CN112791369B - Sports throwing measuring device - Google Patents
Sports throwing measuring device Download PDFInfo
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- CN112791369B CN112791369B CN202110329574.3A CN202110329574A CN112791369B CN 112791369 B CN112791369 B CN 112791369B CN 202110329574 A CN202110329574 A CN 202110329574A CN 112791369 B CN112791369 B CN 112791369B
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- measuring
- point positioning
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
- A63B71/0669—Score-keepers or score display devices
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B65/00—Implements for throwing ; Mechanical projectors, e.g. using spring force
- A63B65/06—Heavy throwing-balls, i.e. "medicine balls", shots, weights or stones for putting
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
- A63B2071/065—Visualisation of specific exercise parameters
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2244/00—Sports without balls
- A63B2244/14—Shot putting
Abstract
The invention discloses a sports throwing measuring device, and relates to the technical field of measuring devices. The invention comprises a throwing area, a resisting plate, a fan-shaped landing area and a landing point positioning assembly; the abutting plate is tangent with the peripheral side surface of the throwing area; the surface of the abutting plate is provided with a limit channel; a threaded hole is formed in one side surface of the abutting plate; the throwing area is provided with a circle center groove; one side of the abutting plate is fixedly connected with a point positioning component; the surface of the intersection point positioning component is sequentially provided with a controller and a display; the intersection point positioning component is matched with a measuring tape in a rotating way; one end of the measuring tape is fixedly connected with a sliding sleeve; the sliding sleeve is in sliding fit with a support frame. According to the invention, the distance between the intersection point and the circular groove is measured by the measuring tape instead of measuring the distance between the shot landing point and the intersection point, namely, the short distance is measured instead of the long distance, so that the phenomenon that the measuring tape is folded or pulled out of straight due to long-distance measurement is avoided in the measuring process, and a larger measuring error is generated; the accuracy of measurement is improved.
Description
Technical Field
The invention belongs to the technical field of measuring devices, and particularly relates to a sports throwing measuring device.
Background
Sports, which is a complex social culture phenomenon, takes physical and intellectual activities as basic means, and achieves conscious, purposeful and organized social activities of promoting overall development, improving physical quality and overall education level, enhancing physical fitness and athletic ability, improving life style and improving life quality according to laws such as human growth and development, skill formation, function improvement and the like; a wooden support plate is placed right in front of the shot throwing ring and is 1.21-1.23 meters long, and the wooden support plate is used for preventing a player from sliding out of the shot throwing ring. The athlete can touch the inner side of the resisting board but can not touch the top of the resisting board; in competition, the landing areas are flat areas made of coal cinder, grass or other marking substances. Each sector is separated by a 5 cm wide white line and in the shot match the landing zone sector angle was changed from 40 degrees before to 34.92 degrees in 2003.
Firstly, determining a trace which is left on the ground and is closest to a resisting plate by the shot falling to the ground;
measuring requirements with a tape measure:
1. the ruler passes through the center of the throwing area.
2. The initial position of the ruler is the trace which is left nearest to the resisting plate when the shot falls to the ground, and then the numerical value which passes through the center of the throwing area and is intersected with the inner edge of the resisting plate is the required distance (score).
However, in the measuring method, the staff needs to run the pull rule back and forth to position and measure, so that a large amount of time is consumed, and the competition process is influenced; when the tape measure is used for measuring a long distance, the tape is troublesome to pull and is easy to turn over, and the tape is difficult to ensure to be straightened, so that the accuracy of the measured value is influenced.
