A snowball projection device and methods of installing and using the same

Abstract

The technical scheme of the present application relates to a snowball throwing device and its installation and use method, the device comprising a base frame, a throwing system, an energy storage system, an adjustment system and a triggering system, wherein the base frame is installed on the bottom. The present application can use a lever and a driving spring to throw a snowball a certain distance, and can use a lead screw to adjust the position of the lock, thereby adjusting the throwing force. In addition, the orientation of the device can be adjusted by the handrail adjustment device to adjust the throwing direction. The present application is a new type of snow sport equipment, which increases the diversity of sports equipment. In addition, the device is designed with a lock, which can be controlled by a key while the lock is triggered by the lock, so as to lock the device and facilitate the management of the device. The use method of the device is flexible and suitable for various occasions. The multiple connection structures designed are detachable structures, which are convenient for maintenance and storage.

Description

Technical Field

[0001] The technical solution of the present invention relates to a snow sports equipment and a method for its installation and use, specifically a snow bullet launching device and a method for its installation and use. Background Technology

[0002] Existing ski resorts have relatively few and insufficient facilities for snow sports and recreation, especially lacking equipment for snow bomb throwing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a snow bullet launching device and its installation and use method, which can launch snow bullets a certain distance and adjust the launching force and direction, thereby increasing the diversity of snow sports equipment and facilitating the management of the device.

[0004] The technical solution adopted by the present invention to solve this technical problem includes a snowball projection device, which includes a base frame, a projection system, an energy storage system, an adjustment system and a triggering system, wherein the base frame is installed at the bottom.

[0005] Furthermore, the base frame includes a chassis, casters, handrails, uprights, subframes, support plates, connecting rods, "T" blocks, gaskets, lower collars, "T" frames, and mounting holes. The chassis is designed as a square frame, with a "T" frame structure welded inside. Multiple lower collars are welded to the longitudinal beams of the "T" frame, arranged longitudinally in a row. A support plate is welded to the lower right side between the crossbeam of the "T" frame and the rear frame of the chassis. The casters are installed at the four corners of the lower side of the chassis. The handrails are made of stainless steel round tubes and designed with an inverted "U" shape. Connecting plates are welded to the two lower ends of the handrails, which are then bolted to the chassis via the two connecting plates. The vertical frame is arranged longitudinally on the left front side. It is designed as an inverted "V" shape with a flat top. The two lower ends of the vertical frame are welded to the front frame of the chassis and the crossbeam of the "T" shaped frame, respectively. There are two vertical frames, which are arranged side by side with a distance between them. The top of the vertical frame is provided with mounting holes. The auxiliary frame is designed as an inverted "U" shaped structure. An inverted "U" shaped groove is formed in the center of the auxiliary frame. The two lower ends of the auxiliary frame are welded to the rear frame of the chassis. The auxiliary frame is tilted forward. A connecting rod is welded between the auxiliary frame and the vertical frame. An inverted "T" shaped block is welded to the inner side of the top of the auxiliary frame. The horizontal surface of the "T" shaped block is at a 45-degree angle to the horizontal plane. A gasket is glued to the horizontal surface of the "T" shaped block.

[0006] Furthermore, the projection system includes a mounted bearing, a rotating shaft, a lever, an extension rod, a magazine, a hanging ring, a drive spring, upper collars, slots, and retaining rings. Two mounted bearings are provided, each bolted to the top of one of the two uprights via mounting holes, maintaining coaxial alignment. The lever is made of a hollow square tube, with a rotating shaft fixedly mounted through its center. The outer diameter of the rotating shaft matches the inner diameter of the mounted bearing. The inner rings of the mounted bearings are inserted into both sides of the rotating shaft. Slots are provided on both sides of the rotating shaft, and two retaining rings are correspondingly engaged in these slots, ensuring the inner side of the retaining rings is tightly pressed against the outer side of the mounted bearing. Multiple upper collars are welded to the lower front end of the lever. The upper collars are arranged longitudinally in a row. A hanging ring is welded to the lower rear end of the lever. The rear end of the lever has a through-hole connection hole. The rear end of the lever extends into the inverted "U"-shaped groove of the attachment. The extension rod is made of hollow square tube. The front end of the extension rod has a through-hole connection hole. The front end of the extension rod is nested inside the rear end of the lever. The extension rod and the lever are fixed together by bolts through the connection hole. The extension rod and the lever are tightly connected. A magazine is welded to the rear end of the extension rod. The magazine is designed as a truncated, bottomed hollow cylinder with the opening facing forward. Both ends of the drive spring are bent tightly. One end of the drive spring is fitted into the upper collar, and the other end of the drive spring is fitted into the lower collar.

[0007] Furthermore, the energy storage system includes a pull rope, pull ring, protective casing, storage spring, pulley A, pulley B, clamp A, clamp B, clamp C, pulley C, and handle. Pulley A is fixedly welded to the inner center of the rear frame of the chassis and located below the hanging ring. Pulley B is welded to the intersection of the right frame of the chassis and the "T"-shaped crossbeam and located behind the "T"-shaped crossbeam. Both pulleys A and B are located on the upper side of the support plate, facing each other. The lower part of the protective casing is designed as a hollow cylinder, and the upper part is designed as a curved hollow cylinder. The lower end of the protective casing is welded to the upper surface of the chassis and located directly above pulley B. The upper opening of the protective casing faces to the right rear. Pulley C is welded to the inner wall of the upper part of the protective casing and located on the lower side, with pulley C facing diagonally upwards. The handle is... There are two handles, one on each side of the upper part of the protective sleeve and both located outside the sleeve. One end of the pull rope passes through the hanging ring on the lever and then is tightened into a loop by the clamp A, forming a loop connection with the hanging ring. The other end of the pull rope passes through pulley A and pulley B in sequence, extends into the sleeve, passes over the upper side of pulley C, and extends out of the sleeve from the top. Then, the other end of the pull rope continues to pass through the semi-circular hollow sleeve and is tightened into a pull ring by the clamp B. The pull rope between pulley A and pulley B is located above the support plate. The storage spring is designed with a single loop at both ends and a bent structure. The storage spring is vertically located inside the sleeve. The lower end of the storage spring is welded to the inner wall of the lower part of the sleeve, and the upper end of the storage spring is fixedly connected to the pull rope by the clamp C.

