CN110319964B - Method and device for detecting clamping force of pen clip - Google Patents
Method and device for detecting clamping force of pen clip Download PDFInfo
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- CN110319964B CN110319964B CN201910702393.3A CN201910702393A CN110319964B CN 110319964 B CN110319964 B CN 110319964B CN 201910702393 A CN201910702393 A CN 201910702393A CN 110319964 B CN110319964 B CN 110319964B
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- pen clip
- pen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a method for detecting clamping force of a pen clip, which relates to the technical field of pen clip detection and comprises the following steps of S1, fixing a pen cap to be detected; s2, pulling the ball clamping position of the pen clip; s3, detecting the distance and the corresponding tension of the ball-clamping position of the pen clip, and recording the corresponding data; and S4, comparing the corresponding data with a preset standard value, wherein the closer the corresponding data are, the better the quality of the pen clip is. According to the invention, the quality of the pen clip is detected by positive pressure of the pen clip by detecting the distance and the corresponding tension at the position of the ball of the pen clip, so that the influence of friction on the detection result is eliminated; in addition, the ball clamping position of the pen clip is pulled to simulate the action of pulling the pen clip by a user, and the pressure of the pen clip is adjusted to ensure that the pen clip can be conveniently pulled by the user while clamping clothes, so that the use hand feeling of the pen clip is improved.
Description
Technical Field
The invention relates to the technical field of pen clip detection, in particular to a method and a device for detecting the clamping force of a pen clip.
Background
At present, most pens for writing use the pen clip as a special part to facilitate carrying and using. The clamping force of the pen clip is a general quality index representing the reliability and the applicability of the pen clip during clamping. The method for acquiring the clamping force of the pen clip mainly comprises two methods: one is supported by the spring force of a "clip spring", called a "spring clip", which achieves a firm and soft grip when in use. The body of the spring clip is under the compression tension of the spring leaf and the clamping force of the ball part generated by the reaction, so the strength of the body is important and it must bear certain force without bending deformation. The other is an elastic clip which depends on the elasticity of the pen clip and is determined by the structural shape of the pen clip and the rigidity of raw materials. The elastic clamp has more factors influencing the clamping force, and the clamping force is determined by the elasticity and the hardness of raw materials, the stress of the impact bending process, the geometric shape of the clamp body and the like.
At present, most of domestic pen factories adopt a spring principle to measure: the pen cap is pulled out of the pen, placed on the instrument clamp reversely for fixing, a metal insert (60X 12X 0.8 mm) is inserted between the pen cap and the ball clamp by 10mm, and the upper end of the insert is connected with a spring scale. When the motor is started, the spring scale pulls the inserting sheet to slide upwards until the inserting sheet is separated from the pen clip, the value pointed by the pointer of the spring scale when the inserting sheet is separated from the ball clip of the pen clip is usually taken as a measured value, and then observed data are recorded.
In practice, the pen clip is required to be repeatedly and frequently inserted and pulled out without affecting the fabric of the clothes to the maximum extent and obtaining good insertion and pulling hand feeling, so that the surface of the clip bead of the pen clip is required to be smooth, namely the friction coefficient is required to be controlled within a certain range. The clamping capability of the pen clip should be obtained mainly by the elastic restoring force (namely positive pressure) after the elastic deformation of the pen clip, but not by increasing the friction coefficient, such as changing the geometric shape of the clamping ball, making the clamping ball pointed, having edges and corners and drawing the surface of the clamping ball, reducing the smoothness degree of the clamping ball and the surface of the pen cap, and the like.
In the prior art, the insert sheet indirectly measures the clamping force in a dynamic mode, the clamping force is defined by sliding friction force, the clamping force is the product of positive pressure and friction coefficient, and is influenced by the roughness of a contact surface and the positive pressure, so that the quality of the pen clip measured by the sliding friction force is difficult to accurately and comprehensively reflect the quality of the pen clip.
Disclosure of Invention
Aiming at the problem of inaccurate quality detection of the pen clip in the prior art, the invention aims to provide a method for detecting the clamping force of the pen clip, which has the advantage of more accurate quality detection of the pen clip.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for detecting the clamping force of a pen clip comprises the following steps,
s1, fixing the pen cap to be detected;
s2, pulling the ball clamping position of the pen clip;
s3, detecting the distance and the corresponding tension of the ball-clamping position of the pen clip, and recording the corresponding data;
and S4, comparing the corresponding data with a preset standard value, wherein the closer the corresponding data are, the better the quality of the pen clip is.
