Volleyball spiking blocking device and method

Abstract

The invention relates to the technical field of volleyball training instruments, in particular to a volleyball spiking blocking device and method, a lower long edge beam of the volleyball spiking blocking device is in a [shape and comprises a lower long edge main beam parallel to a net plate long edge beam and extension beams perpendicularly and fixedly connected with the two ends of the lower long edge main beam, and the bottom end of a wide edge beam can swing back and forth in a pitching mode relative to the extension beams; the elastic connecting pieces are in elastic sliding connection along the upper surfaces of the extension beams; the back surfaces of the two wide edge beams are respectively and fixedly provided with a pushing and pressing plate; the bottom end of the elastic telescopic ejector rod is fixed to the upper surface of the rear end of the extending beam, and the top end, capable of moving telescopically, of the elastic telescopic ejector rod is located in an area defined by the pushing and pressing plate and the wide edge beam and makes contact with the bottom face of the pushing and pressing plate and the back face of the wide edge beam at the same time; the elastic connecting piece and the elastic telescopic ejector rod enable the wide edge beam to be in the initial vertical position in the non-use state. Through the technical means, the effects of buffering the impact of the blocking net and preliminarily evaluating the spiking quality can be achieved.

Description

Technical Field

[0001] This invention relates to the field of volleyball training equipment technology, and in particular to a volleyball spike blocking device and method. Background Technology

[0002] In volleyball, spiking and blocking are crucial technical aspects. Spiking requires athletes to have good jumping ability, strength, control of the hitting point, and arm swing speed, while blocking requires athletes to accurately judge the trajectory of the incoming ball, jump quickly, and effectively block the opponent's spiking route.

[0003] Currently, the spiking and blocking equipment used in traditional volleyball spiking and blocking training mainly falls into two categories: T-shaped blocks and electronically driven blocks. Essentially, these are the traditional handheld blocks and automatic blocks, respectively. In comparison, electronically driven blocks are more intelligent and have higher simulation efficiency. They can obtain data such as the athlete's jump time for each block, the effective coverage area of ​​the block, and the buffering effect on balls of varying strengths. They can also set up spiking simulation modules to simulate different tactical spiking trajectories from the opponent's positions two and four, and adjust the height, width, and tilt angle of the blocking adjustment module based on these trajectories to more closely resemble the blocking layout in a real match.

[0004] However, automatic blocks can only train spikers, not blockers. In other words, although electronically driven blocks have the aforementioned significant training effects, they are only for volleyball spike training. Blockers themselves cannot gain simulated training experience. This is why, even though players in countries like Japan have long used robotic spikers and blocks, the Chinese national team still uses traditional handheld spikers and blocks, such as the aforementioned T-shaped blocker. This type of training equipment is simple in structure, easy to manufacture, and can provide two-way training for both spikers and blockers, better simulating real combat.

[0005] Most existing T-shaped blockers are rectangular frames with netting installed inside. They have a pair of handles at the bottom, one in each hand, which the blocker holds to lift and intercept the spiked ball over the net. Traditional handheld blockers rely solely on the netting inside the frame to cushion the impact of the volleyball. Combined with their handheld design, this results in significant impact on the player's hands, especially the wrists. Under high-intensity spiking training, this can easily lead to blocker fatigue, significantly shortening training time and reducing training effectiveness, and even causing wrist injuries in some cases. Furthermore, different players have different physical abilities, and traditional handheld blockers cannot adjust their impact resistance, making it difficult to tailor them to different players and thus failing to maximize fatigue reduction and training duration. Summary of the Invention

[0006] The purpose of this invention is to provide a volleyball spike blocker and method, which solves the problems of existing handheld volleyball spike blockers not being able to effectively cushion and protect players during blocking, and not being able to intuitively reflect the quality of spikes.

