CN106871715A

CN106871715A - Catapult with crank arm mechanism

Info

Publication number: CN106871715A
Application number: CN201710000298.XA
Authority: CN
Inventors: 孔德庆
Original assignee: 孔德庆
Current assignee: NANTONG HENGQU NEW MATERIAL Co.,Ltd.
Priority date: 2016-03-30
Filing date: 2016-03-30
Publication date: 2017-06-20
Anticipated expiration: 2036-03-30
Also published as: CN106871716B; CN105783587A; CN106871716A; CN105783587B; CN106871715B

Abstract

The present invention relates to a kind of sports goods, specifically a kind of catapult with crank arm mechanism.Including handle and the bow body installed in handle upper end, rubber band is provided with bow body, the lower section of left bow body and right bow body is separately installed with connecting lever by hinge, and forearm connection position and postbrachium connection position are respectively provided with two armed levers of connecting lever, and hinge is arranged on the junction of two armed levers；The position that hinge is different from bow body is provided with power-assisted anchor point；The upper end of left bow body and right bow body is separately installed with pulley, and the end of rubber band bypasses pulley and is fixedly connected on forearm connection position or postbrachium connection position or power-assisted anchor point.The power assisted catapult is using the torque using connecting lever regulation rubber band, and compact conformation, handling are strong；The bow body of horizontal rotation is conducive to keeping bow that body is vertical with sight line, equilibrium bomb pocket both sides rubber band elastic force, the raising accuracy of fire.

Description

Catapult with crank arm mechanism

Technical field

The present invention relates to a kind of sports goods, specifically a kind of catapult with crank arm mechanism.

Background technology

Catapult is a kind of conventional physical culture, game articles, and common catapult is made up of the bow body of a Y shape, the two of bow body Fasten rubber band, the bullet pocket of the centre with parcel bullet of rubber band in end.The power of catapult depends on the elastic force and length of rubber band Degree, but due to being limited by the exhibition of human body arm, the length of rubber band can not possibly indefinite extension；On the other hand it is subject to human body arm strength Limitation, the elastic force of rubber band is also impossible to unlimited enhancing.In addition, playing the centre position that pocket is arranged on rubber band, required in use The bow body of catapult is vertical with sight line, otherwise easily causes the rubber band elastic force imbalance for playing pocket both sides, and the bullet of injection deviates Sight line, but common catapult bow body and handle using being fixedly connected, it is vertical with sight line using being difficult to keep to bend body, shooting Accuracy is affected.

The content of the invention

It is an object of the invention to provide the bullet with crank arm mechanism that a kind of elastic force is big, the ejection degree of accuracy is high, easy to use Bow.

The present invention is for the solution technical scheme that is used of technical problem：

Catapult with crank arm mechanism of the present invention includes handle and the bow body installed in handle upper end, and the bow body includes The lower end of symmetrically arranged left bow body and right bow body, the left bow body and right bow body is fixed together by bending body connecting rod, Rubber band is provided with bow body, the middle setting of the rubber band has bullet pocket, and the left lower section of body and right bow body of bending is by hinge Axle is separately installed with connecting lever, and forearm connection position and postbrachium connection position are respectively provided with two armed levers of the connecting lever, and hinge is set In the junction of two armed levers；The position that hinge is different from bow body is provided with power-assisted anchor point；It is left bow body and right bow body it is upper End is separately installed with pulley, and the end of rubber band bypasses pulley and is fixedly connected on forearm connection position or postbrachium connection position or helps On power anchor point.

The bow body includes being fixedly connected on lower end and the hinge support that extends downwardly of left bow body and right bow body, the hinge Axle is rotatably inserted on hinge support.

The lower end of the hinge support is fixedly connected by connecting rod with the lower end of handle.

The end of rubber band is fixedly connected in forearm connection position, is provided between postbrachium connection position and power-assisted anchor point Power-assisted elastomer, the power-assisted elastomer is the resilient rubber band of tool or spring.

Armed lever pulley is provided with forearm connection position, the rubber band bypasses armed lever pulley and is fixedly connected on postbrachium connection On position；Simultaneously through being inserted on left bow body and right bow body, connecting lever is fixedly connected on the two ends of hinge, the hinge to same hinge Torsion spring is provided between left bow body or right bow body.

Armed lever pulley is provided with forearm connection position and postbrachium connection position, the rubber band bypasses forearm connection position successively On armed lever pulley and postbrachium connection position on armed lever pulley be fixedly connected on power-assisted anchor point；Same hinge is simultaneously through slotting Mounted in the both sides of hinge support, connecting lever is fixedly connected on the two ends of hinge, and torsion spring is provided between the hinge and bow body.

The outside slip cap of the handle is equipped with sliding sleeve.

As a result of said structure, the power assisted catapult is using the torque using connecting lever regulation rubber band, compact conformation, behaviour Control performance is strong；The bow body of horizontal rotation is conducive to keeping bow that body is vertical with sight line, equilibrium bomb pocket both sides rubber band elastic force, carries The accuracy of fire high.

Brief description of the drawings

Fig. 1 is the structural representation of one embodiment of the invention.

Fig. 2 is the structural representation of another embodiment of the present invention.

Fig. 3 is the side view cutaway drawing for bending body end portion.

Fig. 4 is the side view cutaway drawing in another embodiment of the present invention bow body end portion.

Fig. 5 is the side view cutaway drawing in third embodiment of the invention bow body end portion.

Fig. 6 is the side view cutaway drawing in four embodiment of the invention bow body end portion.

