CN219996123U - Tuning fork crystal oscillator groove depth measuring equipment - Google Patents

Tuning fork crystal oscillator groove depth measuring equipment Download PDF

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Publication number
CN219996123U
CN219996123U CN202321271786.1U CN202321271786U CN219996123U CN 219996123 U CN219996123 U CN 219996123U CN 202321271786 U CN202321271786 U CN 202321271786U CN 219996123 U CN219996123 U CN 219996123U
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China
Prior art keywords
measuring
tuning fork
cutting
fork crystal
sliding
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CN202321271786.1U
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Chinese (zh)
Inventor
董书霞
汪鑫
丁一奇
徐茂东
罗枭天
王磊
束鑫
余天翔
朱子文
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Hefei Jingweite Electronics Co ltd
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Hefei Jingweite Electronics Co ltd
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Abstract

The utility model discloses a tuning fork crystal oscillator groove depth measuring device which comprises a workbench, wherein at least two station grooves for vertically positioning and placing a tuning fork crystal oscillator are formed in the top of the workbench, the measuring device further comprises a cutting assembly for cutting the tuning fork crystal oscillator in the horizontal direction and a measuring assembly for measuring a fracture of the tuning fork crystal oscillator in the vertical direction, the cutting end of the cutting assembly and the measuring end of the measuring assembly synchronously move along the distribution track of the station grooves, and the cutting end of the cutting assembly is positioned on the front side of the moving path of the measuring end of the measuring assembly. According to the utility model, a plurality of tuning fork crystal oscillators are vertically positioned and placed in the station groove, the tuning fork crystal oscillators are firstly cut along the horizontal direction through the cutting end of the cutting assembly, the cut of the cross section of the tuning fork crystal oscillators is ensured to be smooth, and then the groove depth of the cross section of the tuning fork crystal oscillators is directly measured through the measuring end of the measuring assembly, so that the cutting and the measurement of the plurality of tuning fork crystal oscillators are continuously carried out, and the precision and the efficiency of the measurement operation of the tuning fork crystal oscillators are effectively improved.