[0007] To achieve the above objectives, the present invention provides a volleyball spike blocking device, comprising a rectangular net plate, the net plate comprising two upper and lower long side beams and two left and right wide side beams, the top ends of the two wide side beams being fixed to the two ends of the upper long side beam respectively, and the bottom ends of the two wide side beams being slidably connected to the lower long side beam respectively. The lower long side beam is in the shape of [, which includes a lower long side main beam parallel to the long side beam of the mesh plate, and an extension beam that is perpendicularly fixed to both ends of the lower long side main beam. The bottom end of the wide side beam can swing back and forth relative to the extension beam, and is elastically slidably connected along the upper surface of the extension beam through an elastic connector; a push plate is fixed on the back of each of the two wide side beams. It also includes an elastic telescopic top rod with its bottom end fixed to the upper surface of the rear end of the extension beam. The top end of the elastic telescopic top rod, which can telescopically move, is located within the area enclosed by the push plate and the wide side beam, and simultaneously contacts the bottom surface of the push plate and the back surface of the wide side beam. The elastic connector and elastic telescopic top rod ensure that when the wide beam is not in use, it is in close contact with the side of the block protruding on the upper surface of the front end of the extension beam, so as to be in the initial vertical position.

[0008] Among them, a cylindrical sliding column is fixed at the bottom end of the wide side beam, and the axis of the sliding column is parallel to the long side beam; a sliding groove is provided inside the extension beam along its length. The elastic connector includes a locking plug and a pressure spring. The sliding column, locking plug, and pressure spring are slidably installed in the sliding groove from front to back, and the pressure spring is always in a compressed state so that one side of the locking plug is tightly pressed against the side of the sliding column, so that the front side of the bottom end of the wide beam contacts the stop block.

[0009] The front side of the slide groove is a concave arc surface to allow the slide column to fit and contact, while the rear side of the slide groove is a flat surface to connect with the end of the pressure spring. The two wide beams have an integral lug at the bottom of their opposite sides, which makes the bottom of the wide beams L-shaped. The bottom of the lug is connected to the sliding column via a connecting post and a spindle perpendicular to the connecting post.

[0010] A limiting block is slidably installed in the groove near its rear end. The limiting block is connected to the end of the pressure spring. An adjusting stud is rotatably installed on the end of the limiting block away from the pressure spring. The adjusting stud is threadedly engaged with the extension beam to adjust the compression degree of the pressure spring in the initial state.

[0011] The slide groove has a rectangular cross-section. A limiting block is slidably installed at the rear end of the slide groove. The limiting block is connected to the end of the pressure spring. One end of an adjusting stud is fixedly installed on the end of the limiting block away from the pressure spring. The other end of the adjusting stud is screwed into a threaded sleeve. The threaded sleeve is installed inside the end of the extension beam with rotation in place, so that when the threaded sleeve rotates, the adjusting stud and the limiting block move axially together.

[0012] Among them, a locking plug is screwed into the rear end face of the extension beam with a thread fit. When the locking plug is tightened, the threaded sleeve is axially pressed and fixed. The threaded sleeve includes a small sleeve section and a large sleeve section that are coaxially arranged and integrally formed. The diameter of the small sleeve section is smaller than that of the large sleeve section. The large sleeve section is rotatably installed inside the end of the extension beam and cannot move axially. On the end face of the large sleeve section facing the locking plug, there are several scale lines arranged in a ring. The extension beam is also provided with a threaded viewing hole around the threaded hole into which the locking plug is screwed. The scale line indicating the position of rotation can be seen through the threaded viewing hole. When the locking plug presses the threaded sleeve to a fixed position, the nut of the locking plug can be screwed into the threaded viewing hole by passing through an anti-rotation bolt.

[0013] The end of the large sleeve with the scale line is also provided with a pair of spaced operating grooves. These operating grooves can be inserted and cooperate with the adjustable rod that can be detachably installed inside the locking screw, so that the threaded sleeve can be rotated by rotating the loose locking screw.

[0014] The adjusting rod includes a plug portion that engages with the slot, and a mounting screw that is threadedly screwed into the end of the locking plug facing the threaded sleeve. The locking plug comprises a coaxial, increasing-radius cylindrical section, a threaded cylindrical section, and a nut, such that when the mounting screw is screwed out a predetermined length towards the outside of the locking plug and the insertion part is inserted into the slot, only the cylindrical section is located in the threaded section of the screw hole.