By the technical scheme, in order to ensure that the clothes cannot be damaged in the process of taking the pen clip off the clothes, the clamping beads of the pen clip are necessarily made to be very smooth, so that the method for measuring the quality of the pen clip by adopting sliding friction is inaccurate. According to the invention, the quality of the pen clip is detected by positive pressure of the pen clip by detecting the distance and the corresponding tension at the position of the ball of the pen clip, so that the influence of friction on the detection result is eliminated; in addition, the ball clamping position of the pen clip is pulled to simulate the action of pulling the pen clip by a user, and the pressure of the pen clip is adjusted to ensure that the pen clip can be conveniently pulled by the user while clamping clothes, so that the use hand feeling of the pen clip is improved.
Further, in step S2, the ball-clamping position of the pen clip is pulled along the radial direction of the pen cap.
Through above-mentioned technical scheme, along the radial pulling pen clip of cap for brush, the pulling force of use is minimum, accords with the conventional reason of using, and the simulation is used the sight, ensures the degree of accuracy and the uniqueness of testing result.
Further, in step S3, the distance of the ball of the pen clip is less than 3.8 mm.
Through above-mentioned technical scheme, avoid haring the pen clip on the one hand, on the other hand, the pen clip draws apart the distance and is less than 3.8mm and more accords with normal use custom.
Further, in step S3, the pulling force for pulling the ball of the pen clip apart is less than 20N.
Through the technical scheme, if the pulling force required for pulling the pen clip is greater than 20N, the pen clip is difficult to pull, and the pen clip is directly judged to be a defective product and is not used as the category for detecting and acquiring data.
The utility model provides a detection apparatus for pen clip clamping force, includes the base, be provided with the fixture device who is used for fixed cap for brush on the base, it is connected with and is used for pulling the pen clip and detects corresponding tensile measuring force device to slide on the base, still be provided with the range unit who is used for detecting the pen clip and pulls open the displacement on the base.
Through the technical scheme, when the pen cap is used, the clamp device is firstly utilized to fix the pen cap, the tension for pulling the pen clip is obtained at the position of the ball clip for pulling the pen clip by the force measuring device, meanwhile, the distance measuring device detects the displacement for pulling the pen clip open, and the quality of the pen clip is judged according to the obtained displacement-tension data.
Further, the fixture device comprises a supporting rod fixed on one side of the base, a fixing block is connected to the supporting rod in a sliding and adjustable mode, and a clamping space used for clamping the pen cap is formed between the fixing block and the base.
Through above-mentioned technical scheme, utilize adjustable fixed block to fix the cap for brush in pressing from both sides tight space, the follow-up pulling pen clip of being convenient for detects.
Furthermore, a clamping opening used for penetrating the supporting rod is formed in the fixing block in a penetrating mode, and a twisting bolt used for contracting the clamping opening is connected to the fixing block in a threaded mode.
Through the technical scheme, the fixing block with the adjusted position is fixed on the supporting rod by utilizing the twisting bolt and contracting the clamping opening.
Furthermore, the fixed block is close to the side of base has seted up the indent arc groove, indent arc inslot wall is fixed with the buffer layer.
Through above-mentioned technical scheme, set up the indent arc groove, be convenient for rectify the position of fixed cap for brush, add the buffer layer, be convenient for compress tightly the cap for brush head of different shapes and size, avoid the cap for brush head scratch.
Furthermore, a positioning cone is arranged on the side surface of the base, close to the fixed block, in a position corresponding to the inner concave arc groove.
Through above-mentioned technical scheme, set up the coaxial fixed of the open end of the cap for brush of being convenient for of location awl, in addition, strengthened the suitability, be applicable to the cap for brush of not needing the bore.
Further, the positioning cone is rotatably connected to the base.
Through above-mentioned technical scheme, will fix a position the awl and rotate the setting, after pulling the pen clip, the pen cap can rotate by oneself, and the adjustment position is guaranteed to pull open the pen clip along the radial of pen cap.
Compared with the prior art, the invention has the beneficial effects that:
(1) the quality of the pen clip is detected by detecting the distance and the corresponding tension at the position where the ball of the pen clip is pulled open and detecting the positive pressure of the pen clip, so that the influence of friction on the detection result is eliminated, and the comprehensiveness of the quality detection of the pen clip is improved;
(2) the action of pulling the pen clip by a user is simulated by pulling the ball clamping position of the pen clip, and the pressure of the pen clip is adjusted to ensure that the pen clip can clamp clothes and can be pulled by the user conveniently, so that the use hand feeling of the pen clip is improved;
(3) furthermore, the positioning cone is arranged in a rotating mode, after the pen clip is pulled, the pen cap can rotate automatically, the position is adjusted, the pen clip is guaranteed to be pulled open along the radial direction of the pen cap, and the detection accuracy is improved.
Drawings
FIG. 1 is a block flow diagram of a detection method of the present invention;
FIG. 2 is a schematic view of the overall structure of the detecting unit of the present invention;
fig. 3 is a sectional view taken along line a-a of fig. 2.