Description

Tuning fork crystal oscillator groove depth measuring equipment
Technical Field
The utility model relates to the technical field of measuring equipment, in particular to tuning fork crystal oscillator groove depth measuring equipment.
Background
The tuning fork crystal oscillator refers to a crystal oscillator with a quartz wafer similar to a tuning fork in appearance, and the application fields comprise clocks and watches, watch cores, mobile phones, tablet computers, microcomputers, calculators, automatic control of household appliances, automatic control of industry and the like.
In practical production, the cross-section groove depth a of the tuning fork crystal oscillator shown in fig. 3 is often required to be measured. When the section groove depth a of the traditional tuning fork crystal oscillator is measured, the tuning fork crystal oscillator is broken off by manpower, and then the section groove depth a of the tuning fork crystal oscillator is measured by means of a measuring tool. On the one hand, in the manual breaking process, the cross section incision of the tuning fork crystal oscillator is often uneven, so that errors exist in the measuring process of the cross section groove depth a of the tuning fork crystal oscillator; on the other hand, when the section groove depth a of the tuning fork crystal oscillator is measured, after the tuning fork crystal oscillator is manually broken off, the tuning fork crystal oscillator is placed on a station corresponding to a measuring tool for measurement, and when the number of the tuning fork crystal oscillators to be measured is large, the problem of low measuring operation efficiency is obviously solved.
Disclosure of Invention
The utility model aims at: in order to solve the problems, the device for measuring the groove depth of the tuning fork crystal oscillator can smoothly cut off the tuning fork crystal oscillator, can continuously cut off and measure the tuning fork crystal oscillator, and realizes high-precision and high-efficiency measurement.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a tuning fork crystal oscillator groove depth measuring equipment, includes the workstation, the top of workstation has at least two station grooves that are used for vertical location to place tuning fork crystal oscillator, and this measuring equipment still includes along the cutting subassembly of horizontal direction cutting tuning fork crystal oscillator and along the measuring subassembly of plumb direction measurement tuning fork crystal oscillator, the cutting end of cutting subassembly with the measuring end of measuring subassembly is along station groove distribution track synchronous movement, and the cutting end of cutting subassembly is located the travel path front side of the measuring end of measuring subassembly.
As a further description of the above technical solution:
the cutting end of cutting assembly and the measuring end of measuring assembly pass through movable assembly and workstation swing joint, be provided with on the movable assembly and be used for measuring assembly's measuring end and the locating component of different station grooves alignment respectively, locating component includes the locating piece with movable assembly elastic connection, have on the workstation with different station grooves correspond at least two constant head tanks respectively, the locating piece elastic sliding extrudees to different constant head tanks in, in order to with measuring assembly's measuring end and different station grooves alignment respectively.
As a further description of the above technical solution:
the positioning groove is of a V-shaped structure, the positioning block is of a straight triangular prism structure with a vertex angle attached to the tip of a groove cavity of the positioning groove, and the positioning block elastically slides towards the inner side of the station groove along the direction of a perpendicular bisector of the bottom edge of the positioning block.
As a further description of the above technical solution:
the station grooves are linearly distributed at intervals, the top of the workbench is provided with sliding grooves with the groove length direction parallel to the linear distribution direction of the station grooves, and the movable assembly is in sliding connection with the workbench through the sliding grooves.
As a further description of the above technical solution:
the movable assembly comprises a sliding transverse plate sliding in the inner cavity of the horizontal section of the chute and a sliding vertical plate sliding in the inner cavity of the vertical section of the chute, a gap is reserved between the sliding vertical plate and the inner cavity of the vertical section of the chute, the sliding transverse plate slides in the inner cavity of the horizontal section of the chute through a roller bracket, and rollers which are abutted to the inner cavities of the horizontal section of the chute are arranged at the top, the side wall and the bottom of the sliding transverse plate.
As a further description of the above technical solution:
the bottom edge of the positioning block is vertically fixed with a positioning slide bar penetrating through the sliding vertical plate, and an extrusion spring is sleeved on a bar body of the positioning slide bar between the sliding vertical plate and the positioning slide bar.
As a further description of the above technical solution:
the cutting assembly comprises an optical fiber laser fixedly connected with a workbench, a laser cutting probe of the optical fiber laser is horizontally fixed on a sliding vertical plate, and a laser emitting end emitted by the laser cutting probe along the horizontal direction is a cutting end of the cutting assembly.