[0015] The push plate has a ﹁-shaped structure, with its horizontal plate segment being vertically fixed to the back of the wide-side beam, and its vertical plate segment facing downwards. The top end of the elastic telescopic top rod has a tubular shell with an arc-shaped cross-section, which is tangent to the back of the horizontal plate segment and the wide-side beam.

[0016] Meanwhile, this invention also proposes a volleyball spiking and blocking method, which uses the volleyball spiking and blocking device described above for blocking. A first pressure sensing element and a second pressure sensing element are respectively provided in the elastic telescopic top rod and the elastic connecting member. During training, the two handles on the left and right sides of the bottom of the net are held to make the net stand vertically. When the volleyball is blocked, the spiking quality is evaluated according to the ratio of the first pressure sensing element to the second pressure sensing element.

[0017] The present invention relates to a volleyball spike blocker, which is designed based on the structure of the existing handheld T-shaped blocker. It aims to change the problems of poor buffering and inability to initially demonstrate and evaluate the quality of spikes. It can not only greatly alleviate the strong impact of spike blocking, but also simulate the training effect of the opponent's player counter-attacking the ball after blocking in actual combat. To a certain extent, it also has some of the functions of an automatic blocker.

[0018] Specifically, it can effectively cushion and protect blockers when intercepting spikes, reduce training fatigue, extend training time, and rapidly enrich the practical experience of both spikers and blockers. Furthermore, the simulated rebound and toss mechanism during a spike interception allows for continuous training, resulting in a more realistic simulation effect.

[0019] Furthermore, in practical use, the volleyball spike blocker can also visually demonstrate the spiking quality of players during spiking training in a simple manner, allowing for a preliminary assessment of the players and a clear understanding of the training effect.

[0020] Other effects of this volleyball spike blocking device will be gradually demonstrated in subsequent embodiments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0022] Figure 1 This is a side view of the volleyball spike blocker of the present invention in its initial state.

[0023] Figure 2 This is a side view of the volleyball spike blocker of the present invention when intercepting a volleyball.

[0024] Figure 3 yes Figure 1 Enlarged view of the structure at point A in the middle.

[0025] Figure 4 This is a front view of the volleyball spike blocking device of the present invention.

[0026] Figure 5This is a rear view of the volleyball spike and blocker of the present invention after the elastic telescopic top rod and its auxiliary components have been removed, and is viewed in cross section along the extension beam.

[0027] Figure 6 yes Figure 4 Enlarged view of the structure at point B in the middle.

[0028] Figure 7 yes Figure 5 Enlarged view of the structure at point C.

[0029] Figure 8 This is a top view of the lower long side beam.

[0030] Figure 9 yes Figure 8 MM section view in the image.

[0031] Figure 10 yes Figure 3 Enlarged view of the structure at point D in the diagram.

[0032] Figure 11 This is a schematic diagram of the screw hole at the rear end of the extension beam.

[0033] Figure 12 This is an axial sectional view of a locking screw plug.

[0034] Figure 13 This is a schematic diagram showing the adjusting rod after it has moved outwards towards the locking screw.

[0035] In the diagram: Lower long side beam 1, extension beam 101, stop block 10101, slide groove 10102, lower long side main beam 102, wide side beam 2, upper long side beam 3, ear beam 4, sliding column 5, locking plug 6, pressure bearing spring 7, elastic telescopic top rod 8, limit block 9, adjusting stud 10, threaded sleeve 11, small sleeve section 1101, large sleeve section 1102, locking screw plug 12, smooth column section 1201, threaded column section 1202, nut 1203, push plate 13, horizontal plate section 1301, vertical plate section 1302, handle 14, connecting column 15, mandrel 16, threaded sight hole 17, slot 18, anti-rotation bolt 19, adjusting rod 20, plug-in part 2001, mounting screw 2002, threaded hole section 21, tubular shell 22. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0037] The first embodiment of this application is as follows: Please see Figures 1-2 ,as well as Figures 4-5The volleyball spike blocking device in this embodiment includes a rectangular net plate used to intercept spiked volleyballs. Specifically, the net plate includes two long side beams at the top and bottom, and two wide side beams 2 arranged on the left and right. The top ends of the two wide side beams 2 are fixed to the two ends of the upper long side beam 3, and the bottom ends of the two wide side beams 2 are slidably connected to the lower long side beam 1. That is, the U-shaped frame formed by the wide side beams 2 and the upper long side beam 3 can slide linearly on the lower long side beam 1. A net cloth composed of canvas or interception rope net, etc., for intercepting spiked balls is arranged on this U-shaped frame.