Disclosure of Invention
The invention aims to provide a sports throwing measuring device, which is characterized in that a support frame is fixed in a throwing area, a telescopic adjusting rod is adjusted to be inserted in the circle center of a circle center groove, a positioning frame on a drop point positioning assembly and a supporting plate are arranged in parallel and inserted in the circle center of a first shot place, a servo motor is started to drive a cross point positioning assembly to pull a measuring tape to move together, an infrared limiter is blocked by a light shielding plate when moving to the cross point, a control box controls the servo motor to stop rotating, the numerical value of the measuring tape is observed and input into a display, and the throwing distance is calculated and directly displayed on the display through a triangle similarity principle, so that the existing problems are solved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a sports throwing measuring device, which comprises a throwing area, a resisting plate, a fan-shaped landing area and a drop point positioning assembly, wherein the throwing area is arranged on the throwing area; the abutting plate is tangent to the peripheral side surface of the throwing area; the surface of the abutting plate is provided with a limiting channel; a threaded hole is formed in one side face of the abutting plate; the throwing area is provided with a circle center groove;
one side of the abutting plate is fixedly connected with a point positioning component; the surface of the intersection point positioning component is sequentially provided with a controller and a display; the intersection point positioning assembly is matched with a measuring tape in a rotating mode; one end of the measuring tape is fixedly connected with a sliding sleeve; the sliding sleeve is in sliding fit with a support frame;
the intersection point positioning component comprises a fixing plate; one side surface of the fixed plate is fixedly connected with angle steel; the surface of the fixed plate is sequentially provided with a first sliding channel and a second sliding channel; the other side surface of the fixed plate is fixedly connected with a gear rack;
a sliding plate is in sliding fit between the angle steel and the fixed plate; the bottom of the sliding plate is fixedly connected with a first sliding rail; the other side surface of the sliding plate is fixedly connected with a supporting plate; an infrared limiter is fixedly connected to one side, close to the sliding plate, of the surface of the supporting plate; a servo motor is fixedly connected to the surface of the sliding plate far away from the infrared limiter; the output end of the servo motor is fixedly connected with a rotating gear; the rotating gear is meshed with the gear strip and is in rotating fit with the gear strip;
the surface of the supporting plate is fixedly connected with a mounting rack; the side surface of the mounting rack is fixedly connected with an L-shaped connecting rod; one end of the L-shaped connecting rod is fixedly connected with a sliding block; the sliding block is in sliding fit with the limiting channel;
a limiting clamping plate is fixedly connected to the peripheral side surface of the L-shaped connecting rod close to one end; extrusion springs are symmetrically and fixedly connected to two sides of the inner wall of the limiting clamping plate; one end of the extrusion spring is fixedly connected with an extrusion plate; the peripheral side surface of the L-shaped connecting rod is fixedly connected with a connecting column; the connecting column is matched with the measuring tape in a rotating way;
the support frame comprises a support rod; one end of the supporting rod is fixedly connected with a telescopic adjusting rod; the telescopic adjusting rod is in sliding fit with the sliding sleeve; the bottom end of the telescopic adjusting rod is fixedly connected with a first plug pin;
the drop point positioning assembly comprises a supporting bottom plate; the side surface of the supporting bottom plate is fixedly connected with a positioning frame; the bottom of the supporting bottom plate is fixedly connected with a second plug pin; and the surface of the supporting bottom plate is fixedly connected with a light screen.
Furthermore, one end of the gear strip is fixedly connected with a connecting plate; fastening bolts are rotatably matched with the threads on the side surface of the connecting plate; and the fastening bolt is in threaded rotation fit with the threaded hole.
Further, the bottom of the supporting plate is fixedly connected with a second sliding rail; the first sliding rail is in sliding fit with the first sliding channel; and the second slide rail is in sliding fit with the second slide channel.
The invention has the following beneficial effects:
1. according to the shot-put positioning device, the supporting frame is fixed in the throwing area, the telescopic adjusting rod is adjusted to be inserted in the circle center of the circle center groove, the positioning frame on the drop point positioning assembly and the abutting plate are placed in parallel and inserted in the circle center of the first shot-put point, the servo motor is started to drive the intersection point positioning assembly to pull the measuring tape to move together, the measuring tape is stopped by the light shielding plate when the infrared limiter moves to the intersection point, the control box controls the servo motor to stop rotating, the numerical value of the measuring tape is observed and input into the display, the throwing distance is calculated through a triangle similarity principle, and the throwing distance is directly displayed on the display; the device has a simple structure, saves the measuring step of pulling the ruler back and forth by the staff, saves the measuring time and avoids influencing the competition progress.
