KR19980068926U - Tennis exerciser - Google Patents

Abstract

The present invention relates to a tennis exerciser that can throw a tennis ball to practice tennis alone; The purpose of the present invention is low production cost, can be used without power, free to move the exerciser if necessary, no cost for power supply, and also does not consume fossil energy To provide a tennis exerciser; In order to achieve the above object, the present invention, the drive shaft 11, the cogwheel 13, the mainspring 14, the guide gear 16, the driven gear 17, the latch 19, constant speed mechanism (CVM) ), The throwing lever 23, the stopper, and provides a tennis exerciser, characterized in that consisting of the ball supply hopper.

Description

Tennis exerciser

The present invention relates to a tennis exerciser that throws a tennis ball to practice tennis alone.

In order to master a sport that is played by hitting a ball thrown by others, such as tennis, it is necessary to practice hitting a ball thrown by others. However, practicing in the manner of catching a ball thrown by another person is not only difficult for the person who throws the ball, but also requires a lot of hard work. There is no difficulty.

To solve these difficulties, various tennis exercisers have been developed.

One of the conventional tennis exercisers described above is disclosed in Korean Utility Model Publication No. 95-10322.

Looking at the configuration of the conventional tennis exerciser with a focus on the configuration associated with the present invention with reference to Figure 1, a throwing hole (2) is formed on the front of the case (1), the throwing inside of the case (1) Two pitching rollers 3 and 4 are arranged to be spaced apart slightly from each other in a position facing the ball 2, and the pitching rollers 3 and 4 are opposite to each other on top of the pitching rollers 3 and 4, respectively. It can be seen that the DC pitching motors 5 and 6 which rotate in the directions are respectively provided.

According to the operation of the conventional tennis exerciser according to the above configuration, when the DC pitching motors 5 and 6 are operated, the two pitching rollers 3 and 4 rotate in opposite directions with respect to each other. When the exercise ball is inserted between the rotation of the rollers 3 and 4, the exercise ball is thrown forward through the throwing hole 2 by the rotational force of the pitching rollers 3 and 4.

However, since the conventional tennis exerciser including the above-described tennis exerciser adopts a method of driving using electricity as a power source, the configuration is complicated and the production cost is high, and it is impossible to use without power supply, There is a problem in that it is difficult to move freely, costs for power supply, and also consumes fossil energy, so it is not environmentally friendly.

The purpose of the present invention is low production cost, can be used without power, free to move the exerciser if necessary, no cost for power supply, and also does not consume fossil energy It is to provide a tennis exerciser.

1 is a partial cutaway perspective view showing a conventional tennis exerciser,

2 is an exploded perspective view of a tennis exerciser according to the present invention;

Figure 3 is an assembled perspective view of Figure 2,

4 is another assembled state perspective view of FIG.

5 is an operating state diagram showing the operating relationship of the constant speed mechanism according to the present invention,

6 is an operating state diagram showing the operating relationship between the guide gear and the throwing lever according to the present invention.

* Explanation of symbols for main parts of the drawings

11: drive shaft 13: main gear

14: Manual winding 16: Guide gear

17: driven gear 19: latch

23: throw lever CVM: fixed speed mechanism

The present invention, the drive shaft rotatably installed; A main cog gear fixedly installed at one side of the drive shaft and having a tooth biased to one side; A spring installed around the drive shaft, each end of which is fixed to the main frame and the drive shaft; A guide gear provided with a plurality of guide protrusions while being freely rotated between the spring and the cogwheel gear; A driven gear fixed to the guide gear; It is installed on the outer side of the driven gear, a protrusion is provided in the middle, one end is rotatably supported, the other end is supported by a fixed spring, and the protrusion is installed to engage the main gear gear Latch; It is installed adjacent to the driven gear, consisting of a connecting gear, a regulating gear and a constant speed gear, the connecting gear is rotatably installed by a shaft in engagement with the driven gear, the adjusting gear is connected to the connecting gear It is fixedly installed and teeth are biased to one side, and the constant speed ball is composed of a weight plate and two elastic pins and is installed to be rotated obliquely by an axis in a position adjacent to the control gear, and one elastic pin is connected to the control gear. A constant speed mechanism adapted to be engaged; A throwing lever having an intermediate portion supported by a shaft and rotatably installed at a position adjacent to the guide gear, the upper end of which is joined to an outer circumferential surface of the guide gear, and the lower end of which is an elastic support; A stopper installed adjacent to the guide gear; And a ball supply hopper installed adjacent to the above-described devices, the ball supply passage being formed therein, and the lower end of the ball supply passage being connected to the supply hole. .