[0008] Furthermore, the adjustment system includes a guide plate, lead screw support A, lead screw support B, lead screw, coupling, crank handle, and bearing housing. The guide plate is designed in a "U" shape and is bolted to the upper part of the left support of the auxiliary frame. A groove of uniform thickness is formed between the lower surface of the guide plate and the upper surface of the auxiliary frame. Lead screw support A is bolted to the lower left side of the left support of the auxiliary frame, and lead screw support B is bolted to the upper middle left side of the left support of the auxiliary frame. The lower end of the lead screw is connected to lead screw support A, and the upper end of the lead screw passes through lead screw support B and connects to the coupling. The lower end is fixedly connected, and the lead screw can rotate freely under the support of lead screw support A and lead screw support B. The bearing with seat is fixed to the upper left side of the auxiliary frame left support by bolts. The crank handle consists of a rocker arm, a sleeve, and a baffle. The rocker arm is designed in a "Z" shape. The upper end of the rocker arm is equipped with a sleeve, and baffles are provided on both the upper and lower sides of the sleeve. Both baffles are welded to the rocker arm. The sleeve can rotate freely at the upper end of the rocker arm. The lower end of the rocker arm passes through the inner hole of the bearing with seat and is fixedly connected to the upper end of the coupling. The lead screw can rotate under the drive of the crank handle.

[0009] Furthermore, the triggering system includes a lock, a trigger rope, and a locking head D. The lock includes a lock body, a hook plate, a boss, a beveled bolt, a cylindrical bolt, a pull rod, a key, a pull hole, and a screw nut. The lock body is designed as a flat rectangle. The right side of the lock body has a downward-extending hook plate with a thin-walled structure. The top of the lock body has a cylindrical boss with a central insertion hole. The right side of the lock body has a beveled bolt that automatically pops out, with the bevel facing upwards. The beveled bolt retracts into the lock body when the pull rod is pulled to the left. When the pull rod's tension disappears, it automatically resets, and the beveled bolt automatically pops out of the lock body. The end of the pull rod has a pull hole. The right side of the lock body also has a cylindrical bolt. After inserting the key into the insertion hole, rotating the key controls the cylindrical bolt to extend out of the lock body. After inserting the key into the insertion hole, rotating the key also controls the cylindrical bolt to fully retract into the lock body. A screw nut is welded to the left side of the lower surface of the lock.

[0010] The right side of the lock is installed in the groove of the guide plate and the auxiliary frame. The left side of the hook plate is in contact with the inner side of the left support of the auxiliary frame. The boss of the lock is inclined upward and the right side of the boss is in contact with the left side of the guide plate. The screw nut on the lower surface of the lock is engaged with the screw. The lock can slide up and down in the groove formed by the guide plate and the auxiliary frame along the direction of the guide plate under the rotation of the screw. The inclined surface of the inclined bolt faces upward. The inclined bolt can block the rear end of the lever from rotating upward around the axis. The cylindrical bolt that extends out of the lock body by rotating the key can block the lever from rotating around the axis. The right end of the trigger rope passes through the pull hole and is tightened with itself through the clasp D. The right end of the trigger rope forms a loop connection with the pull rod. The trigger rope can control the inclined bolt to retract into the lock body by pulling the pull rod to the left. The left end of the trigger rope extends to the left a certain distance and is placed freely after exceeding the left boundary of the chassis.

[0011] In the aforementioned snowball launching device, the two uprights are arranged side by side with a distance of 60 mm between them, and the width of the inverted "U"-shaped groove of the auxiliary frame is 60 mm.

[0012] In the aforementioned snowball launching device, there are 7 lower collars and 5 upper collars.

[0013] In the aforementioned snowball projectile device, the outer diameter of the rotating shaft and the inner diameter of the bearing with a mounting seat are matched as follows: nominal diameter 25 mm, fitting accuracy H7 / K6.

[0014] In the aforementioned snowball projectile device, the upper part of the protective cylinder is designed as a curved hollow cylinder, with a specific curvature of 45 degrees.

[0015] In the aforementioned snowball launching device, the lever is made of a hollow square tube, wherein the outer dimensions of the cross-section of the hollow square tube are 50 mm × 50 mm.

[0016] In the aforementioned snow bullet throwing device, pulleys A, B, and C are all fixed pulleys with their own frames, and pulleys A, B, and C are all welded together through their supports.

[0017] In the aforementioned snowball projectile device, a lock hole is designed on the left side of the lever. The lock hole is an elongated oval hole, and its position allows the cylindrical latch to extend and fit precisely into the lock hole.

[0018] The technical solution adopted by the present invention to solve the aforementioned technical problem also includes an installation method for a snowball projectile device. The method includes an installation method for a drive spring and an installation method for a storage spring. The installation of the drive spring precedes the installation of the storage spring. The installation method for the drive spring includes the following steps.

[0019] The first step is to rotate the upper end of the drive spring and fit it onto the upper collar on the lever.

[0020] The second step is to rotate the lower end of the drive spring into the lower ring on the chassis. During the rotation, the lever rotates together to avoid rotational stress after the drive spring is installed.

[0021] The third step is to install the two bearings with seats on the left and right sides of the lever and fix them with snap rings.

[0022] The fourth step is to install the two seated bearings with bolts through the mounting holes onto the tops of the two uprights. Adjust the position of the bolts and mounting holes so that the lever is located between the two uprights and that the rotation surface of the lever is parallel to the side of the upright. This completes the installation of the drive spring.

[0023] Furthermore, the installation method for the storage spring includes the following steps.

[0024] First, pass one end of the rope through the hanging ring on the lever and then tighten it with itself through the clamp A to form a loop, thus forming a loop connection with the hanging ring. Then, pass the other end of the rope through pulley A and pulley B in sequence.

[0025] The second step is to securely connect the upper end of the storage spring to the preset position on the pull rope using the clip C.

[0026] Third, the other end of the pull rope continues to extend into the inside of the protective tube, passes over the upper side of pulley C, and extends out of the protective tube from the top. At the same time, the upper end of the storage spring is brought into the inside of the protective tube and kept in a straight state inside the protective tube. Then, the other end of the pull rope continues to pass through the semi-circular hollow protective sleeve and is tightened with itself through the clamp B to form a pull ring.

[0027] The fourth step is to weld the lower end of the storage spring to the inner wall of the lower part of the protective sleeve.

[0028] Fifth, weld the lower end of the protective sleeve to the upper surface of the chassis and place it directly above pulley B to complete the installation of the storage spring.

[0029] The technical solution adopted by the present invention to solve the aforementioned technical problems also includes a method of using a snowball projectile device, which includes the following steps.