[0038] For specific production details, please refer to the following: Figure 8 As shown, the lower long side beam 1 in this embodiment is [shaped], which includes a lower long side main beam 102 parallel to the long side beam of the mesh plate, and an extension beam 101 perpendicularly fixed to both ends of the lower long side main beam 102. The bottom end of the wide side beam 2 can swing back and forth relative to the extension beam 101, and is elastically slidably connected along the upper surface of the extension beam 101 by an elastic connector, so as to form an elastic sliding connection based on the above sliding connection, which has a certain buffering effect. In addition, in this embodiment, continue to refer to Figures 1-2 Furthermore, a push plate 13 is fixed to the back of each of the two wide side beams 2. Correspondingly, an elastic telescopic top rod 8 with its bottom end fixed to the upper surface of the rear end of the extension beam 101 is also required. The elastic telescopic top rod 8 can elastically contract axially under external pressure, and the top end of the elastic telescopic top rod 8 that can telescopically move is placed within the area enclosed by the push plate 13 and the wide side beam 2, and simultaneously contacts the bottom surface of the push plate 13 and the back of the wide side beam 2, so that the wide side beam 2 or the U-shaped frame can slide backward under the impact of the volleyball.

[0039] In the above design structure, it should be noted that the elastic connector and the elastic telescopic rod 8 allow the wide beam 2 to be tightly attached to the side of the stop block 10101 protruding on the upper surface of the front end of the extension beam 101 when it is not in use, i.e., in the assembled state. The stop block 10101 here acts as a limit, allowing the U-shaped frame or the wide beam 2 to be in the initial vertical position. Especially after intercepting a spike, it can quickly rebound and reset. Furthermore, as one of its key functions, based on the aforementioned pitching and swinging motion, such as the mechanism of the sliding column 5 rotating in the groove 10102 mentioned below, combined with the telescopic effect of the inclined elastic telescopic rod 8, it can achieve an effect similar to the wrist catching the spiked ball and then throwing it upwards. The volleyball is then rebounded and thrown back by the strong elastic force of the elastic connector and the elastic telescopic rod 8, so that the players training to spike can practice receiving and spiking the ball again, improving training efficiency and the realism of the simulation.

[0040] The second embodiment of this application is as follows: Based on the first embodiment, more detailed design aspects are provided below. Figure 3 A cylindrical sliding post 5 can be fixed to the bottom end of the wide-side beam 2, with the axis of the sliding post 5 parallel to the long-side beam, so that the U-shaped frame can swing back and forth under the impact of the ball. Specifically, during manufacturing, a groove 10102 can be provided inside the extension beam 101 along its length to accommodate the sliding post 5. Furthermore, the elastic connecting member in this embodiment includes a locking plug 6 and a pressure spring 7. The sliding post 5, locking plug 6, and pressure spring 7 are slidably installed in the groove 10102 from front to back. Figure 3 As shown, the left side is the front end, and the right side is the rear end or tail end. In the above structure, after installation, the pressure spring 7 is always in a compressed state, so that one side of the locking plug 6 is tightly pressed against the side of the slide column 5, thereby making the front side of the bottom end of the wide beam 2 contact the stop block 10101 and maintain the initial assembly position. As for the structure of the slide groove 10102, the side of the front end of the slide groove 10102 can be a concave arc surface for the slide column 5 to fit and contact, while the side of the rear end of the slide groove 10102 is a flat surface to facilitate connection with the end of the pressure spring 7.