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the tennis exerciser according to the present invention.

First, the configuration of the tennis exerciser according to the present invention.

Reference numeral 10 designates a main frame that supports the entire device.

The drive shaft 11 is rotatably installed on the main frame 10.

At one end of the drive shaft 11, a handle 12 for rotating the drive shaft 11 is fixedly installed, while at the position adjacent to the other end of the drive shaft 11, the main cog gear 13 is biased to one side. Is fixedly installed.

A spring 14 for storing power is installed around the drive shaft 11, and an outer end of the spring 14 is fixed to an upper side of the main frame 10 while an intermediate portion of the drive shaft 11 is fixed. The inner end of the mainspring 14 is fixed to.

The mainspring housing 15 may be installed around the mainspring 14 to protect the mainspring 14.

A guide gear 16 and a driven gear 17 fixed to each other between the mainspring 14 and the cogwheel 13 are installed to be freely rotated regardless of the rotation of the drive shaft 11. In addition, a plurality of guide protrusions 16a are formed around the guide gear 16 to be spaced apart at regular intervals to guide the throwing lever to be described later.

A latch (19) having a protrusion (19a) in the middle of the driven gear 17 to interlock the main gear gear 13 and the driven gear 17 when rotating in the direction of release of the spring Is installed, one end of the latch 19 is rotatably supported on the side of the driven gear 17 and the other end of the latch 19 is a spring 18, the one end is fixed to the driven gear 17 It is supported by the side of the driven gear 17 and the projection 19a of the latch 19 is installed to engage with the cogwheel 13.

The rear of the driven gear 17 is provided with a constant speed mechanism (CVM) to prevent the spring 14 from being released at a time to prevent the constant speed movement. The constant speed mechanism (CVM) is composed of a connecting gear 20, an adjusting gear 21 and a constant speed tool 22. The connecting gear 20 and the adjusting gear 21 are installed by a shaft in a connected state, the connecting gear 20 is installed to mesh with the driven gear 17 while the adjusting gear 21 Is formed so that it is biased to one side. In the position adjacent to the control gear 21, the constant speed tool 22 is composed of a weight plate 22a weighing out and two elastic pins 22b spaced apart on both sides on one side of the weight plate 22a. Is installed obliquely by the shaft on the main frame 10, any one of the two elastic pins (22b) is installed to engage the control gear 21.

A throwing lever 23 is installed below the guide gear 16, and an upper end of the throwing lever 23 is joined to the outer circumferential surface of the guide gear 16 while being guided to the main frame 10. The middle part of the throwing lever 23 is supported by the shaft for rotational movement. Meanwhile, a throwing plate 24 may be installed at the lower end of the throwing lever 23 to smoothly throw the tennis ball, and a lowering side supply portion of the throwing lever 23 may supply a tasing ball when descending. In order to reliably block the blocking plate 25 may be installed.

The lower end of the throwing lever 23 is provided with a compression spring 26 elastically supporting the throwing lever 23 in order to exert a compression force when the throwing lever 23 is lowered.

In the main frame 10, a throwing ball (not shown) in which a tennis ball is thrown is formed at a position corresponding to the lower front of the throwing lever 23, and on one side of the throwing lever 23. In the corresponding position, a supply hole 28 for supplying the tennis ball to the apparatus is formed.