Reference numerals: 1. a base; 2. a support bar; 3. a fixed block; 4. a clamping space; 5. clamping the opening; 6. twisting the bolt; 7. an inner concave arc groove; 8. a buffer layer; 9. positioning a cone; 10. a tension meter; 11. a displacement meter; 12. a screw; 13. a lifting seat; 14. and (4) hanging hooks.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following provides a detailed description of the present invention with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
A method for detecting the clamping force of a pen clip, as shown in figure 1, comprises the following steps,
s1, fixing the pen cap to be detected;
s2, pulling the ball-clamping position of the pen clip along the radial direction of the pen cap to simulate the action of pulling the pen clip open by a user;
s3, detecting the distance and the corresponding tension of the ball-clamping position of the pen clip, and recording the corresponding data;
in the detection process, the distance of the ball clamping position of the pen clip is less than 3.8mm, so that the pen clip is prevented from being damaged on one hand, and on the other hand, the normal use habit is better met when the distance of the pen clip is less than 3.8 mm; meanwhile, the pulling force for pulling the ball clamping part of the pen clip is less than 20N, if the pulling force required for pulling the pen clip is too large, the use habit of people is not met, and the pen clip is directly judged to be a bad product and is not used as the category for detecting and acquiring data.
And S4, comparing the corresponding data with a preset standard value, wherein the closer the corresponding data are, the better the quality of the pen clip is. The pen clip detection judgment standard is as follows: the pulling displacement of the pen clip is 1.5 mm, the closer the pulling force of the pen clip is to 12 newtons, the better the use hand feeling of the pen clip is, and therefore the quality of the pen clip can be comprehensively reflected and controlled.
A detection device for clamping force of a pen clip is disclosed, as shown in fig. 2 and fig. 3, and comprises an L-shaped base 1, wherein a clamp device used for fixing a pen cap is arranged on the base 1, a force measuring device used for pulling the pen clip and detecting corresponding tension is connected to the base 1 in a sliding mode along the length direction of the base 1, the force measuring device is a force measuring instrument, a hook 14 used for pulling the pen clip is arranged at the detection end of the force measuring instrument, a distance measuring device used for detecting the sliding distance of the force measuring device is further arranged on the base 1, the distance measuring device is a displacement instrument 11, the displacement instrument 11 is in the prior art, a lead screw on the displacement instrument 11 is connected with the tension instrument 10 in a transmission mode, and displacement data of the tension instrument 10 are detected while the tension instrument 10 is pulled to slide.
When the pen clip is used, the hook 14 is hooked on the upper side of a ball clip of the pen clip, the displacement meter 11 is rotated, the tension meter 10 is pulled to slide, when data on a force measurement display screen on the tension meter 10 just change, the rotation is stopped, and the data of the displacement meter 11 and the tension meter 10 are reset; and then, continuously rotating the displacement meter 11, pulling the tension meter 10 to slide, and recording a plurality of groups of displacement-tension data.
The fixture device is including being fixed in the bracing piece 2 of 1 one side of base, and adjustable sliding is connected with fixed block 3 on the bracing piece 2, runs through on the fixed block 3 and offers the mouth 5 that presss from both sides that is used for penetrating bracing piece 2, and threaded connection has the wrench movement bolt 6 that is used for the shrink to press from both sides mouth 5 on the fixed block 3, presss from both sides mouth 5 through rotating 6 shrink of wrench movement bolt to press from both sides the fixed block 3 clamp tightly and fix on bracing piece 2.
Fixed block 3 has been close to the side of base 1 and has been seted up interior concave arc groove 7, 7 inner walls in interior concave arc groove are fixed with buffer layer 8, buffer layer 8 is nylon or sheet rubber, base 1 is close to the side of fixed block 3 and is provided with location awl 9 in the position liftable adjustment that corresponds with interior concave arc groove 7, the one end that base 1 was kept away from to location awl 9 is most advanced, and simultaneously, location awl 9 rotates to be connected on base 1, forms the tight space 4 of clamp that is used for pressing from both sides tight cap of pen between fixed block 3 and the location awl 9. The side that base 1 is close to fixed block 3 is fixed with screw rod 12, threaded connection has lift seat 13 on the screw rod 12, the one end that base 1 was kept away from to lift seat 13 is cylindricly, the one end that location awl 9 is close to base 1 and the cylinder end plug-in connection of lift seat 13, twist and move lift seat 13 and adjust the height of location awl 9, because lift seat 13 and location awl 9 plug-in connection, location awl 9 can be for the coaxial rotation of lift seat 13, with this rotation of realizing the cap of a pen, ensure to pull open the pen clip along the cap of a pen's radial.