[0030] Step 1, Preparation: Based on the site and projection requirements, adjust the connection between the drive spring and the upper collar at the appropriate position, and simultaneously adjust the connection between the drive spring and the lower collar at the appropriate position to initially set the projection distance of the device. Alternatively, multiple drive springs can be added simultaneously to achieve the initial setting of the projection distance. After the device is installed, place it in the designated location on the ski slope. The manager uses a key to turn the cylindrical locking tongue out of the lock body to lock the device. Then, set up a danger zone sign and safety precautions near the device.

[0031] The second step is to obtain the key: The operator applies to the administrator for the key, and the administrator issues the key and records the time of issuance. The equipment can be managed in a way that charges based on usage time or per use.

[0032] The third step is the preparation for launching the attack: The operator sets up one or more targets for the attack, prepares the snowballs, and then uses the key to turn the cylindrical latch into the lock body to unlock the device.

[0033] The fourth step is test firing and energy storage: In the absence of personnel in the danger zone, the operator holds the handle with one hand on the right side of the device and pulls the pull ring with the other hand, which in turn pulls the rear end of the lever downward until the rear end of the lever hits the inclined locking tongue and is blocked under the inclined locking tongue. At this time, the drive spring is in a tensioned state, and at the same time, the storage spring is in a stretched state. Then the operator releases the pull ring and the handle, and the pull rope extending outside the protective tube retracts into the protective tube under the stretch of the storage spring, completing the test firing and energy storage.

[0034] Step 5, Test Firing: First, the operator quickly places the snowball into the magazine. Then, the operator picks up the left end of the trigger rope on the left side of the device and gently pulls the trigger rope to the left. At the same time, the trigger rope causes the inclined locking tongue to retract into the lock body, and the rear end of the lever rotates upward around the pivot under the pull of the drive spring until the lever hits the pad on the horizontal surface of the "T" block. The lever then stops rotating, and the snowball in the magazine is fired forward and upward due to inertia, hitting the vicinity of the target. After the operator releases the trigger rope, the inclined locking tongue automatically pops out, completing the test firing.

[0035] The sixth step is adjustment. The operator makes adjustments based on the positional difference between the point hit during the test and the target. The direction of the shot can be adjusted by using the adjustable device on the handle to adjust the orientation. The energy stored in the drive spring can be adjusted by rotating the crank to move the lock up and down, thereby adjusting the position of the snowball impact point.

[0036] Step 7, Energy Storage: In the absence of personnel in the danger zone, the operator holds the handle with one hand on the right side of the device and pulls the pull ring with the other, which in turn pulls the rear end of the lever downwards until the rear end of the lever hits the inclined locking tongue and is blocked under the inclined locking tongue. At this time, the drive spring is in a tensioned state, and at the same time, the storage spring is in a stretched state. Then the operator releases the pull ring and the handle, and the pull rope extending outside the protective tube retracts into the protective tube under the stretch of the storage spring, completing the energy storage.

[0037] Step 8, Projection: First, the operator quickly places the snow bullet into the magazine. Then, the operator picks up the left end of the trigger rope on the left side of the device and gently pulls the trigger rope to the left. As the trigger rope causes the inclined locking tongue to retract into the lock body, the rear end of the lever rotates upward around the pivot under the pull of the drive spring until the lever hits the pad on the horizontal surface of the "T" block. The lever then stops rotating, and the snow bullet in the magazine is launched forward and upward due to inertia. After the operator releases the trigger rope, the inclined locking tongue automatically pops out, completing the projection.

[0038] Step 9, Judgment: Determine whether the target has been hit. If not, repeat steps 6, 7, 8 and 9 until the target is hit; if hit, proceed to step 10.

[0039] Step 10: Determine if all targets have been hit. If not, proceed to step 11; if yes, proceed to step 12.

[0040] Step 11: Continue throwing; use the next target as the target; then repeat steps 6, 7, 8, and 9.

[0041] Step 12, Record: Record the operation time and the amount of snow bombs consumed.

[0042] Step 13, return the key: The operator uses the key to turn out the cylindrical latch and lock the device; then the key is returned to the manager.

[0043] The components used in the aforementioned snowball launching device are well-known to those skilled in the art and are obtained through publicly known means. The connection methods for these components are also mastered by those skilled in the art.

[0044] Compared with the prior art, the beneficial effects of the snow bomb launching device of the present invention are as follows:

[0045] (1) The present invention can use levers and drive springs to project snow bullets a certain distance, and can use screws to adjust the position of locks, thereby adjusting the projection force; in addition, the direction of projection can be adjusted by adjusting the orientation of the handrail adjustment device.

[0046] (5) As a new type of snow sports equipment, this invention increases the diversity of sports equipment. In addition, the device is designed with a lock. While the lock is used for projection triggering, the lock can also be controlled by a key to lock the device, thus facilitating the management of the device.

[0047] (3) This device is flexible in its use and suitable for various occasions. It can be used by the whole family for role-playing: the child is responsible for triggering the cannon, the mother makes the snowballs and is responsible for loading them, the father operates the pull ring, aims and does other tasks. The whole family can experience the joy of firing, hitting and moving, which is in line with the family travel habits and cultural sentiments in my country. More family members can also participate together and complete different tasks. This device can also be used for sports competitions: the same number of targets and the same throwing distance are specified, and the time and amount of snowballs used to hit all targets are recorded. The one with the shortest time wins. If the time is the same, the one with the less snowballs used wins. It is suitable for individual participation or group participation. The device can also simulate various scenarios: simulating the siege and conquest of ancient warfare, with attackers and defenders taking turns using this device and defensive equipment. Players can control the maximum mass of the snowballs while wearing protective gear to minimize the risk of injury, making it suitable for multiple participants. The device can also be used for performances: employing multiple or high-force drive springs, longer extension rods, and large-volume snowballs pre-colored, multiple players can simultaneously operate the pull rings to store energy. An aerial target is designed; when the snowball hits the target, it explodes, scattering colorful snowflakes. Multiple devices can continuously project different colored snowballs at the same target, creating a beautiful visual spectacle for viewers.

[0048] (4) The multiple connection structures designed in this invention are detachable, which makes it convenient to disassemble when the device is not in use, reducing the storage space occupied, and also making it convenient to repair and replace parts. Attached Figure Description

[0049] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0050] Figure 1 This is a schematic diagram of the structure of a snowball projectile device of the present invention in its natural state.

[0051] Figure 2 This is a schematic diagram of the energy storage state of a snow bomb launching device according to the present invention.