In addition, in front of the guide gear 16 or driven gear 17, a conventional stopper (not shown) that can limit their rotational movement; for example, the guide gear 16 or driven gear when moving forward The guide gear 16 or driven gear 17 is interlocked to block the rotation of the guide gear 16 or the driven gear 17, and in case of reversing, the guide gear 16 or the driven gear 17 is separated from the guide gear 16 or driven gear 17. To perform the function of allowing the rotation of the (17).

On the other hand, in the vicinity of the above-described device is provided with a ball supply passage therein is provided with a ball supply hopper (not shown) for loading and supplying the tennis ball, the lower end of the ball supply passage formed in the ball supply hopper is It is installed to be connected to the supply hole (28).

Hereinafter will be described the operation of the present invention.

First, the action in the process of winding the mainspring 13 will be described.

When the handle 12 is rotated in the counterclockwise direction with reference to FIG. 3, the outer end of the mainspring 14 is fixed to the main frame 10 while the main spring 10 is fixed to the middle portion of the drive shaft 11. Since the inner end of 14 is fixed, the mainspring 14 is wound by the rotation of the drive shaft 11 according to the rotation of the handle 12. In the process of winding the mainspring 14 as described above, the main gear gear 13 fixed to the position adjacent to the other end of the driving shaft 11 also rotates counterclockwise at the same time.

In addition, since the latching gear 15 is biased to one side and the latch 19 engaged with the driving gear 15 is elastically supported by the spring 18, the latch 19 Is driven by the cogwheel 15 so that the driven gear 17 to which the latch 19 is fixed cannot be rotated. Accordingly, the guide gear 16 fixed to the driven gear 17 does not rotate, and the connecting gear 20 engaged with the driven gear 17 does not rotate, and the adjustment fixed to the connecting gear 20 does not occur. The gear 21 also cannot rotate, and the constant speed gear 22 connected to the control gear 21 is also stopped and does not move.

In addition, since the guide gear 16 does not rotate, the throwing lever 23 attached to the outer circumference of the guide gear 16 also stops without moving.

Next, the action after winding the mainspring 14 will be described.

After winding the mainspring 14, the mainspring 14 can be maintained without immediately unwinding and later operated by unwinding the mainspring 13 or immediately by unwinding the mainspring 14. have.

If the spring 14 is to be held immediately for later use without being unwound, the stopper is advanced to engage the stopper 16 with the guide gear 16 or the driven gear 17, thereby allowing the guide gear 16 or the driven gear to follow. The rotation of the gear 17 is blocked.

On the other hand, if you want to immediately unwind the spring 14, the device is operated as follows.

Winding the spring 14 using the handle 12 and then releasing the handle 12 without operating the stopper, the spring 14 is released and the drive shaft 11 is based on FIG. 3. Rotate clockwise. At this time, the cogwheel 15 is fixed to the other end of the drive shaft 11 also rotates in the clockwise direction with reference to FIG.

In addition, since the latch 19 engaged with the cogwheel 15 is not pushed at this time, the driven gear 17 to which the latch 19 is fixed rotates clockwise with reference to FIG. 3. . Accordingly, the guide gear 16 fixed to the driven gear 17 also rotates clockwise with reference to FIG. 3, and the connecting gear 20 engaged with the driven gear 17 is counterclockwise based on FIG. 3. Direction, and the adjustment gear 21 fixed to the connecting gear 20 also rotates counterclockwise with reference to FIG.

As the control gear 21 rotates, one elastic pin 22b engaged with the control gear 21 is pushed for a predetermined time and pushed backward, while the one elastic pin 22b is As the weight plate 22c is pivoted as it is pushed backward by pressure, the other elastic pin 22b is engaged with the adjustment gear 21. In addition, the above-described process allows the mainspring 14 to be released slowly at a constant speed while repeating the process of unwinding the mainspring 14.