As a further description of the above technical solution:
the measuring assembly comprises a visual detection host fixedly connected with the workbench, a visual detection probe of the visual detection host is vertically fixed on the sliding vertical plate, and a visual acquisition end acquired by the visual detection probe along the vertical direction is a measuring end of the measuring assembly.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
1. the tuning fork crystal oscillator is vertically positioned in the station groove, and the cutting end of the cutting assembly and the measuring end of the measuring assembly synchronously move, so that the cutting end of the cutting assembly is positioned at the front side of the moving path of the measuring end of the measuring assembly, and the tuning fork crystal oscillator is firstly cut along the horizontal direction through the cutting end of the cutting assembly, so that the leveling of the cut of the cross section of the tuning fork crystal oscillator is ensured; after the tuning fork crystal oscillator is cut off, the groove depth of the cross section of the tuning fork crystal oscillator is measured directly through the measuring end of the measuring assembly, so that the tuning fork crystal oscillator is cut and measured continuously, and the precision and the efficiency of the tuning fork crystal oscillator measuring operation are effectively improved. And through setting up two at least station grooves in workstation top, still can realize the continuous measurement operation of a plurality of tuning fork crystal oscillator, further promoted the work efficiency of tuning fork crystal oscillator measurement operation.
2. The cutting end of the cutting assembly and the measuring end of the measuring assembly are movably connected with the workbench through the movable assembly, the movable assembly is provided with the positioning assemblies for respectively aligning the measuring end of the measuring assembly with different working grooves, and after the tuning fork crystal oscillator is cut off by the cutting end of the cutting assembly, the measuring end of the measuring assembly and the different working position grooves are respectively aligned by elastically extruding the positioning blocks in the positioning assemblies to the different positioning grooves of the workbench, so that the measuring accuracy of the measuring end of the measuring assembly to the tuning fork crystal oscillator is ensured.
3. The positioning groove is arranged into a V-shaped structure, and the positioning block is arranged into a straight triangular prism structure with the vertex angle attached to the tip of the groove cavity of the positioning groove. When the positioning block is positioned in the range of the groove cavity of the positioning groove, the positioning block elastically slides towards the working groove along the direction of the perpendicular bisector of the bottom edge of the positioning block, and if the top angle of the positioning block is not aligned with the tip of the groove cavity of the positioning groove, the positioning block is attached to the bevel edge of the groove cavity of the positioning groove, and at the moment, the positioning block has a movement trend of sliding along the bevel edge of the groove cavity of the positioning groove; when the motion potential energy is larger than the sliding acting force of the driving movable assembly, the positioning block can slide along the inclined edge of the groove cavity of the positioning groove, and the vertex angle of the straight positioning block is attached to the tip of the groove cavity of the positioning groove, so that the driving movable assembly is automatically driven to adjust and position. Therefore, when the movable assembly moves, the movable assembly does not need to be precisely moved to a required position, and the movable assembly can be automatically adjusted only by moving the movable assembly until the top angle of the positioning block is positioned in the range of the groove cavity of the positioning groove, so that the convenience of measuring operation of the tuning fork crystal oscillator is improved.
4. The station grooves are linearly distributed at intervals, the movable assembly slides along the grooves parallel to the distribution direction of the station grooves, so that the movable assembly drives the cutting end of the cutting assembly and the measuring end of the measuring assembly to synchronously move along the distribution track of the station grooves, and the linear distribution mode is adopted, so that the tuning fork crystal oscillator is convenient and fast to arrange in the station grooves, and the movable assembly slides conveniently and rapidly.
5. The sliding groove is arranged into an inverted T-shaped structure, and the movable assembly comprises a sliding transverse plate sliding in the inner cavity of the horizontal section of the sliding groove and a sliding vertical plate sliding in the inner cavity of the vertical section of the sliding groove, so that the movable assembly can stably slide along the length direction of the sliding groove. And the sliding transverse plate slides in the inner cavity of the horizontal section of the chute through the roller bracket, and the sliding vertical plate and the inner cavity of the vertical section of the chute are provided with gaps, so that rolling friction between the movable assembly and the chute is caused, and the sliding resistance of the movable assembly is reduced.