[0052] Figure 3 This is a schematic diagram of the base frame.

[0053] Figure 4 This is a schematic diagram of the cross-sectional structure at the "T"-shaped block.

[0054] Figure 5 This is a schematic diagram of the installation structure of the projection system in its natural state.

[0055] Figure 6 This is a schematic diagram of the projection system in energy storage mode.

[0056] Figure 7 This is a schematic diagram of a lever.

[0057] Figure 8 This is a schematic diagram of the extension rod.

[0058] Figure 9 This is an enlarged schematic diagram of the shaft mounting area.

[0059] Figure 10 This is a schematic diagram of an energy storage system.

[0060] Figure 11 This is a schematic diagram of the energy storage system from the left rear view.

[0061] Figure 12 This is a schematic diagram of the upper part of the casing.

[0062] Figure 13 This is a schematic diagram of the connection between the pull rope and the hanging ring.

[0063] Figure 14 This is a cross-sectional schematic diagram of the internal structure of the casing.

[0064] Figure 15 This is a schematic diagram of the structure for housing the spring.

[0065] Figure 16 This is a schematic diagram of the guide plate.

[0066] Figure 17 This is a schematic diagram of the crank handle.

[0067] Figure 18A schematic diagram of the installation structure for adjusting the system.

[0068] Figure 19 This is a schematic diagram of the front structure of the lock.

[0069] Figure 20 This is a schematic diagram of the back structure of the lock.

[0070] Figure 21 This is a schematic diagram showing the structure of the lock where the beveled bolt and cylindrical bolt are fully retracted into the lock body.

[0071] Figure 22 This is a schematic diagram of the installation structure for the trigger system.

[0072] Figure 23 This is a schematic diagram of a lever structure that is only blocked by a beveled locking tongue.

[0073] Figure 24 This is a schematic diagram showing the structure of the beveled latch and the cylindrical latch fully retracted into the lock body.

[0074] Figure 25 This is a schematic diagram of the structure when the cylindrical bolt is fully retracted into the lock body and the beveled bolt automatically pops out.

[0075] Figure 26 A schematic diagram of a structure in which the cylindrical bolt extends out of the lock body and the lever is blocked by the cylindrical bolt.

[0076] Figure 27 This is a schematic diagram of a lock that slides upwards a certain distance along the guide plate.

[0077] Figure 28 A schematic diagram of a lever with a keyhole.

[0078] Figure 29 This is a schematic diagram of a danger zone marking for a snowball projectile device according to the present invention.

[0079] Figure 30 This is a flowchart illustrating a method of using a snowball launching device according to the present invention.

[0080] In the diagram: 1. Base frame, 2. Projection system, 3. Energy storage system, 4. Adjustment system, 5. Triggering system, 10. Chassis, 11. Casters, 12. Handrail, 13. Upright frame, 14. Subframe, 15. Support plate, 16. Linkage rod, 17. "T" block, 18. Shim, 19. Lower collar, 110. "T" frame, 111. Mounting hole, 20. Bearing with seat, 21. Shaft, 22. Lever, 23. Extension rod, 24. Magazine, 25. Hanging ring, 26. Drive spring, 27. Upper collar, 28. Slot, 29. Snap ring, 210. Locking hole, 30. Pull rope, 31. Pull ring, 32. Protective sleeve 33. Storage spring, 34. Pulley A, 35. Pulley B, 36. Collar A, 37. Collar B, 38. Pulley C, 39. Handle, 310. Collar C, 40. Guide plate, 41. Lead screw support A, 42. Lead screw support B, 43. Lead screw, 44. Bearing with seat, 45. Coupling, 46. Crank handle, 47. Crank arm, 48. Sleeve, 49. Baffle, 50. Lock, 51. Lock body, 52. Hook plate, 53. Boss, 54. Angled latch, 55. Cylindrical latch, 56. Pull rod, 57. Key, 58. Pull hole, 59. Lead screw nut, 510. Collar D, 511. Trigger rope. Detailed Implementation

[0081] Figure 1-2 As shown, the snowball launching device of the present invention includes a base frame 1, a launching system 2, an energy storage system 3, an adjustment system 4, and a triggering system 5. The base frame 1 is installed at the bottom and serves to support the entire device. The launching system 2 is used to launch snowballs. The energy storage system 3 provides energy for the launching system 2. The adjustment system 4 is used to adjust the amount of energy stored in the energy storage system 3, thereby adjusting the launching distance of the snowballs. The triggering system 5 is used to trigger the launching system 2 to launch snowballs.

[0082] Figure 3-4As shown, the base frame 1 includes a chassis 10, casters 11, handrails 12, uprights 13, subframes 14, support plates 15, connecting rods 16, "T" blocks 17, gaskets 18, lower collars 19, "T" brackets 110, and mounting holes 111. The chassis 10 is designed as a square frame, and a "T" bracket 110 structure is welded inside the chassis 10. The "T" bracket 110 is used to strengthen the chassis 10 and provide support for other parts. Multiple lower collars 19 are welded to the longitudinal beams of the "T" bracket 110, and the multiple lower collars 19 are arranged longitudinally and one The drive spring 26 is arranged in a column. The lower collar 19 connects to the lower end of the drive spring 26. Different lower collars 19 can be used to adjust the maximum tension of the drive spring 26. A support plate 15 is welded to the lower right side between the crossbeam of the "T"-shaped frame 110 and the rear frame of the chassis 10. The support plate 15 prevents parts above from falling off. Casters 11 are installed at the four corners of the lower side of the chassis 10. The casters 11 are used for movement of the entire device. The handrail 12 is a stainless steel round tube designed with an inverted "U" shape. Connecting plates are welded to both lower ends of the handrail 12. Handrail 12 is bolted to the left front side of chassis 10 via two connecting plates and is arranged longitudinally. Handrail 12 is used to adjust the orientation of the entire device and can also be used to push the device for short distances. The upright frame 13 is designed as a flat-topped inverted "V" shape. The two lower ends of the upright frame 13 are welded to the front frame of chassis 10 and the crossbeam of "T"-shaped frame 110, respectively. There are two upright frames 13, arranged side-by-side with a distance between them. The top of the upright frame 13 has mounting holes 111. The upright frame 13 is used to support lever 22 and auxiliary frame. 14 is designed as an inverted "U" shaped structure. An inverted "U" shaped groove is formed in the center of the subframe 14. The two lower ends of the subframe 14 are welded to the rear frame of the chassis 10. The subframe 14 is tilted forward. A connecting rod 16 is welded between the subframe 14 and the upright frame 13. An inverted "T" shaped block 17 is welded to the inner side of the top of the subframe 14. The horizontal surface of the "T" shaped block 17 maintains a 45-degree angle with the horizontal plane. The "T" shaped block 17 is used to prevent the continuous rotation of the lever 22. A gasket 18 is glued to the horizontal surface of the "T" shaped block 17. The gasket 18 is used to reduce the impact force when the lever 22 rotates.