[0041] The third embodiment of this application is as follows: Based on the second embodiment, in order to enable the wide-side beam 2 and the aforementioned U-shaped frame to slide linearly along the extension beam 101 while also pitching back and forth, the installation structure of the sliding column 5 is as follows: Figures 6-7 In this embodiment, it is recommended to integrally process ear beams 4 at the bottom ends of the two wide beams 2 on opposite sides. The ear beams 4 make the bottom ends of the wide beams 2 L-shaped. The bottom of the ear beams 4 is connected to the sliding column 5 through the connecting column 15 and the spindle 16 perpendicular to the connecting column 15, so that the bottom ends of the wide beams 2 can not only slide in contact with the upper surface of the extension beam 101, but also rotate relative to the extension beam 101.

[0042] Furthermore, in this embodiment, as Figure 3 A limiting block 9 is slidably installed at the rear end of the slide groove 10102. This limiting block 9 is connected to the end of the pressure spring 7 and is used to limit the initial elastic state of the pressure spring 7 to adjust the buffering force of the volleyball spike blocker. Furthermore, if the two pressure sensing elements mentioned later are subsequently installed, the magnitude of the detected values ​​by the pressure sensing elements can be adjusted to improve the error accuracy of the pressure ratio; that is, the larger the pressure value, the smaller the error caused by slight pressure differences. In addition, an adjusting stud 10 is coaxially rotatably installed on the end of the limiting block 9 away from the pressure spring 7. This adjusting stud 10 is threadedly engaged with the extension beam 101, so that the compression degree of the pressure spring 7 in its initial state can be directly adjusted when the adjusting screw is screwed in or out, thus adjusting the aforementioned buffering force and error accuracy.

[0043] The fourth embodiment of this application is as follows: Based on the second embodiment, unlike the third embodiment where the adjusting stud 10 is directly screwed in and out in the form of a threaded pair, this embodiment uses the principle of a lead screw mechanism. Specifically, as follows: Figure 9 The cross-section of the slide groove 10102 is rectangular. Similar to the third embodiment, a limiting block 9 is slidably installed inside the slide groove 10102 near its rear end. The limiting block 9 is connected to the end of the pressure spring 7. The difference is that one end of an adjusting stud 10 is fixedly installed on the end of the limiting block 9 away from the pressure spring 7. That is, the adjusting stud 10 and the limiting block 9 are fixed as one piece and move synchronously. Figure 3 The other end of the adjusting stud 10 is screwed into a threaded sleeve 11. This threaded sleeve 11 is installed inside the end of the extension beam 101 with rotation in place, so that when the threaded sleeve 11 rotates, the adjusting stud 10 and the limiting block 9 move axially together to achieve the purpose of adjustment. Unlike the adjusting stud 10 in the third embodiment, which requires axial displacement space, in order to facilitate the rotation of the adjusting stud 10, one end of the adjusting stud 10 needs to protrude from the extension beam 101. The larger the adjustment range, the longer the adjusting stud 10, and the longer the protruding length, which is not conducive to the compact design of the structure and is not convenient for practical use. As a conventional handheld device for volleyball training, the compactness of the structure must be taken into consideration.

[0044] In the above design, in order to fix the adjusting stud 10 by fixing the fixed threaded sleeve 11, thereby fixing the position of the limiting block 9, in this embodiment, as follows: Figure 3 , Figure 10 A locking plug 12 is screwed into the rear end face of the extension beam 101 in a threaded fit. When the locking plug 12 is tightened, it axially presses and fixes the threaded sleeve 11 to fix the position of the limit block 9.

[0045] The fifth embodiment of this application is as follows: Based on the fourth embodiment described above, as follows Figure 3 As shown, the threaded sleeve 11 includes a small sleeve section 1101 and a large sleeve section 1102, which are coaxially arranged and integrally formed. The diameter of the small sleeve section 1101 is smaller than the diameter of the large sleeve section 1102. The large sleeve section 1102 is rotatably mounted within the end of the extension beam 101 and cannot move axially. On the end face of the large sleeve section 1102 facing the locking plug 12, there are several scale lines in a ring array (not shown in the figure), such as... Figures 10-11A threaded viewing hole 17 is provided around the threaded hole in the extension beam 101 into which the locking plug 12 is screwed. Through this threaded viewing hole 17, the scale line indicating the final rotation position can be seen, allowing professionals to determine how many turns the threaded sleeve 11 has made and to what position, ensuring controllable adjustment. Furthermore, the aforementioned threaded viewing hole 17 plays a crucial role during adjustment: when the locking plug 12 presses the threaded sleeve 11 into place, the nut 1203 of the locking plug 12 can be... Figure 10 After the anti-rotation bolt 19 shown is passed through, it is screwed into the threaded viewing hole 17 to firmly fix the locking plug 12, preventing it from loosening due to frequent impact and vibration during blocking. This is very important for volleyball spike blocking devices.

