the inner wall of the housing 2 is abutted against the side walls of the four pillars 12, the pillars 12 can limit the installation position of the housing 2 relative to the base 1, the displacement of the enclosure position of the housing 2 and the base 1 is avoided, and the accuracy of the enclosure is improved.
Optionally, the top ends of the pillars 12 are provided with bonding pads 6, the constant temperature oscillation module further comprises a PCB circuit board 4, the PCB circuit board 4 is arranged along the horizontal direction, etching circuits are arranged on the PCB circuit board 4, four corners of the PCB circuit board 4 are respectively connected with the bonding pads 6 arranged on the four pillars 12 in a one-to-one correspondence manner, the etching circuits on the PCB circuit board 4 are electrically connected with an external circuit through the bonding pads 6, and the quartz crystals 5 are arranged on the lower surface of the PCB circuit board 4 and electrically connected with the etching circuits on the PCB circuit board 4. Specifically, the base 1 is provided with a wire 7, and the pad 6 is connected with an external circuit through the extended wire 7.
Preferably, the PCB circuit board 4 is surface mounted on the pads 6.
Further, a soldering groove is formed in the top of the support post 12, the soldering pad 6 is arranged in the soldering groove, and the side wall of the soldering groove is abutted to the side wall of the PCB 4 to limit the installation position between the PCB 4 and the support post 12.
Optionally, the upper surface of the PCB 4 is provided with a temperature control oscillation assembly 3, the temperature control oscillation assembly 3 is electrically connected to an etching circuit on the PCB 4, and the temperature control oscillation assembly 3 can detect the change of the ambient temperature in the cavity and emit heat.
Optionally, the temperature controlled oscillation assembly 3 comprises a temperature sensor electrically connected to an etched circuit on the PCB circuit board 4 for detecting an ambient temperature within the miniature oven controlled crystal oscillator.
Further, the temperature-controlled oscillation assembly 3 further comprises a heating element, the heating element can emit heat, and the heating element is electrically connected with the etching circuit on the PCB 4 and is arranged at intervals with the temperature sensor.
Furthermore, the temperature control oscillation assembly 3 further comprises a temperature control chip, and the temperature control chip is electrically connected with the temperature sensor and the heating element through an etching circuit on the PCB 4. Specifically, when the temperature sensor detects that the ambient temperature in the cavity changes, the temperature sensor sends a detection signal to the temperature control chip, the temperature control chip converts the result into a heating control signal through calculation and comparison and sends the heating control signal to the heating element, and the heating element adjusts the working power according to the heating control signal to adjust the heating amount.
Preferably, the temperature sensor adopts a surface-mounted temperature sensor, so that the performance consistency of the small-sized constant-temperature crystal oscillator is improved, the production processes of dispensing, baking, soldering, cleaning and the like required by the plug-in type temperature sensor are omitted, and the operation risk caused by manpower is effectively avoided.
Preferably, the heating element adopts a surface-mounted heating transistor, and compared with a plug-in heating transistor, the production process is simplified.
Preferably, at least two heating elements are arranged on the PCB 4, so that the adjusting efficiency of the internal environment temperature of the cavity is improved, and the temperature stability is improved.
Optionally, the temperature-controlled oscillating module 3 further includes an oscillating circuit, and the oscillating circuit is connected to the quartz crystal 5.
Optionally, the inner side of the dispensing slot 11 is provided with a cross bar 13 for blocking the adhesive from flowing to the inner side of the base 1, so as to prevent the adhesive from flowing inwards and being difficult to adhere to the housing 2 after the dispensing and baking process.
Preferably, the base 1 is made of a ceramic material or a PCB substrate material.