[0083] Figure 5-9As shown, the projection system 2 includes a mounted bearing 20, a rotating shaft 21, a lever 22, an extension rod 23, a magazine 24, a hanging ring 25, a drive spring 26, an upper collar 27, a retaining groove 28, and a retaining ring 29. Two mounted bearings 20 are provided, each bolted to the top of one of the two uprights 13 via mounting holes 111. The two mounted bearings 20 are coaxially arranged and support the lever 22, which is made of a hollow square tube. A rotating shaft 21, extending through the lever 22 from left to right, is fixedly installed in the middle of the lever 22. The outer diameter of the rotating shaft 21 is perpendicular to the axis of the mounted bearing 20. The inner diameter of the bearing is matched, and the inner rings of the bearing 20 are inserted into both sides of the rotating shaft 21. Both sides of the rotating shaft 21 are provided with slots 28, and two retaining springs 29 are correspondingly engaged in the two slots 28, keeping the inner side of the retaining springs 29 tightly against the outer side of the bearing 20. The retaining springs 29 are used to fix the rotating shaft 21 to prevent axial movement. The rear end of the lever 22 extends into the inverted "U"-shaped groove of the bracket 14. The lever 22 can rotate through the rotating shaft 21. When the rear end of the lever 22 rotates to the horizontal surface of the "T"-shaped block 17, it reaches its upper limit of rotation. At this time, the angle between the lever 22 and the horizontal plane is 45 degrees. The upper surface is parallel to and fits against the transverse surface of the "T"-shaped block 17. Multiple upper collars 27 are welded to the lower front end of the lever 22. These upper collars 27 are arranged longitudinally in a row. The upper collars 27 are used to connect to the upper end of the drive spring 26. Connecting different upper collars 27 to the drive spring 26 can adjust its maximum tension. A hanging ring 25 is welded to the lower rear end of the lever 22. The hanging ring 25 is used to connect the pull rope 30. The rear end of the lever 22 has a through-hole connection hole. The extension rod 23 is made of a hollow square tube. The front end of the extension rod 23 has a through-hole connection hole. The front end is nested inside the rear end of the lever 22. The extension rod 23 and the lever 22 are fixed together by bolts through the connecting hole. The extension rod 23 is tightly connected to the lever 22. The extension rod 23 is used to lengthen the projection lever arm. The rear end of the extension rod 23 is welded with a shell compartment 24. The shell compartment 24 is used to hold snow bombs. The shell compartment 24 is designed as a truncated bottom hollow cylinder. The opening of the shell compartment 24 faces forward, which is conducive to the snow bomb being thrown. Both ends of the drive spring 26 are bent tightly to facilitate installation. One end of the drive spring 26 is fitted inside the upper collar 27, and the other end of the drive spring 26 is fitted inside the lower collar 19.

[0084] Figure 10-15As shown, the energy storage system 3 includes a pull rope 30, a pull ring 31, a protective sleeve 32, a storage spring 33, pulleys A34 and B35, a clamp A36, a clamp B37, a clamp C310, a pulley C38, and a handle 39. Pulley A34 is fixedly welded to the inner center of the rear frame of the chassis 10 and located below the hanging ring 25. Pulley B35 is welded to the intersection of the right frame of the chassis 10 and the crossbeam of the "T"-shaped frame 110 and located behind the crossbeam of the "T"-shaped frame 110. Both pulleys A34 and B35 are located above the support plate 15, which prevents the pull rope 30 from sliding down to the ground and causing danger. Pulleys A34 and B35 are arranged facing each other. The rolling element of pulley B35 can rotate freely. Pulleys A34 and B35 are used to guide the direction of the pull rope 30 and reduce friction. The lower part of the protective cylinder 32 is designed as a hollow cylinder, and the upper part of the protective cylinder 32 is designed as a curved hollow cylinder. The curved structure is conducive to ergonomic pulling of the pull ring 31. The lower end of the protective cylinder 32 is welded to the upper surface of the chassis 10 and is located directly above pulley B35. The upper opening of the protective cylinder 32 faces to the right rear, which is conducive to applying pulling force to the pull ring 31. The protective cylinder 32 can be used to store the pull rope 30. Pulley C38 is welded to the inner wall of the upper part of the protective cylinder 32 and is located on the lower side. Pulley C38 faces diagonally upward, and the rolling element of pulley C38 can rotate freely. The pulley C38 is used to reduce friction between the pull rope 30 and the protective cylinder 32. Two handles 39 are provided, welded to the left and right sides of the upper part of the protective cylinder 32 respectively, both located outside the protective cylinder 32. The handles 39 facilitate the operator's pulling of the pull ring 31, and the two handles 39 are convenient for operators accustomed to using their left and right hands respectively. One end of the pull rope 30 passes through the hanging ring 25 on the lever 22 and then tightens itself into a loop via the clamp A36, forming a loop connection with the hanging ring 25. The other end of the pull rope 30 passes through pulleys A34 and B35 in sequence, extends into the interior of the protective cylinder 32, and then passes over the upper side of pulley C38, extending out from the upper end of the protective cylinder 32. The other end of the pull rope 30 passes through the semi-circular hollow sheath and is then tightened with itself via the clamp B37 to form a pull ring 31. The pull rope 30 is used to pull the rear end of the lever 22 to rotate downwards. The pull rope 30 between pulleys A34 and B35 is positioned above the support plate 15. The storage spring 33 is designed with a single loop and bent structure at both ends. The storage spring 33 is vertically positioned inside the sheath 32. The lower end of the storage spring 33 is welded to the inner wall of the lower part of the sheath 32. The upper end of the storage spring 33 is fixedly connected to the pull rope 30 via the clamp C310. The storage spring 33 is used to automatically store the pull rope 30 inside the sheath 32 to prevent the pull rope 30 from spilling out and causing danger.