[0046] The sixth embodiment of this application is as follows: Based on the fifth embodiment described above, as follows Figure 3 and Figures 10-11 At one end of the large sleeve 1102 with scale lines, there is also a pair of spaced-apart operating slots. These operating slots can be inserted into the adjusting rod 20, which is detachably installed inside the locking plug 12. After the adjusting rod 20 is pulled out of the locking plug 12 to a certain length, it is inserted into the corresponding operating slot. By rotating the loose locking plug 12, the threaded sleeve 11 can be rotated by a corresponding angle. It should be noted that because the adjusting rod 20 is entirely located inside the locking plug 12, after being pulled out to a certain length, it forms a special wrench with the locking plug 12. When it is inserted into the operating slot, the thread of the locking plug 12 has not yet engaged with the thread on the extension beam 101, so the locking plug 12 can be rotated in place. Specifically, as follows... Figures 12-13 The adjusting rod 20 includes a plug-in portion 2001 that engages with the slot 18, and a mounting screw 2002 that is threadedly screwed into the end of the locking plug 12 facing the threaded sleeve 11. The plug-in portion 2001 is used to engage with the aforementioned operating slot, and the mounting screw 2002 is used to detachably house the adjusting rod 20 in the locking plug 12 via a threaded connection.

[0047] Based on the aforementioned structure, such as Figure 13 The locking plug 12 can be designed as follows: it includes a coaxial cylindrical section 1201 with increasing radius, a threaded cylindrical section 1202 and a nut 1203 in sequence. The length of each section is such that when the mounting screw 2002 is screwed out to a predetermined length from the outside of the locking plug 12 and the insertion part 2001 is inserted into the slot 18, only the cylindrical section 1201 is located in the threaded hole section 21 of the screw hole. That is, through this structural design, the locking plug 12 is kept from threaded engagement with the extension beam 101 and can rotate freely to realize the rotation of the threaded sleeve 11.

[0048] The seventh embodiment of this application is as follows: Based on all the above embodiments, such as Figures 1-2 The push plate 13 is manufactured in a U-shape, with its horizontal section 1301 vertically fixed to the back of the wide-side beam 2, and its vertical section 1302 facing downwards. Correspondingly, a component needs to be fixed to the top of the elastic telescopic top rod 8. This component is a tubular shell 22 with an arc-shaped cross-section. The tubular shell 22 is tangent to both the horizontal section 1301 and the back of the wide-side beam 2, allowing the U-shaped frame to slide backwards and / or tilt back and forth better during netting operation. If necessary, the push plate of the above shape can be hooked together with the tubular shell 22, i.e., the bottom end of the vertical section 1302 is bent into the notch of the tubular shell 22, allowing them to rotate relative to each other and transmit pressure, preventing accidental separation.

[0049] The eighth embodiment of this application is as follows: Based on the description of the volleyball spike blocking device in the above seven embodiments, this embodiment specifically introduces a volleyball spike blocking method, which mainly uses the above-mentioned volleyball spike blocking device for blocking. One of its main purposes is to reduce the impact on the blocking player's hand and effectively extend the training time.

