Vernier caliper for measuring narrow slit
By designing the slope end depth ruler and limit plate structure on the vernier caliper, the problem of being unable to accurately measure narrow slots in the prior art is solved, and the precise measurement of narrow slots is achieved and easy to use.
Patent Information
- Application Number
- CN202422388090.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-29
AI Technical Summary
Existing vernier calipers cannot accurately measure extremely narrow grooves or slits because the inner jaws cannot be placed, resulting in inaccurate measurement results.
A depth ruler with a slope end is designed, with a slope inclination angle of 3-6°. It can be placed in a narrow slot with a removable limiting plate and metal positioning pins, and the observation distance can be enlarged by the inclination change, and measured with a digital display or a scale vernier.
It realizes accurate measurement of narrow slits, is easy to use and simple to make, and only requires processing the depth ruler based on traditional vernier calipers.
Smart Images
Figure CN223091170U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of measuring tools, and particularly relates to a vernier caliper for measuring narrow slots. Background Art
[0002] A vernier caliper is a commonly used measuring tool, which includes a main scale and a vernier scale that can slide on the main scale. The main scale is provided with external jaws and internal jaws, and the vernier scale is also provided with corresponding external jaws and internal jaws. The external jaws are used to measure the thickness of parts and the outer diameter of pipes, and the internal jaws are used to measure the width of slots and the inner diameter of pipes. At the same time, a depth gauge is also provided on the vernier scale. The existing external jaws and internal jaws have an arc-shaped edge on one side and a straight edge on the other side, and they have a certain width themselves, resulting in the inability of the internal jaws to be inserted into extremely narrow slots. The vernier caliper can only simply measure outside the slot, and the measurement result is not accurate enough. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a vernier caliper for measuring narrow slots with further expanded functions.
[0004] To achieve the above purpose, the utility model provides a vernier caliper for measuring narrow slots, which includes a main scale and a vernier scale sleeved on the main scale and slidable. The main scale is provided with an external jaw and an internal jaw, and the vernier scale is provided with an external jaw and an internal jaw at corresponding positions. The vernier scale is also provided with a depth gauge, and the depth gauge is parallel to the main scale. When the vernier scale moves, it drives the depth gauge to move. The end of the depth gauge protruding from the main scale is provided with a slope, and several first scale lines are arranged on the side of the slope. The drop between the first scale lines at both ends is 1-2 mm, and the narrowest position of the end of the depth gauge is 1 mm.
[0005] As an improvement of the above solution, the inclination angle of the slope at the end of the depth gauge is 3-6°.
[0006] As an improvement of the above solution, a limit plate is detachably arranged at the end of the main scale close to the first scale line. The bottom surface of the limit plate is flush with the end surface of the main scale, and the width of the bottom surface of the limit plate is greater than the width of the end surface of the main scale.
[0007] As an improvement of the above solution, at least two positioning pins are arranged at the end of the main scale. The limit plate is provided with round holes that can be inserted into the positioning pins. The limit plate is snapped into the main scale by interference fit. The main scale, the external jaw, the internal jaw and the positioning pins are all made of metal, and the limit plate is made of plastic.
[0008] As an improvement of the above solution, the vernier scale adopts a digital display vernier scale or a scale vernier scale.
[0009] The utility model has the following beneficial effects: the slope itself has a small width and can be placed in a narrow slit, and then, by utilizing the characteristic of slow change of the inclined plane, the observation distance of a 1-mm thickness can be magnified; when using a vernier caliper, the end of the depth gauge can be inserted into the narrow slit, which is convenient to use. This solution only needs to process the depth gauge on the basis of a traditional vernier caliper, and it is convenient to manufacture. Description of the Drawings
[0010] Figure 1 is a three-dimensional view of a vernier caliper in an embodiment;
[0011] Figure 2 is a partial enlargement of a vernier caliper in an embodiment.
[0012] Description of the reference numerals: 11, body of the caliper; 12, vernier scale; 21, outer jaws; 22, inner jaws; 23, depth gauge; 30, first scale line; 41, positioning pin; 42, limiting plate. Detailed Description of the Preferred Embodiment
[0013] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top part", "bottom part", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
[0014] In the description of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there are descriptions of the terms "first", "second", "third", etc., they are only for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.
[0015] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The following will describe the embodiments according to the overall structure of the present utility model.