6. The positioning slide rod is used for supporting the positioning block to stably slide along the length direction of the positioning slide rod, the extrusion spring is sleeved outside the positioning slide rod to generate elastic extrusion force on the positioning block, and the positioning block is ensured to slide into the positioning groove to accurately position the sliding vertical plate.
7. The tuning fork crystal oscillator horizontal laser cutting mode of the laser cutting probe of the fiber laser can effectively ensure the refinement of the notch, and the effect of cutting the tuning fork crystal oscillator is improved.
8. The mode of vertical visual measurement of the notch of the tuning fork crystal oscillator by the visual detection probe of the visual detection host can effectively reduce manual measurement errors and improve measurement accuracy.
Drawings
Fig. 1 shows a schematic perspective view of a tuning fork crystal oscillator according to an embodiment of the present utility model;
FIG. 2 shows a schematic diagram of a front view structure of a tuning fork crystal oscillator according to an embodiment of the present utility model;
FIG. 3 shows a schematic cross-sectional view of the structure shown in A-A of FIG. 2;
fig. 4 shows a schematic perspective view of the present utility model;
FIG. 5 shows a partially enlarged schematic construction of FIG. 4 at B;
FIG. 6 shows a schematic elevational view of the present utility model;
fig. 7 is a schematic top view of a workbench according to an embodiment of the utility model;
legend description:
cross-sectional groove depth a
10. Tuning fork crystal oscillator; 20. a work table; 21. a station groove; 22. a chute; 23. a positioning groove; 30. a vision inspection host; 31. a visual inspection probe; 40. a fiber laser; 41. a laser cutting probe; 50. a movable assembly; 51. sliding the cross plate; 52. sliding risers; 53. a roller; 61. a positioning block; 62. positioning a slide bar; 63. the spring is pressed.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
For ease of understanding, the specific structure and operation of the utility model will be further described herein with reference to the accompanying drawings:
the specific structure of the utility model is shown with reference to fig. 4-7, and the main structure comprises a workbench 20, at least two station slots 21 on the workbench 20, a cutting assembly and a measuring assembly. The station grooves 21 are used for vertically positioning and placing the tuning fork crystal oscillator 10, and the arrangement of at least two station grooves 21 can realize the cutting and measurement of at least two tuning fork crystal oscillators 10; after the tuning fork crystal oscillator 10 is vertically positioned and placed in the station groove 21, the cutting end of the cutting assembly cuts the tuning fork crystal oscillator 10 along the horizontal direction so as to ensure that the section incision of the tuning fork crystal oscillator 10 is smooth; after the tuning fork crystal oscillator 10 is flattened and cut off, the fracture of the tuning fork crystal oscillator 10 is measured along the plumb direction through the measuring end of the measuring assembly, so that the accuracy of a measuring structure can be ensured. Further, in the utility model, the cutting end of the cutting assembly and the measuring end of the measuring assembly move synchronously along the distribution track of the station slot 21, and the cutting end of the cutting assembly is positioned at the front side of the moving path of the measuring end of the measuring assembly; by synchronously moving the cutting end of the cutting assembly and the measuring end of the measuring assembly, the tuning fork crystal oscillator 10 is firstly cut by moving the cutting assembly, and then the tuning fork crystal oscillator 10 after being cut off by the measuring end of the measuring assembly can be immediately used, so that the continuity between cutting and measuring operations is ensured. And the cutting end of the cutting assembly and the measuring end of the measuring assembly synchronously move along the distribution track of the station groove 21, so that continuous cutting and measuring operation of a plurality of tuning fork crystal oscillators 10 can be realized, and the efficiency of measuring operation of the tuning fork crystal oscillators 10 is improved. Still further, in the present utility model, the distribution of the station grooves 21 is preferably a linear distribution or an annular distribution. When the station grooves 21 are linearly distributed, the cutting ends of the cutting assemblies and the measuring ends of the measuring assemblies slide along the linear track to realize synchronous movement with the distribution track of the station grooves 21; when the station grooves 21 are distributed in an annular mode, the cutting ends of the cutting assemblies and the measuring ends of the measuring assemblies rotate around the circle centers of the annular distribution of the station grooves 21, and synchronous movement with the distribution track of the station grooves 21 can be achieved.
On the basis of the above, as shown in fig. 4 and 5, the cutting end of the cutting assembly and the measuring end of the measuring assembly are movably connected with the workbench 20 through the movable assembly 50, and a positioning assembly is arranged between the movable assembly 50 and the workbench 20 to align the measuring end of the measuring assembly with the station slot 21, so that the measuring assembly can stably and accurately measure the tuning fork crystal oscillator 10.