[0050] In addition, a first pressure sensing element and a second pressure sensing element can be respectively installed inside the elastic telescopic top rod 8 and the elastic connector to sense the pressure they bear during blocking. During training, the blocking player holds the two handles 14 on the left and right sides of the bottom of the net to keep the net as vertical as possible. When the volleyball is blocked, the quality of the spike is evaluated based on the ratio of the first pressure sensing element to the second pressure sensing element. Generally, when a player spikes the ball, the volleyball often passes over the net in a diving posture. The higher the quality of the spike, the greater the diving angle, that is, the greater the angle between the volleyball path and the ground. The larger the angle, the less likely the U-shaped frame will slide backward on the extension beam 101 when the ball enters the ground at an angle close to perpendicular to the ground. In fact, the sliding column 5 hardly moves backward in the arc concave surface on the front side of the sliding groove 10102, but only rotates significantly. Of course, this is just an extreme discussion to illustrate the technical effect. In actual matches, spikes will not have such a large diving angle, because the height of the net and the height of the player will not allow such an extreme situation to occur. Therefore, the U-shaped frame will have a backward sliding displacement, which will cause the second pressure sensing element to have an increased detection value. For example, when the spike crosses the net horizontally, i.e., the angle is almost zero, the ball hits the net plate of the volleyball spike blocker almost vertically. This causes a greater tendency for the U-shaped frame to shift horizontally backward, resulting in a relatively smaller pressure distributed on the elastic telescopic top rod 8. In other words, the ratio of the detected values ​​of the first pressure sensing element to the second pressure sensing element is larger. Conversely, if the spike quality is higher, the angle is larger, and the force distributed on the elastic telescopic top rod 8 is greater. The ratio is relatively smaller, so the probability distribution curve of this ratio can be used to preliminarily assess the player's spike quality.

[0051] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A volleyball spiking blocker comprising a rectangular net plate, the net plate comprising two long side beams arranged in up and down directions, and two wide side beams (2) arranged in left and right directions, characterized in that, The top ends of the two wide side beams (2) are fixed at the two ends of the upper long side beam (3), and the bottom ends of the two wide side beams (2) are slidably connected with the lower long side beam (1); The lower long side beam (1) is in a shape of [, which comprises a lower long side main beam (102) parallel to the long side beam of the net plate, and an extension beam (101) fixed perpendicularly at the two ends of the lower long side main beam (102), the bottom end of the wide side beam (2) can swing up and down relative to the front and back of the extension beam (101), and is slidably connected with the upper surface of the extension beam (101) through an elastic connecting piece; a pushing plate (13) is fixed at the back of each of the two wide side beams (2); Further comprising an elastic telescopic top rod (8) fixed at the upper surface of the rear end of the extension beam (101), the top end of the elastic telescopic top rod (8) is located in the area surrounded by the pushing plate (13) and the wide side beam (2), and simultaneously contacts with the bottom surface of the pushing plate (13) and the back surface of the wide side beam (2); The elastic connecting piece and the elastic telescopic top rod (8) make the wide side beam (2) closely contact with the side surface of the stop block (10101) protrusively arranged at the upper surface of the front end of the extension beam (101) in the non-use state, so as to be in the initial vertical position.

2. The volleyball blocking device according to claim 1, wherein The bottom end of the wide side beam (2) is fixed with a cylindrical slide column (5), the axial direction of the slide column (5) is parallel to the long side beam; the inside of the extension beam (101) is provided with a sliding groove (10102) along the length direction thereof; The elastic connecting piece comprises a locking plug (6) and a pressure spring (7), the slide column (5), the locking plug (6) and the pressure spring (7) are sequentially slidably installed in the sliding groove (10102) from front to back, and the pressure spring (7) is always in a compressed state, so that one side of the locking plug (6) is tightly pressed on the side surface of the slide column (5), so that the front side of the bottom end of the wide side beam (2) contacts with the stop block (10101).

3. The volleyball blocking device according to claim 2, wherein The side surface of the front end of the sliding groove (10102) is a circular arc concave surface for the slide column (5) to contact, and the side surface of the rear end of the sliding groove (10102) is a plane for connecting with the end of the pressure spring (7); The bottom end of each of the two wide side beams (2) integrally has an ear beam (4) on one side thereof, the ear beam (4) makes the bottom end of the wide side beam (2) be in an L shape, and the bottom of the ear beam (4) is connected with the slide column (5) through a connecting column (15) and a core shaft (16) perpendicular to the connecting column (15).