During detection, the opening of the pen cap is inserted into the tip end of the positioning cone 9, the fixing block 3 is lowered, the top end of the pen cap is located in the inner concave arc groove 7, the hook 14 is used for pulling the pen clip, then the pen cap can rotate in a small range, the position of the pen cap is adjusted, the hook 14 is ensured to pull the pen clip along the radial direction of the pen cap, and the detection precision is ensured; and finally, the fixing block 3 is adopted to compress the pen cap, the fixing block 3 is fixed by rotating the twisting bolt 6, and the pen cap is clamped between the fixing block 3 and the positioning cone 9.
In summary, the following steps:
when the pen clip is used, the quality of the pen clip is detected by detecting the distance and the corresponding tension at the position where the ball of the pen clip is pulled open and detecting the positive pressure of the pen clip, the influence of friction on a detection result is eliminated, and the comprehensiveness of the quality detection of the pen clip is improved; the action of pulling the pen clip by a user is simulated by pulling the ball clamping position of the pen clip, and the pressure of the pen clip is adjusted to ensure that the pen clip can clamp clothes and can be pulled by the user conveniently, so that the use hand feeling of the pen clip is improved; through rotating the setting of location awl 9, pulling the pen clip after, the pen cap can rotate by oneself, and the adjustment position ensures to pull open the pen clip along the radial of pen cap, improves the accuracy of detecting.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The method for detecting the clamping force of the pen clip is characterized in that a detection device for the clamping force of the pen clip is used for detecting, the detection device for the clamping force of the pen clip comprises a base (1), a clamp device for fixing a pen cap is arranged on the base (1), a force measuring device for pulling the pen clip and detecting corresponding pulling force is connected to the base (1) in a sliding mode, and a distance measuring device for detecting the pulling displacement of the pen clip is further arranged on the base (1); the clamp device comprises a supporting rod (2) fixed on one side of the base (1), a fixing block (3) is connected to the supporting rod (2) in an adjustable sliding mode, and a clamping space (4) for clamping a pen cap is formed between the fixing block (3) and the base (1);
the detection method comprises the following steps of,
s1, fixing the pen cap to be detected;
s2, pulling the ball clamping position of the pen clip along the radial direction of the pen cap;
s3, detecting the distance and the corresponding tension of the ball-clamping position of the pen clip, and recording the corresponding data;
and S4, comparing the corresponding data with a preset standard value, wherein the closer the corresponding data are, the better the quality of the pen clip is.
2. The method for detecting clamping force of a pen clip according to claim 1, wherein in step S3, the distance of the ball of the pen clip is less than 3.8 mm.
3. The method as claimed in claim 1, wherein in step S3, the pulling force for pulling the ball of the pen clip is less than 20N.
4. The device for detecting the clamping force of the pen clip is characterized by comprising a base (1), wherein a clamp device for fixing a pen cap is arranged on the base (1), a force measuring device for pulling the pen clip and detecting corresponding tension is connected to the base (1) in a sliding manner, and a distance measuring device for detecting the pulling displacement of the pen clip is further arranged on the base (1); the fixture device comprises a supporting rod (2) fixed on one side of a base (1), a fixing block (3) is connected to the supporting rod (2) in a sliding mode in an adjustable mode, and a clamping space (4) used for clamping a pen cap is formed between the fixing block (3) and the base (1).
5. The device for detecting the clamping force of the pen clip according to claim 4, wherein a clamping opening (5) for penetrating the supporting rod (2) is formed in the fixing block (3) in a penetrating manner, and a twisting bolt (6) for contracting the clamping opening (5) is connected to the fixing block (3) in a threaded manner.
6. The device for detecting the clamping force of the pen clip according to claim 4, wherein an inner concave arc groove (7) is formed in the side surface, close to the base (1), of the fixing block (3), and a buffer layer (8) is fixed on the inner wall of the inner concave arc groove (7).
7. The device for detecting the clamping force of the pen clip according to claim 6, wherein a positioning cone (9) is arranged on the side surface of the base (1) close to the fixed block (3) at a position corresponding to the inner concave arc groove (7).
8. The device for detecting the clamping force of a pen clip as claimed in claim 7, characterized in that the positioning cone (9) is rotatably connected to the base (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910702393.3A CN110319964B (en) | 2019-07-31 | 2019-07-31 | Method and device for detecting clamping force of pen clip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910702393.3A CN110319964B (en) | 2019-07-31 | 2019-07-31 | Method and device for detecting clamping force of pen clip |
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| CN110319964A CN110319964A (en) | 2019-10-11 |
| CN110319964B true CN110319964B (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910702393.3A Active CN110319964B (en) | 2019-07-31 | 2019-07-31 | Method and device for detecting clamping force of pen clip |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112729806B (en) * | 2021-01-25 | 2023-04-07 | 南京市淑先科技有限公司 | Office supplies production is with cylindrical pen cover performance detection device |
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