2. According to the invention, the distance between the intersection point and the circular groove is measured by the measuring tape instead of measuring the distance between the shot landing point and the intersection point, namely, the short distance is measured instead of the long distance, so that the phenomenon that the measuring tape is turned over or pulled out of straight due to the long distance is avoided in the measuring process, and a larger measuring error is caused; the accuracy of measurement is improved.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a sports pitch measuring device of the present invention;
FIG. 2 is a schematic view of the throwing zone of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A of FIG. 2 according to the present invention;
FIG. 4 is a schematic structural diagram of a landing point positioning assembly of the present invention;
FIG. 5 is a schematic structural diagram of a cross point positioning assembly according to the present invention;
FIG. 6 is a schematic structural diagram of the support frame of the present invention;
FIG. 7 is a schematic view of the throw distance measurement principle of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-throwing area, 2-resisting plate, 3-fan-shaped landing area, 4-falling point positioning component, 5-intersection point positioning component, 6-controller, 7-display, 8-measuring tape, 9-supporting frame, 101-circle center groove, 201-limiting channel, 202-threaded hole, 401-supporting bottom plate, 402-positioning frame, 403-second inserted pin, 404-shading plate, 501-fixing plate, 502-angle steel, 503-first sliding channel, 504-second sliding channel, 505-gear strip, 506-connecting plate, 507-fastening bolt, 508-sliding plate, 509-first sliding rail, 510-supporting plate, 511-second sliding rail, 512-infrared limiter, 513-servo motor, 514-rotating gear, 515-a mounting frame, 516-an L-shaped connecting rod, 517-a sliding block, 518-a limiting clamping plate, 519-an extrusion spring, 520-an extrusion plate, 521-a connecting column, 801-a sliding sleeve, 901-a supporting rod, 902-a telescopic adjusting rod and 903-a first plug pin.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1-6, the present invention is a sports throwing measuring device, which includes a throwing area 1, a resisting board 2, a sector landing area 3 and a landing point positioning assembly 4; the abutting plate 2 is tangent with the peripheral side surface of the throwing area 1; the surface of the butt plate 2 is provided with a limit channel 201; a threaded hole 202 is formed in one side surface of the abutting plate 2; the throwing area 1 is provided with a circle center groove 101; one side surface of the butt plate 2 is fixedly connected with a cross point positioning component 5; the surface of the intersection point positioning component 5 is sequentially provided with a controller 6 and a display 7; the intersection point positioning component 5 is rotationally matched with a measuring tape 8; one end of the measuring tape 8 is fixedly connected with a sliding sleeve 801; the sliding sleeve 801 is in sliding fit with a support frame 9; the shot landing point is positioned by the landing point positioning component 4, the intersection point is positioned by the intersection point positioning component 5, the distance between the intersection point and the circle center groove 101 is measured by the measuring tape 8, and the throwing distance is calculated by the triangle similarity theorem.
Referring to fig. 1-3, the intersection positioning assembly 5 includes a fixing plate 501; one side of the fixing plate 501 is fixedly connected with an angle iron 502; a first sliding channel 503 and a second sliding channel 504 are sequentially formed on the surface of the fixing plate 501; the other side surface of the fixing plate 501 is fixedly connected with a gear rack 505; one end of the gear rack 505 is fixedly connected with a connecting plate 506; fastening bolts 507 are rotatably matched with the threads on the side surface of the connecting plate 506; the fastening bolt 507 is in threaded rotation fit with the threaded hole 202; the gear rack 505 is fixedly installed on one side surface of the resisting plate 2 through a fastening bolt 507, and the servo motor 513 is started to drive the rotation gear 514 to rotate, so that the intersection point positioning assembly 5 moves back and forth along the gear rack 505.
Referring to fig. 1 and 5, a sliding plate 508 is slidably fitted between the angle iron 502 and the fixed plate 501; the bottom of the sliding plate 508 is fixedly connected with a first sliding rail 509; the other side surface of the sliding plate 508 is fixedly connected with a supporting plate 510; the bottom of the supporting plate 510 is fixedly connected with a second slide rail 511; the first slide rail 509 is slidably engaged with the first slide channel 503; the second slide rail 511 is slidably engaged with the second slide channel 504; the sliding plate 508 can stably run on the fixed plate 501 due to the sliding fit between the sliding rails and the sliding channels.
Referring to fig. 3, 5 and 6, a mounting frame 515 is fixedly connected to the surface of the supporting plate 510; the side surface of the mounting frame 515 is fixedly connected with an L-shaped connecting rod 516; one end of the L-shaped connecting rod 516 is fixedly connected with a sliding block 517; the sliding block 517 is in sliding fit with the limiting groove 201; a limiting clamping plate 518 is fixedly connected to the peripheral side surface of the L-shaped connecting rod 516 near one end; extrusion springs 519 are symmetrically and fixedly connected to two sides of the inner wall of the limiting clamping plate 518; one end of the extrusion spring 519 is fixedly connected with an extrusion plate 520; the circumferential side surface of the L-shaped connecting rod 516 is fixedly connected with a connecting column 521; the connecting column 521 is matched with the measuring tape 8 in a rotating way; the intersection point positioning component 5 pulls the measuring tape 8 to move together in the moving process; the extrusion spring 519 drives the extrusion plate 520 to clamp and fix the measuring tape 8, so that the measuring tape 8 is collinear with the infrared limiter 512.