Preferably, the housing 2 is made of a metal material.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A compact oven-controlled crystal oscillator, comprising:
the glue dispensing device comprises a base (1), wherein a glue dispensing groove (11) for containing glue is formed in the base (1);
the base (1) and the shell (2) are connected through glue dispensing, the lower portion of the side wall of the shell (2) is provided with a knurled structure (21), and the glue can be attached to the knurled structure (21) in the bonding process; and
the constant-temperature oscillation module comprises a quartz crystal (5), and the constant-temperature oscillation module is arranged in the cavity and can keep the quartz crystal (5) to work in a constant-temperature environment.
2. The compact oven controlled crystal oscillator according to claim 1, characterized in that the four corners of the upper surface of the base (1) are provided with pillars (12), the inner wall of the housing (2) abuts against the side walls of the four pillars (12), and the pillars (12) are capable of defining the mounting position of the housing (2) with respect to the base (1).
3. The compact oven-controlled crystal oscillator according to claim 2, characterized in that the top ends of the legs (12) are each provided with a pad (6), the oven oscillating module further comprising:
PCB circuit board (4), set up along the horizontal direction, be equipped with the etching circuit on PCB circuit board (4), the four corners of PCB circuit board (4) respectively with set up in four on pillar (12) pad (6) one-to-one is connected, the etching circuit on PCB circuit board (4) passes through pad (6) are connected with external circuit electricity, quartz crystal (5) are located the lower surface of PCB circuit board (4), with the etching circuit electricity on PCB circuit board (4) is connected.
4. A compact oven controlled crystal oscillator as claimed in claim 3, characterized in that the top of the legs (12) are provided with solder sockets in which the pads (6) are provided, the side walls of which are in abutment with the side walls of the PCB circuit board (4).
5. The small oven controlled crystal oscillator according to claim 3, characterized in that the upper surface of the PCB circuit board (4) is provided with a temperature controlled oscillation component (3), the temperature controlled oscillation component (3) is electrically connected with an etching circuit on the PCB circuit board (4), and the temperature controlled oscillation component (3) can detect the change of the environmental temperature in the cavity and emit heat.
6. The compact oven controlled crystal oscillator according to claim 5, characterized in that the temperature controlled oscillating assembly (3) comprises:
a temperature sensor electrically connected to an etching circuit on the PCB circuit board (4) for detecting an ambient temperature within the miniature oven controlled crystal oscillator;
and the heating element can emit heat and is electrically connected with the etching circuit on the PCB circuit board (4) and is arranged at a distance from the temperature sensor.
7. The compact oven controlled crystal oscillator according to claim 6, characterized in that the temperature controlled oscillating assembly (3) further comprises:
and the temperature control chip is electrically connected with the temperature sensor and the heating element through an etching circuit on the PCB circuit board (4).
8. The compact oven controlled crystal oscillator according to any of claims 1 to 7, characterized in that the inside of the glue dispensing slot (11) is provided with a cross bar (13) for blocking the flow of glue to the inside of the base (1).
9. The compact oven controlled crystal oscillator according to any of claims 1 to 7, characterized in that the base (1) is made of ceramic material.
10. The compact oven controlled crystal oscillator according to any one of claims 1 to 7, characterized in that the housing (2) is made of a metallic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023298517.3U CN214014200U (en) | 2020-12-31 | 2020-12-31 | Small-size constant temperature crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023298517.3U CN214014200U (en) | 2020-12-31 | 2020-12-31 | Small-size constant temperature crystal oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214014200U true CN214014200U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023298517.3U Active CN214014200U (en) | 2020-12-31 | 2020-12-31 | Small-size constant temperature crystal oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214014200U (en) |
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2020
- 2020-12-31 CN CN202023298517.3U patent/CN214014200U/en active Active
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Address after: 523000 Room 401 and 402, building 5, No. 24, industrial East Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee after: Guangdong daguangxin Technology Co.,Ltd. Address before: 523808 the first, second and third floors of building 16, small and medium-sized science and technology enterprise Pioneer Park, North Industrial City, Songshanhu high tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: Guangdong Dapu Telecom Technology Co.,Ltd. |