Further, the positioning assembly comprises a positioning block 61 elastically connected with the movable assembly 50, and the measuring end of the measuring assembly is respectively aligned with the different station grooves 21 by elastically extruding the positioning block 61 into the different positioning grooves 23; the elastic extrusion enables the positioning block 61 to be matched with the positioning groove 23 to achieve the positioning mode, the positioning block 61 can automatically slide to the positioning groove 23 to complete positioning under the elastic operation, the positioning mode is convenient and efficient, and the positioning block 61 and the positioning groove 23 can be separated by overcoming the elastic sliding positioning block 61, so that the positioning and positioning releasing processes are convenient and efficient.
Furthermore, the positioning groove 23 has a V-shaped structure, the positioning block 61 has a straight triangular prism structure, and the top angle of the positioning block 61 is matched and attached with the tip of the groove cavity of the positioning groove 23. The positioning block 61 is pushed by overcoming the elastic force received by the positioning block 61, so that the positioning block 61 is not abutted against the workbench 20, and the positioning block 61 is not rubbed with the workbench 20 in the moving process of the movable assembly 50 at the moment, so that the moving convenience of the movable assembly 50 is improved. At this time, when the vertex angle of the positioning block 61 is located in the range of the groove cavity of the positioning groove 23, the vertex angle of the positioning block 61 elastically slides towards the direction of the positioning groove 23, and the vertex angle of the positioning block 61 is extruded to be abutted against the groove cavity bevel edge of the positioning groove 23, and because the vertex angle of the positioning block 61 does not slide to the tip of the groove cavity of the positioning groove 23 at this time, the positioning block 61 generates a movement trend of sliding along the groove cavity bevel edge of the positioning groove 23 under elastic extrusion; therefore, when the moving resistance of the movable assembly 50 is smaller, the positioning block 61 slides along the inclined edge of the groove cavity of the positioning groove 23 under elastic extrusion until the vertex angle of the positioning block 61 is attached to the tip of the groove cavity of the positioning groove 23, so that the movable assembly 50 is driven to slide synchronously, and the elastic automatic driving of the movable assembly 50 to adjust to a required position is realized. Therefore, when the movable assembly 50 moves, the movable assembly 50 does not need to be precisely moved to a required position, and the movable assembly 50 can be automatically adjusted only by moving the movable assembly 50 until the top angle of the positioning block 61 is positioned in the groove cavity range of the positioning groove 23, so that the convenience of the measurement operation of the tuning fork crystal oscillator 10 is improved.
On the basis of the above, as shown in fig. 4 and 6, the station slots 21 are preferably linearly spaced apart, and at the same time, the movable assembly 50 slides along the slot length direction along the slide slots 22 parallel to the distribution direction of the station slots 21, so as to realize synchronous movement of the cutting end of the cutting assembly and the measuring end of the measuring assembly of the movable assembly 50 along the distribution track of the station slots 21. Further, the chute 22 has an inverted T-shaped structure, and the movable assembly 50 includes a sliding cross plate 51 sliding in the horizontal section cavity of the chute 22 and a sliding vertical plate 52 sliding in the vertical section cavity of the chute 22, thereby keeping the movable assembly 50 stably sliding in the chute 22. The sliding cross plate 51 slides in the inner cavity of the horizontal section of the sliding chute 22 through the bracket type of the roller 53 through the clearance between the sliding vertical plate 52 and the vertical section of the sliding chute 22, so that the friction force between the movable assembly 50 and the inner cavity of the sliding chute 22 is the rolling friction between the roller 53 and the inner cavity of the sliding chute 22, and the friction force in the sliding process of the movable assembly 50 is effectively reduced.
On the basis of the above, as shown in fig. 4 and 6, the positioning block 61 realizes sliding support by observing the positioning slide bar 62 of the sliding riser 52, and elastic extrusion force is provided by the extrusion spring 63 sleeved outside the positioning slide bar 62, so that the positioning block 61 and the sliding riser 52 can slide relatively along the stable linear direction, and further, the positioning block 61 is ensured to slide into the positioning groove 23 to accurately position the sliding riser 52.
On the basis of the above, as shown in fig. 4, the cutting assembly includes a fiber laser 40, and cutting of the tuning fork crystal 10 in the horizontal direction can be achieved by sliding a horizontally distributed laser cutting probe 41 of the fiber laser 40 along with a sliding riser 52. The tuning fork crystal oscillator 10 is cut by laser, so that the definition of the cut can be effectively ensured, and the cutting effect of the tuning fork crystal oscillator 10 is improved. The measuring assembly comprises a visual inspection host 30, and the cross-section groove depth of the tuning fork crystal oscillator 10 is measured along the vertical direction through a visual inspection probe 31 vertically distributed on the visual inspection host 30. The manual measurement error can be effectively reduced and the measurement precision can be improved by a visual detection measurement mode.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (8)