[0085] Figure 16-18As shown, the adjustment system 4 includes a guide plate 40, a lead screw support A41, a lead screw support B42, a lead screw 43, a coupling 45, a crank handle 46, and a bearing 44 with a seat. The guide plate 40 is designed in a "U" shape and is fixed to the upper part of the left support of the subframe 14 by bolts. A groove of uniform thickness is formed between the lower surface of the guide plate 40 and the upper surface of the subframe 14, which provides a guide for the movement of the lock 50. The lead screw support A41 is fixed to the lower left side of the left support of the subframe 14 by bolts, and the lead screw support B42 is fixed to the upper middle left side of the left support of the subframe 14 by bolts. The lower end of the lead screw 43 is connected to the lead screw support A41, and the upper end of the lead screw 43 passes through the lead screw support B42 and is fixedly connected to the lower end of the coupling 45. The lead screw 43 can move freely under the support of the lead screw supports A41 and B42. The rotating bearing 44 is fixed to the upper left side of the left support of the auxiliary frame 14 by bolts. The bearing 44 provides support for the crank handle 46, which consists of a rocker arm 47, a sleeve 48, and a baffle 49. The rocker arm 47 is designed in a "Z" shape. The upper end of the rocker arm 47 is provided with a sleeve 48, and baffles 49 are provided on both the upper and lower sides of the sleeve 48. Both baffles 49 are welded to the rocker arm 47. The baffles 49 are used to limit the axial movement of the sleeve 48. The sleeve 48 can rotate freely at the upper end of the rocker arm 47. The sleeve 48 facilitates the operator to rotate the crank handle 46. The lower end of the rocker arm 47 passes through the inner hole of the bearing 44 and is fixedly connected to the upper end of the coupling 45. The bearing 44, the lead screw support A41, and the lead screw support B42 are arranged coaxially. The lead screw 43 can rotate under the drive of the crank handle 46.

[0086] Figure 19-21 As shown, the lock 50 includes a lock body 51, a hook plate 52, a boss 53, a beveled bolt 54, a cylindrical bolt 55, a pull rod 56, a key 57, a pull hole 58, and a lead screw nut 59. The lock body 51 is designed as a flat rectangle, and its thickness is slightly less than the thickness of the groove between the guide plate 40 and the auxiliary frame 14. A downward-extending hook plate 52 is designed on the right side of the lock body 51; the hook plate 52 has a thin-walled structure. A boss 53 is designed on the top of the lock body 51; the boss 53 is cylindrical, and a hole is designed in the center of the boss 53. A beveled bolt 54, which automatically ejects the lock body 51, is designed on the right side of the lock body 51. The beveled bolt 54... With the face facing upward, the beveled latch 54 can retract into the lock body 51 when the lever 56 is pulled to the left. When the pulling force of the lever 56 is removed, the lever 56 automatically resets and the beveled latch 54 automatically pops out of the lock body 51. The end of the lever 56 is designed with a pull hole 58. The right side of the lock body 51 is also designed with a cylindrical latch 55. After the key 57 is inserted into the socket, rotating the key 57 can control the cylindrical latch 55 to extend out of the lock body 51. After the key 57 is inserted into the socket, rotating the key 57 can also control the cylindrical latch 55 to retract completely into the lock body 51. A lead screw nut 59 is welded to the left side of the lower surface of the lock 50. The lead screw nut 59 is used to drive the lock 50 to move up and down.

[0087] Figure 22-27 As shown, the triggering system 5 includes a lock 50, a trigger rope 511, and a locking head D510. The right side of the lock 50 is installed in the groove of the guide plate 40 and the auxiliary frame 14. The left side of the hook plate 52 is attached to the inner side of the left support of the auxiliary frame 14. The hook plate 52 is used to restrict the lock body 51 from moving to the left. The boss 53 of the lock 50 is inclined upward and the right side of the boss 53 is attached to the left side of the guide plate 40. The boss 53 is used to restrict the lock body 51 from moving to the right. The screw nut 59 on the lower surface of the lock 50 is engaged with the screw 43. The lock 50 can slide up and down in the groove formed by the guide plate 40 and the auxiliary frame 14 along the direction of the guide plate 40 under the rotation of the screw 43. The inclined surface of the inclined locking tongue 54 faces obliquely upward. The inclined locking tongue 54 can quickly and automatically retract under the downward rotational impact of the rear of the lever 22. After the lever 22 passes, it will quickly and automatically pop out again. The inclined locking tongue 54 can block The rear end of lever 22 rotates upward around pivot 21. The cylindrical latch 55, which extends out of lock body 51 via key 57, can prevent lever 22 from rotating around pivot 21. The right end of trigger rope 511 passes through pull hole 58 and is tightened with itself via latch D510. The right end of trigger rope 511 forms a loop connection with pull rod 56. Trigger rope 511 can control the beveled latch 54 to retract into lock body 51 by pulling pull rod 56 to the left. The left end of trigger rope 511 extends to the left and is placed freely beyond the left boundary of chassis 10. The left end of trigger rope 511 is pulled by the operator, which in turn drives the beveled latch 54 to retract into lock body 51. When beveled latch 54 retracts, lever 22, which is blocked below beveled latch 54, can quickly resume its upward rotation around pivot 21 under the pull of drive spring 26, and snow bullets located in bullet compartment 24 can be rapidly accelerated.

[0088] Figure 29 The diagram shows a dangerous area marking of a snowball projectile device according to the present invention. The diagram is marked with a thick dashed line from a top view. This area is where danger is likely to occur during the operation of the device. The operator must ensure safety before extending his body into this area. Example

[0089] According to the above Figures 1-27As shown, the above-mentioned snowball projectile device is manufactured, wherein the two uprights 13 are arranged side by side with a distance of 60 mm between them, and the inverted "U"-shaped groove of the auxiliary frame 14 has a groove width of 60 mm; there are 7 lower collars 19 and 5 upper collars 27; the outer diameter of the rotating shaft 21 matches the inner diameter of the bearing 20 with a nominal diameter of 25 mm and a fitting accuracy of H7 / K6; the upper part of the protective cylinder 32 is designed as a curved hollow cylinder with a specific curvature of 45 degrees; the lever 22 is made of a hollow square tube with an outer dimension of 50 mm × 50 mm; in the above-mentioned snowball projectile device, pulleys A34, B35 and C38 are all fixed pulleys with their own frames, and pulleys A34, B35 and C38 are all welded together through their supports.

[0090] The installation methods for some key components are as follows.

[0091] A method for installing a snowball projectile device includes a method for installing a drive spring 26 and a method for installing a storage spring 33, wherein the installation of the drive spring 26 precedes the installation of the storage spring 33, and the method for installing the drive spring 26 includes the following steps.