[0016] Referring to Figure 1 and Figure 2 , the present utility model discloses a vernier caliper for measuring narrow slits, which includes a main scale 11 and a vernier scale 12 sleeved on the main scale 11 and slidable thereon. The main scale 11 is provided with an external jaw 21 and an internal jaw 22. The vernier scale 12 is provided with an external jaw 21 and an internal jaw 22 at corresponding positions. The vernier scale 12 is further provided with a depth gauge 23. Other structures of the vernier caliper can refer to the prior art. The depth gauge 23 is parallel to the main scale 11. When the vernier scale 12 moves, it drives the depth gauge 23 to move. The end of the depth gauge 23 protruding from the main scale 11 is provided with a slope, and several first scale lines 30 are arranged on the side surface of the slope. The drop between the first scale lines 30 at both ends is 1 mm, and the narrowest position of the end of the depth gauge 23 is 1-2 mm. As Figure 2 shown, the width of the right end of the depth gauge 23 is 0.7 mm. The right starting point of the first scale line 30 is slightly shifted to the left and is located at the 1 mm width of the slope. The left end point of the first scale line 30 corresponds to the 2 mm width of the slope. The length of the entire slope is about 12 mm. For wider grooves, since the end of the internal caliper can already be inserted, it is no longer necessary to use the depth gauge 23.
[0017] As an improvement of the above solution, the inclination angle of the slope at the end of the depth gauge 23 is 3-6°. The smaller the inclination angle, the wider the distance between adjacent two scale lines, the easier it is to observe, and the higher the accuracy can be improved.
[0018] As an improvement of the above solution, the first scale line 30 is laser engraved on the surface of the depth gauge 23.
[0019] As an improvement of the above solution, a limiting plate 42 is detachably arranged at the end of the main scale 11 close to the first scale line 30. The bottom surface of the limiting plate 42 is flush with the end surface of the main scale 11, and the width of the bottom surface of the limiting plate 42 is greater than the width of the end surface of the main scale 11. With the above solution, when using the depth gauge 23, it is beneficial for the limiting plate 42 to abut against the edge of a wider groove.
[0020] As an improvement of the above solution, at least two positioning pins 41 are provided at the end of the scale body 11, round holes that can be inserted into the positioning pins 41 are provided on the limiting plate 42, and the limiting plate 42 is snap-fitted into the scale body 11 by interference fit. If the limiting plate 42 is not required in the application scenario, the limiting plate 42 does not need to be installed, and the scale body 11 is still a slender linear structure. The scale body 11, the outer clamping jaw 21, the inner clamping jaw 22, and the positioning pins 41 are all made of metal, and the limiting plate 42 is made of plastic. By adopting the above solution, the knocking of the limiting plate 42 on the scale body 11 can be reduced.
[0021] As an improvement of the above solution, the vernier scale 12 adopts a digital display vernier scale 12 or a graduated vernier scale 12.
[0022] The slope itself has a small width and can be placed in a narrow slit. Then, by utilizing the characteristic of slow change of the inclined plane, the observation distance of a 1-mm thickness can be magnified. When using the vernier caliper, the end of the depth gauge 23 is inserted into the narrow slit, which is convenient to use. This solution only needs to machine the depth gauge 23 on the basis of a traditional vernier caliper, and the manufacturing is convenient.
[0023] The foregoing description of the specific exemplary embodiments of the present invention is for the purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.
Claims
1. A vernier caliper for measuring narrow slits, comprising a main scale and a vernier scale sleeved on the main scale and slidable thereon. The main scale is provided with an external jaw and an internal jaw, and the vernier scale is provided with an external jaw and an internal jaw at corresponding positions, characterized in that: The vernier caliper is further provided with a depth gauge, the depth gauge is parallel to the scale body, when the vernier caliper moves, it drives the depth gauge to move, the end of the depth gauge protruding from the scale body is provided with a slope, and several first scale lines are arranged on the side surface of the slope. The height difference between the first scale lines at the head and tail ends is 1 mm, and the narrowest position at the end of the depth gauge is 1-2 mm.
2. The vernier caliper for measuring narrow slits according to claim 1, characterized in that: The inclination angle of the slope at the end of the depth gauge is 3-6°.
3. The vernier caliper for measuring narrow slits according to claim 2, characterized in that: A limiting plate is detachably arranged at the end of the scale body close to the first scale line. The bottom surface of the limiting plate is flush with the end surface of the scale body, and the width of the bottom surface of the limiting plate is greater than the width of the end surface of the scale body.
4. The vernier caliper for measuring narrow slits according to claim 3, characterized in that: At least two positioning pins are arranged at the end of the scale body. The limiting plate is provided with round holes that can be inserted into the positioning pins. The limiting plate is snap-fitted into the scale body by interference fit. The scale body, the outer clamping jaw, the inner clamping jaw and the positioning pins are all made of metal, and the limiting plate is made of plastic.
5. The vernier caliper for measuring narrow slits according to claim 1, characterized in that: The vernier caliper adopts a digital display vernier caliper or a scale vernier caliper.