Referring to fig. 2 and 6, the supporting frame 9 includes a supporting rod 901; one end of the support bar 901 is fixedly connected with a telescopic adjusting rod 902; the telescopic adjusting rod 902 is in sliding fit with the sliding sleeve 801; the bottom end of the telescopic adjusting rod 902 is fixedly connected with a first plug pin 903; the supporting rod 901 is placed on the throwing area 1, the first plug pin 903 is inserted into the circle center groove 101 through adjusting the telescopic adjusting rod 902, and the first plug pin 903 is driven to be driven by adjusting the telescopic adjusting rod 902 to be nailed into the circle center groove 101.
Referring to fig. 2-5, a servo motor 513 is fixedly connected to the surface of the sliding plate 508 far from the infrared stopper 512; the output end of the servo motor 513 is fixedly connected with a rotating gear 514; the rotating gear 514 is meshed with the gear strip 505 for rotating fit; an infrared limiter 512 is fixedly connected to one side of the surface of the supporting plate 510 close to the sliding plate 508; the placement point locating assembly 4 comprises a support base plate 401; the peripheral side surface of the supporting bottom plate 401 is fixedly connected with a positioning frame 402; the bottom of the supporting bottom plate 401 is fixedly connected with a second inserting nail 403; a light shielding plate 404 is fixedly connected to the surface of the supporting base plate 401; the positioning frame 402 and the supporting plate 2 are placed in parallel, and the second inserting nail 403 is inserted into the center of a shot landing point on the fan-shaped landing area 3; the servo motor 513 is started to drive the rotating gear 514 to move on the gear strip 505, when the infrared laser emitted by the infrared stopper 512 is shielded by the light shielding plate 404 when the infrared laser moves to the intersection of the circle center of the throwing area 1 and the inner edge of the resisting plate 2, the controller 6 controls the servo motor 513 to stop working, and the distance between the intersection and the circle center groove 101 is obtained by observing the measuring tape 8.
Please refer to fig. 7, in which: l1 is the distance between the intersection point and the center slot 101; l2 is the distance from the top of the mask 404 to the surface of the sectored landing zone 3; l3 is the distance from the infrared stopper 512 to the ground; x is the distance (throwing distance) between the intersection point and the center of the shot landing point;
according to the triangle similarity theorem:
X=L1*L2/L3-L1。
the specific working principle of the invention is as follows:
the positioning frame 402 and the supporting plate 2 are placed in parallel, the second plug pin 403 is inserted into the center of a circle of a shot landing point on the fan-shaped landing area 3, the supporting rod 901 is placed on the throwing area 1, the first plug pin 903 is inserted into the circle center groove 101 by adjusting the telescopic adjusting rod 902, and the first plug pin 903 is driven to be driven into the circle center groove 101 by adjusting the telescopic adjusting rod 902; the gear rack 505 is fixedly arranged on one side surface of the resisting plate 2 through a fastening bolt 507, and the intersection point positioning component 5 moves on the gear rack 505, namely moves upwards in the resisting plate 2; the infrared position limiter 512 belongs to an infrared travel switch, and detects whether an object exists or not by utilizing the shading or reversing of the detected object to an infrared light beam through a synchronous loop, the detected object is not limited to metal and can detect non-metal objects, the product has small volume, high degree, long detection distance, corrosion resistance, light resistance and electromagnetic interference resistance, a servo motor 513 is started to drive a rotating gear 514 to move on a gear rack 505, when the product moves to an intersection point where the circle center of a throwing area 1 and the inner edge of a resisting plate 2 intersect, the infrared position limiter 512 is shaded by a shading plate 404, a controller 6 controls the servo motor 513 to stop working, and the distance between the intersection point and a circle center groove 101 is obtained by observing a measuring tape 8; and inputting the numerical value measured by the measuring tape 8 into the display 7, and obtaining the throwing distance according to the triangle similarity theorem.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. A sports throwing measuring device comprises a throwing area (1), a resisting plate (2), a fan-shaped landing area (3) and a landing point positioning assembly (4); the abutting plate (2) is tangent to the peripheral side surface of the throwing area (1);
the method is characterized in that:
the surface of the abutting plate (2) is provided with a limiting channel (201); a threaded hole (202) is formed in one side face of the abutting plate (2); the throwing area (1) is provided with a circle center groove (101);