1. The utility model provides a tuning fork crystal oscillator groove depth measuring equipment, its characterized in that, includes workstation (20), the top of workstation (20) has at least two station grooves (21) that are used for vertical location to place tuning fork crystal oscillator (10), and this measuring equipment still includes along the cutting component of horizontal direction cutting tuning fork crystal oscillator (10) and along the measuring component of plumb direction measuring tuning fork crystal oscillator (10) fracture, the cutting end of cutting component with the measuring end of measuring component is along station groove (21) distribution orbit synchronous movement, and the cutting end of cutting component is located the travel path front side of the measuring end of measuring component.
2. The tuning fork crystal oscillator groove depth measuring device according to claim 1, wherein the cutting end of the cutting assembly and the measuring end of the measuring assembly are movably connected with the workbench (20) through a movable assembly (50), a positioning assembly used for respectively aligning the measuring end of the measuring assembly with different station grooves (21) is arranged on the movable assembly (50), the positioning assembly comprises a positioning block (61) elastically connected with the movable assembly (50), at least two positioning grooves (23) respectively corresponding to the different station grooves (21) are arranged on the workbench (20), and the positioning block (61) elastically slides and extrudes into the different positioning grooves (23) so as to respectively align the measuring end of the measuring assembly with the different station grooves (21).
3. The tuning fork crystal oscillator groove depth measuring device according to claim 2, wherein the positioning groove (23) is of a V-shaped structure, the positioning block (61) is of a straight triangular prism structure with a vertex angle attached to the tip of a groove cavity of the positioning groove (23), and the positioning block (61) elastically slides towards the inner side of the station groove (21) along the direction of a perpendicular bisector of the bottom edge of the positioning block.
4. A tuning fork crystal oscillator groove depth measuring device according to claim 2 or 3, wherein the station grooves (21) are linearly distributed at intervals, the top of the workbench (20) is provided with a sliding groove (22) with a groove length direction parallel to the linear distribution direction of the station grooves (21), and the movable assembly (50) is in sliding connection with the workbench (20) through the sliding groove (22).
5. The tuning fork crystal oscillator groove depth measuring device according to claim 4, wherein the sliding groove (22) is of an inverted T-shaped structure, the movable assembly (50) comprises a sliding transverse plate (51) sliding in a horizontal section inner cavity of the sliding groove (22) and a sliding vertical plate (52) sliding in a vertical section inner cavity of the sliding groove (22), a gap is reserved between the sliding vertical plate (52) and the vertical section inner cavity of the sliding groove (22), the sliding transverse plate (51) slides in the horizontal section inner cavity of the sliding groove (22) through a bracket of the roller (23), and the top, the side wall and the bottom of the sliding transverse plate (51) are provided with rollers (53) abutting against the horizontal section inner cavity of the sliding groove (22).
6. The tuning fork crystal oscillator groove depth measuring device according to claim 5, wherein a positioning slide rod (62) penetrating through the sliding vertical plate (52) is vertically fixed to the bottom edge of the positioning block (61), and an extrusion spring (63) is sleeved on a rod body of the positioning slide rod (62) located between the sliding vertical plate (52) and the positioning slide rod (62).
7. The tuning fork crystal oscillator groove depth measuring equipment according to claim 5, wherein the cutting assembly comprises a fiber laser (40) fixedly connected with a workbench (20), a laser cutting probe (41) of the fiber laser (40) is horizontally fixed on a sliding riser (52), and a laser emitting end of the laser cutting probe (41) emitting in a horizontal direction is a cutting end of the cutting assembly.
8. The tuning fork crystal oscillator groove depth measuring device according to claim 5, wherein the measuring assembly comprises a visual inspection host (30) fixedly connected with a workbench (20), a visual inspection probe (31) of the visual inspection host (30) is vertically fixed on a sliding vertical plate (52), and a visual collection end of the visual inspection probe (31) collected along the vertical direction is a measuring end of the measuring assembly.
CN202321271786.1U 2023-05-24 2023-05-24 Tuning fork crystal oscillator groove depth measuring equipment Active CN219996123U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321271786.1U CN219996123U (en) 2023-05-24 2023-05-24 Tuning fork crystal oscillator groove depth measuring equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321271786.1U CN219996123U (en) 2023-05-24 2023-05-24 Tuning fork crystal oscillator groove depth measuring equipment

Publications (1)

Publication Number Publication Date
CN219996123U true CN219996123U (en) 2023-11-10

Family

ID=88613543

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321271786.1U Active CN219996123U (en) 2023-05-24 2023-05-24 Tuning fork crystal oscillator groove depth measuring equipment

Country Status (1)

Country Link
CN (1) CN219996123U (en)

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