[0092] The first step is to rotate the upper end of the drive spring 26 and fit it onto the upper collar 27 on the lever 22.

[0093] The second step is to rotate the lower end of the drive spring 26 into the lower collar 19 on the chassis 10. During the rotation, the lever 22 rotates together to avoid rotational stress after the drive spring 26 is installed.

[0094] The third step is to install the two bearings 20 on the left and right sides of the lever 22 on the rotating shafts 21 respectively, and fix them with snap rings 29 respectively.

[0095] Fourth step: Install the two seated bearings 20 with bolts through the mounting holes 111 on the top of the two uprights 13. Adjust the position of the bolts and the mounting holes 111 so that the lever 22 is located in the middle of the two uprights 13 and the rotation surface of the lever 22 is parallel to the side of the upright 13, thus completing the installation of the drive spring 26.

[0096] Furthermore, the installation method for the storage spring 33 includes the following steps.

[0097] First, pass one end of the pull rope 30 through the hanging ring 25 on the lever 22 and then tighten it with itself through the clamp A36 to form a loop, thereby forming a loop connection with the hanging ring 25. Then, pass the other end of the pull rope 30 through the pulley A34 and pulley B35 in sequence.

[0098] The second step is to fix the upper end of the storage spring 33 to the preset position on the pull rope 30 via the clip C310.

[0099] Third, the other end of the pull rope 30 continues to extend into the inside of the protective sleeve 32, passes over the upper side of the pulley C38, and extends out of the protective sleeve 32 from the upper end of the protective sleeve 32. At the same time, the upper end of the storage spring 33 is brought into the inside of the protective sleeve 32 and the storage spring 33 is kept in a straight state inside the protective sleeve 32. Then, the other end of the pull rope 30 continues to pass through the semi-circular hollow protective sleeve and is tightened with itself through the clamp B37 to form a pull ring 31.

[0100] The fourth step is to weld the lower end of the storage spring 33 to the inner wall of the lower part of the protective sleeve 32.

[0101] Fifth step, weld the lower end of the protective sleeve 32 to the upper surface of the chassis 10 and place it directly above the pulley B35 to complete the installation of the storage spring 33.

[0102] like Figure 30 As shown, a method of using a snowball launching device includes the following steps.

[0103] Step 1, Preparation: Based on the site and projection requirements, adjust the connection between the drive spring 26 and the upper collar 27 at the appropriate position, and simultaneously adjust the connection between the drive spring 26 and the lower collar 19 at the appropriate position to achieve the initial setting of the projection distance of the device. The initial setting of the projection distance of the device can also be achieved by simultaneously installing multiple drive springs 26. After the device is installed, place it in the predetermined location in the ski resort. The manager uses the key 57 to turn the cylindrical locking tongue 55 out of the lock body 51 to lock the device. Then, set up a danger zone sign and safety precautions near the device.

[0104] The second step is to obtain the key: The operator applies to the administrator for the use of key 57. The administrator issues key 57 and records the issuance time. The equipment can be managed in a way that charges based on usage time or per use.

[0105] The third step is to prepare for the launch: The operator sets up one or more targets for the launch attack, prepares the snowballs, and then uses key 57 to turn the cylindrical locking tongue 55 into the lock body 51 to unlock the device.

[0106] Step 4, test firing and energy storage: In the absence of personnel in the danger zone, the operator holds the handle 39 with one hand on the right side of the device and pulls the pull ring 31 with the other hand, which in turn pulls the rear end of the lever 22 downward until the rear end of the lever 22 hits the inclined locking tongue 54 and is blocked under the inclined locking tongue 54. At this time, the drive spring 26 is in a tensioned state, and at the same time, the storage spring 33 is in a stretched state. Then the operator releases the pull ring 31 and the handle 39, and the pull rope 30 extending outside the protective tube 32 retracts into the protective tube 32 under the stretch of the storage spring 33, completing the test firing and energy storage.

[0107] Step 5, test firing: First, the operator quickly places the snow bullet into the magazine 24. Then, the operator picks up the left end of the trigger rope 511 on the left side of the device and gently pulls the trigger rope 511 to the left. At the same time, the trigger rope 511 causes the inclined locking tongue 54 to retract into the lock body 51. Under the pull of the drive spring 26, the rear end of the lever 22 rotates upward around the pivot 21 until the lever 22 hits the pad 18 on the horizontal surface of the "T" block 17. The lever 22 then stops rotating, and the snow bullet in the magazine 24 is fired forward and upward due to inertia and hits the vicinity of the target. After the operator releases the trigger rope 511, the inclined locking tongue 54 automatically pops out, completing the test firing.

[0108] The sixth step is adjustment. The operator makes adjustments based on the positional difference between the point hit during the test shot and the target. The direction of the shot can be adjusted by adjusting the device on the handle 12, and the energy stored in the drive spring 26 can be adjusted by rotating the crank 46 to move the lock 50 up and down, thereby adjusting the position of the snowball hit point.

[0109] Step 7, energy storage: In the absence of personnel in the danger zone, the operator holds the handle 39 on the right side of the device with one hand and pulls the pull ring 31 with the other, which in turn pulls the rear end of the lever 22 downward until the rear end of the lever 22 hits the inclined locking tongue 54 and is blocked under the inclined locking tongue 54. At this time, the drive spring 26 is in a tensioned state, and at the same time, the storage spring 33 is in a stretched state. Then the operator releases the pull ring 31 and the handle 39, and the pull rope 30 extending outside the protective tube 32 retracts into the protective tube 32 under the stretch of the storage spring 33, completing the energy storage.

[0110] Step 8, Projection: First, the operator quickly places the snow bullet into the magazine 24. Then, the operator picks up the left end of the trigger rope 511 on the left side of the device and gently pulls the trigger rope 511 to the left. At the same time, the trigger rope 511 causes the inclined locking tongue 54 to retract into the lock body 51. Under the pull of the drive spring 26, the rear end of the lever 22 rotates upward around the pivot 21 until the lever 22 hits the pad 18 on the horizontal surface of the "T" block 17. The lever 22 then stops rotating, and the snow bullet in the magazine 24 is shot forward and upward due to inertia. After the operator releases the trigger rope 511, the inclined locking tongue 54 automatically pops out, completing the projection.

[0111] Step 9, Judgment: Determine whether the target has been hit. If not, repeat steps 6, 7, 8 and 9 until the target is hit; if hit, proceed to step 10.