one side surface of the abutting plate (2) is fixedly connected with a point-of-intersection positioning component (5); the surface of the intersection point positioning component (5) is sequentially provided with a controller (6) and a display (7); the intersection point positioning component (5) is matched with a measuring tape (8) in a rotating way; one end of the measuring tape (8) is fixedly connected with a sliding sleeve (801); the sliding sleeve (801) is in sliding fit with a support frame (9);
the intersection point positioning assembly (5) comprises a fixing plate (501); one side surface of the fixing plate (501) is fixedly connected with an angle steel (502); a first sliding channel (503) and a second sliding channel (504) are sequentially formed in the surface of the fixing plate (501); the other side surface of the fixing plate (501) is fixedly connected with a gear rack (505);
a sliding plate (508) is in sliding fit between the angle steel (502) and the fixed plate (501); the bottom of the sliding plate (508) is fixedly connected with a first sliding rail (509); the other side surface of the sliding plate (508) is fixedly connected with a supporting plate (510); an infrared limiter (512) is fixedly connected to one side, close to the sliding plate (508), of the surface of the supporting plate (510); a servo motor (513) is fixedly connected to the surface of the sliding plate (508) far away from the infrared limiter (512); the output end of the servo motor (513) is fixedly connected with a rotating gear (514); the rotating gear (514) is meshed with the gear rack (505) for rotating matching;
the surface of the supporting plate (510) is fixedly connected with a mounting frame (515); the side surface of the mounting rack (515) is fixedly connected with an L-shaped connecting rod (516); one end of the L-shaped connecting rod (516) is fixedly connected with a sliding block (517); the sliding block (517) is in sliding fit with the limiting channel (201);
a limiting clamping plate (518) is fixedly connected to one end, close to the peripheral side face of the L-shaped connecting rod (516); extrusion springs (519) are symmetrically and fixedly connected to two sides of the inner wall of the limiting clamping plate (518); one end of the extrusion spring (519) is fixedly connected with an extrusion plate (520); the circumferential side surface of the L-shaped connecting rod (516) is fixedly connected with a connecting column (521); the connecting column (521) is matched with the measuring tape (8) in a rotating way;
the support frame (9) comprises a support rod (901); one end of the support rod (901) is fixedly connected with a telescopic adjusting rod (902); the telescopic adjusting rod (902) is in sliding fit with the sliding sleeve (801); the bottom end of the telescopic adjusting rod (902) is fixedly connected with a first plug pin (903);
the landing point positioning assembly (4) comprises a support base plate (401); the peripheral side surface of the supporting bottom plate (401) is fixedly connected with a positioning frame (402); the bottom of the supporting bottom plate (401) is fixedly connected with a second plug pin (403); a shading plate (404) is fixedly connected to the surface of the supporting bottom plate (401).
2. A sports pitch measuring device according to claim 1 wherein said gear rack (505) has a connecting plate (506) fixedly attached to one end; a fastening bolt (507) is rotatably matched with the side surface of the connecting plate (506) through threads; the fastening bolt (507) is in threaded rotation fit with the threaded hole (202).
3. A sports pitch measuring device according to claim 1 wherein a second rail (511) is fixedly attached to the bottom of said support plate (510); the first slide rail (509) is in sliding fit with the first slide channel (503); the second slide rail (511) is in sliding fit with the second slide channel (504).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110329574.3A CN112791369B (en) | 2021-03-29 | 2021-03-29 | Sports throwing measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110329574.3A CN112791369B (en) | 2021-03-29 | 2021-03-29 | Sports throwing measuring device |
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| CN112791369A CN112791369A (en) | 2021-05-14 |
| CN112791369B true CN112791369B (en) | 2021-06-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002344292A1 (en) * | 2001-05-25 | 2002-12-09 | James K. Hesch | Apparatus and method for determining a distance between two points |
| CN206896773U (en) * | 2017-06-12 | 2018-01-19 | 石东瑞 | A kind of remote throwing event automatic range unit of athletic competition |
| CN212038929U (en) * | 2020-04-30 | 2020-12-01 | 吉林建筑科技学院 | Sports throwing measuring device |
| CN212789719U (en) * | 2020-09-02 | 2021-03-26 | 杜雷 | Sports throwing measuring device |
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