On the other hand, as the aforementioned spring 14 is released, the guide gear 16 is rotated in the clockwise direction with reference to FIG. 3, so that the throwing lever 23 having the upper end bonded to the guide gear 16. The upper end is lifted upward when the guide protrusion 16a is lifted up, and the lower end is strongly compressed by the compression spring 26 while the upper end is pushed by the guide protrusion 16a. The lower end is suddenly lifted upward by 26, and the upper end is suddenly leaned downward. Then, immediately after the throwing lever 23 is strongly compressed by the compression spring 26, the tennis ball is introduced through the supply hole 28, while the lower end of the throwing lever 23 is the compression spring 26. The tennis ball thrown in at the moment suddenly lifted upward by the) is thrown through the throwing ball (27). This operation is repeated as the upper end of the throwing lever 23 moves up and down the guide protrusion 16a until the mainspring 14 is completely released.

In addition, when the mainspring housing 15 is installed around the mainspring 14, the mainspring housing 15 completely surrounds the mainspring 14.

In addition, when the throwing plate 24 is installed on the lower end of the throwing lever 23, while the blocking plate 25 is installed on the lower side of the throwing lever 23, the throwing action and blocking of the throwing lever 23. The area of action is maximized.

According to the present invention, since the power is supplied using the mainspring 14, the configuration is simple and the manufacturing cost is low, and since the device can be driven without a separate power supply, it can be used without a power source. It is simple and can be moved freely when needed because it does not require a connection to a power source.There is no need for electricity supply because it does not require electricity supply, and it does not consume fossil energy such as electricity or oil. Tennis exerciser is provided.

In addition, when the mainspring housing 15 is installed around the mainspring 14, the mainspring 14 interferes with other components, thereby preventing a breakdown, dust or moisture from penetrating and damaging the mainspring 14. Exerted.

In addition, when the throwing plate 24 is installed on the lower end of the throwing lever 23, while the blocking plate 25 is installed on the lower side of the throwing lever 23, the tennis ball is smoothly thrown while the When the throwing lever 23 is lowered, the effect that can completely block the supply of the taste ball is exerted.

Claims (3)

A drive shaft 11 rotatably installed; A main cog gear 13 which is fixed to one side of the drive shaft 11 and whose teeth are biased to one side; A spring 14 which is installed around the drive shaft 11 and whose ends are fixed to the main frame 10 and the drive shaft 11, respectively; A guide gear (16) provided with a plurality of guide protrusions (16a) installed freely between the mainspring (14) and the cogwheel gear (13); A driven gear 17 fixed to the guide gear 16; It is installed on the outer side of the driven gear 17, the middle is provided with a projection (19a), one end is rotatably supported, the other end is supported via a spring 18, the one end is fixed, and the protrusion 19a, latch 19 is provided to engage with the cogwheel gear (15); It is installed adjacent to the driven gear 17, and consists of a connecting gear 20, the control gear 21 and the constant speed gear 22, the connecting gear 20 is engaged with the driven gear 17. In the rotatably installed by the shaft, the control gear 21 is fixed to the connecting gear 20 while the tooth is biased to one side, and the constant speed opening 22 is the weight plate 22a and two It consists of an elastic pin (22b) of the constant speed mechanism is installed so as to be rotated at an angle to the position adjacent to the control gear (21) by an axis, one elastic pin (22b) is engaged with the control gear (21) ( CVM); A middle lever supported by a shaft at a position adjacent to the guide gear 16 to be rotatably installed, and an upper end of the guide gear 16 coupled to the outer circumferential surface thereof while the lower end of the throwing lever 23 is elastically supported; A stopper installed adjacent to the guide gear 16; And a ball supply hopper installed adjacent to the above-described devices, wherein a ball supply passage is formed therein, and a lower end of the ball supply passage is connected to the supply hole 27. . The tennis exercise machine according to claim 1, wherein a spring housing (15) is provided around the spring (14). The method of claim 1 or 2, wherein the throwing plate 24 is provided on the lower end of the throwing lever 23, while the blocking plate 25 is provided on the lower side of the throwing lever 23. Featuring a tennis exerciser.