Specific embodiment

As shown in Figure 1 and Figure 2, the catapult with crank arm mechanism of the present invention includes handle 1 and on handle The bow body at end, the bow body includes symmetrically arranged left bow body 21 and right bow body 22, under the left bow body 21 and right bow body 22 End is fixed together by bending body connecting rod 23, and rubber band 3 is provided with bow body, and the middle setting of the rubber band 3 has bullet The lower section of pocket 4, the left bow body 21 and right bow body 22 is separately installed with connecting lever 5 by hinge, on two armed levers of the connecting lever Forearm connection position 52 and postbrachium connection position 53 are respectively provided with, hinge is arranged on the junction of two armed levers；Hinge is different from bow body The position of axle is provided with power-assisted anchor point 54；The upper end of left bow body 21 and right bow body 22 is separately installed with pulley 6, rubber band 3 End bypasses pulley 6 and is fixedly connected on forearm connection position 52 or postbrachium connection position 53 or power-assisted anchor point 54.

As shown in figure 1, the bow body includes being fixedly connected on the lower end of left bow body 21 and right bow body 22 and extends downwardly Hinge support 29,30, the hinge is rotatably inserted on hinge support 29,30.

As shown in Fig. 2 the lower end of the hinge support 29,30 is fixedly connected by connecting rod with the lower end of handle 1.

Such as Fig. 3, Fig. 4 embodiment, the end of rubber band 3 is fixedly connected in forearm connection position 52, in postbrachium connection position 53 Power-assisted elastomer 55 is provided between power-assisted anchor point 54, the power-assisted elastomer is the resilient rubber band of tool or spring. When pulling rubber band 3, connecting lever 5 overcomes the resistance of power-assisted elastomer 55 to deflect, as forearm connection position 52 is connected with postbrachium The change of 53 positions of position, the torque of rubber band 3 is converted, and the length ratio of two armed levers can be as needed selected during production design And two angles between armed lever, the stage casing stress for stretching rubber band 3 is larger, and the later stage of stretching reduces resistance, is conducive to taking aim at Quasi- shooting.

Such as Fig. 5 embodiments, armed lever pulley is provided with forearm connection position 52, the rubber band 3 bypasses armed lever pulley and consolidates Surely it is connected in postbrachium connection position 53；Same hinge simultaneously through being inserted on left bow body 21 and right bow body 22, fix and connect by connecting lever 5 The two ends of hinge are connected on, torsion spring is provided between the hinge and left bow body 21 or right bow body 22.Torsion spring makes connecting lever 5 keep special Fixed angle, when pulling rubber band 3, connecting lever 5 overcomes the active force of torsion spring to deflect, with the deflection of connecting lever 5, armed lever The angles and positions of pulley support rubber band 3 change, so as to change the stretching moment of torsion of rubber band 3.

Such as Fig. 6 embodiments, armed lever pulley, the rubber band 3 are provided with forearm connection position 52 and postbrachium connection position 53 The armed lever pulley on armed lever pulley and postbrachium connection position 53 in forearm connection position 52 is bypassed successively is fixedly connected on power-assisted positioning On point 54；Simultaneously through the both sides for being inserted into hinge support 29,30, connecting lever 5 is fixedly connected on the two ends of hinge, institute to same hinge State and be provided with torsion spring between hinge and bow body.

Certainly, as another embodiment of the present invention, the hinge can also be using two-part, i.e., left bow body 21 and the right side Bow body 22 is respectively mounted respective hinge, and torsion spring is respectively mounted between each hinge and corresponding left bow body 21 or right bow body 22.

The outside slip cap of the handle 1 is equipped with sliding sleeve 12.Bow body 2 can be with 3 liang of changes of side draw of rubber band or so Swing, it is vertical with sight line holding all the time, be conducive to improving the degree of accuracy shot.

Claims

1. the catapult with crank arm mechanism, including handle（1）And installed in the bow body of handle upper end, the bow body includes symmetrical The left bow body for setting（21）With right bow body（22）, the left bow body（21）With right bow body（22）Lower end by bending body connecting rod（23） It is fixed together, bends body（2）On be provided with rubber band（3）, the rubber band（3）Middle setting have bullet pocket（4）, it is special Levy and be：The left bow body（21）With right bow body（22）Lower section connecting lever is separately installed with by hinge（5）, the two of the connecting lever Forearm connection position is respectively provided with individual armed lever（52）With postbrachium connection position（53）, hinge is arranged on the junction of two armed levers；In bow Position on body different from hinge is provided with power-assisted anchor point（54）；Left bow body（21）With right bow body（22）Upper end be respectively mounted There is pulley（6）, rubber band（3）End bypass pulley（6）It is fixedly connected on postbrachium connection position（53）On；In forearm connection position （52）On be provided with armed lever pulley, the rubber band（3）Bypass armed lever pulley and be fixedly connected on postbrachium connection position（53）On；It is same Hinge is inserted into left bow body while running through（21）With right bow body（22）On, connecting lever（5）It is fixedly connected on the two ends of hinge, the hinge Axle and left bow body（21）Or right bow body（22）Between be provided with torsion spring.

2. the catapult with crank arm mechanism according to claim 1, it is characterised in that：The bow body includes being fixedly connected on Left bow body（21）With right bow body（22）Lower end and the hinge support that extends downwardly（29、30）, the hinge rotatably inserts In hinge support（29、30）On.

3. the catapult with crank arm mechanism according to claim 2, it is characterised in that：The hinge support（29、30）'s Lower end passes through connecting rod and handle（1）Lower end be fixedly connected.