4. The volleyball blocking device according to claim 2, wherein A limiting block (9) is slidably installed in the sliding groove (10102) near the rear end thereof, the limiting block (9) is connected with the end of the pressure spring (7), and an adjusting stud (10) is coaxially rotatably installed at one end of the limiting block (9) away from the pressure spring (7), the adjusting stud (10) is threadedly connected with the extension beam (101) to adjust the compression degree of the pressure spring (7) in the initial state.

5. The volleyball spiking net blocker according to claim 2, wherein The cross section of the sliding groove (10102) is rectangular; a limiting block (9) is slidingly installed in the sliding groove (10102) at the rear end thereof, the limiting block (9) is connected with the end of the pressure spring (7), and the end of the limiting block (9) away from the pressure spring (7) is fixedly installed with one end of an adjusting stud (10), the other end of the adjusting stud (10) is screwed into a threaded sleeve (11), and the threaded sleeve (11) is installed in the end of the extension beam (101) in a self-rotation manner, so that when the threaded sleeve (11) rotates, the adjusting stud (10) moves axially together with the limiting block (9).

6. The volleyball spiking net blocker according to claim 5, wherein A locking screw plug (12) is threadedly screwed into the end face of the rear end of the extension beam (101), and when the locking screw plug (12) is screwed tightly, the threaded sleeve (11) is axially compressed and fixed; The threaded sleeve (11) comprises a small sleeve segment (1101) and a large sleeve segment (1102) which are coaxially arranged and integrally formed, the diameter of the small sleeve segment (1101) is smaller than that of the large sleeve segment (1102), the large sleeve segment (1102) is rotatably installed in the end of the extension beam (101) and cannot move axially, and a plurality of scale lines are annularly arranged on the end face of the end of the large sleeve segment (1102) away from the locking screw plug (12); the periphery of the screw hole for screwing the locking screw plug (12) into the extension beam (101) is further provided with a threaded sight hole (17), through which the scale line that is rotated to the position can be seen, and when the locking screw plug (12) compresses and fixes the threaded sleeve (11), the nut (1203) of the locking screw plug (12) can be screwed into the threaded sight hole (17) by a stop bolt (19) passing through the rear end.

7. The volleyball spiking net blocker according to claim 6, wherein The end of the large sleeve segment (1102) provided with the scale lines is further provided with a pair of spaced operating grooves, which can be inserted and matched with the adjusting rod (20) detachably installed in the locking screw plug (12), so as to rotate the locking screw plug (12) which is not tightly screwed to make the threaded sleeve (11) rotate by a corresponding angle.

8. The volleyball spiking net blocker according to claim 7, wherein The adjusting rod (20) comprises an insertion part (2001) which is inserted and matched with the insertion groove (18), and a mounting screw rod (2002) which is threadedly screwed into the end of the locking screw plug (12) away from the threaded sleeve (11); The locking screw plug (12) comprises a light column segment (1201), a threaded column segment (1202) and a nut (1203) which are coaxial and have increasing radii, so that when the mounting screw rod (2002) is rotated outward by a certain length away from the outside of the locking screw plug (12), and the insertion part (2001) is inserted into the insertion groove (18), only the light column segment (1201) is located in the threaded hole segment (21) of the screw hole.

9. The volleyball spiking net blocker according to claim 1, wherein The push plate (13) has a ﹁-shaped structure, with its horizontal plate segment (1301) being vertically fixed to the back of the wide-side beam (2), and its vertical plate segment (1302) being set downwards; The top end of the elastic telescopic top rod (8) has a tubular shell (22) with an arc-shaped cross-section, which is tangent to the back of the horizontal plate segment (1301) and the wide side beam (2).

10. A method of blocking a spike in a volleyball game, characterized by, The volleyball spike blocker as described in any one of claims 1-9 is used to block spikes. A first pressure sensing element and a second pressure sensing element are respectively provided in the elastic telescopic top rod (8) and the elastic connecting member. During training, the two handles (14) on the left and right sides of the bottom of the net plate are held so that the net plate is upright. When the spiked volleyball is blocked, the quality of the spike is evaluated according to the ratio of the first pressure sensing element to the second pressure sensing element.

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