[0112] Step 10: Determine if all targets have been hit. If not, proceed to step 11; if yes, proceed to step 12.

[0113] Step 11: Continue throwing; use the next target as the target; then repeat steps 6, 7, 8, and 9.

[0114] Step 12, Record: Record the operation time and the amount of snow bombs consumed.

[0115] Step 13, return key 57: The operator uses key 57 to turn out the cylindrical latch 55 to lock the device; then the key 57 is returned to the manager.

[0116] Example 2, in Example 1 Figure 7 A lock hole 210 is added to the lever 22 shown, and its structure is as follows: Figure 28 As shown, a lock hole 210 is designed on the left side of the lever 22. The lock hole 210 is an elongated hole. The position of the lock hole 210 allows the cylindrical latch 55 to extend and fit into the lock hole 210. The rest of the structure is consistent with Embodiment 1. With the cylindrical latch 55 retracted into the lock body 51, adjust the position of the lever 22 and the lock 50 so that the cylindrical latch 55 is directly opposite the lock hole 210 on the lever 22. Then rotate the key 57 to extend the cylindrical latch 55 and fit into the lock hole 210. Then remove the key 57. The lock 50 is difficult to move because the cylindrical latch 55 is limited by the lock hole 210. At the same time, the lever 22 is difficult to rotate because the lock hole 210 is limited by the cylindrical latch 55. At this time, the device is fully locked.

[0117] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A snowball launching device, comprising a base frame, a launching system, an energy storage system, an adjustment system, and a triggering system, wherein the base frame is mounted at the bottom; characterized in that: The base frame includes a chassis, casters, handrails, uprights, subframes, support plates, connecting rods, "T" blocks, gaskets, lower collars, "T" frames, and mounting holes. The chassis is designed as a square frame, with a "T" frame structure welded inside. Multiple lower collars are welded to the longitudinal beams of the "T" frame, arranged longitudinally in a row. A support plate is welded to the lower right side between the crossbeam of the "T" frame and the rear frame of the chassis. The casters are installed at the four corners of the chassis. The handrails are made of stainless steel round tubes and designed with an inverted "U" shape. Connecting plates are welded to the two lower ends of the handrails, which are then bolted to the front left side of the chassis via the two connecting plates. The frame is arranged laterally and longitudinally. The uprights are designed as flat-topped inverted "V" shapes. The two lower ends of the uprights are welded to the front frame of the chassis and the crossbeam of the "T"-shaped frame, respectively. There are two uprights, which are arranged side by side with a distance between them. The top of the uprights is provided with mounting holes. The sub-frame is designed as an inverted "U" shape with an inverted "U" shaped groove in the center. The two lower ends of the sub-frame are welded to the rear frame of the chassis. The sub-frame is tilted forward. A connecting rod is welded between the sub-frame and the uprights. An inverted "T"-shaped block is welded to the inner side of the top of the sub-frame. The horizontal surface of the "T"-shaped block is at a 45-degree angle to the horizontal plane. A gasket is glued to the horizontal surface of the "T"-shaped block. The projection system includes a mounted bearing, a rotating shaft, a lever, an extension rod, a magazine, a hanging ring, a drive spring, upper collars, slots, and retaining rings. Two mounted bearings are installed, each bolted to the top of one of the two uprights via mounting holes, maintaining coaxial alignment. The lever is made of a hollow square tube, with a rotating shaft fixedly mounted in the center, its outer diameter matching the inner diameter of the mounted bearing. The inner rings of the mounted bearings are inserted into both sides of the rotating shaft. Slots are located on both sides of the rotating shaft, and two retaining rings are correspondingly engaged within these slots, ensuring the inner side of the retaining rings is tightly pressed against the outer side of the mounted bearing. Multiple upper collars are welded to the lower front end of the lever. All rings are arranged longitudinally in a row. A hanging ring is welded to the lower rear end of the lever. The rear end of the lever is provided with a vertically penetrating connecting hole. The rear end of the lever extends into the inverted "U"-shaped groove of the attachment. The extension rod is made of hollow square tube. The front end of the extension rod is provided with a vertically penetrating connecting hole. The front end of the extension rod is nested inside the rear end of the lever. The extension rod and the lever are fixed together by bolts through the connecting hole. The extension rod and the lever are tightly connected. A magazine is welded to the rear end of the extension rod. The magazine is designed as a truncated, bottomed hollow cylinder with the opening facing forward. Both ends of the drive spring are bent tightly. One end of the drive spring is fitted into the upper ring, and the other end of the drive spring is fitted into the lower ring. The energy storage system includes a pull rope, a pull ring, a casing, a storage spring, pulley A, pulley B, chuck A, chuck B, chuck C, pulley C and a grip. Among them, pulley A is fixedly welded to the middle inside of the rear frame of the chassis and is located below the hanging ring. Pulley B is welded at the intersection of the right frame of the chassis and the crossbeam of the "T" - shaped frame and is located at the rear side of the crossbeam of the "T" - shaped frame. Both pulley A and pulley B are located above the support plate, and pulley A and pulley B are arranged facing each other. The lower part of the casing is designed as a hollow cylinder, and the upper part of the casing is designed as a curved hollow cylinder. The lower end of the casing is welded to the upper surface of the chassis and is located directly above pulley B. The upper end opening of the casing faces right - rearward. Pulley C is welded to the inner wall of the upper part of the casing and is located on the lower side. Pulley C faces obliquely upward. There are 2 grips. The two grips are respectively welded to the left and right sides of the upper part of the casing and are both located outside the casing. One end of the pull rope passes through the hanging ring on the lever and is then tightened with itself via chuck A to form a loop, and thus forms a loop connection with the hanging ring. The other end of the pull rope passes through pulley A and pulley B in sequence, then extends into the inside of the casing, bypasses the upper side of pulley C, and extends out of the casing from the upper end of the casing. Then the other end of the pull rope continues to pass through the semi - circular hollow sheath and is tightened with itself via chuck B to form a pull ring. The pull rope between pulley A and pulley B is arranged above the support plate. The storage spring is designed with single - looped and bent ends. The storage spring is arranged vertically inside the casing. The lower end of the storage spring is welded to the inner wall of the lower part of the casing, and the upper end of the storage spring is fixedly connected to the pull rope via chuck C; The adjustment system includes a guide plate, a lead - screw support A, a lead - screw support B, a lead screw, a coupling, a crank and a pedestal bearing. Among them, the guide plate is designed as a "U" - shape. The guide plate is fixed to the upper part of the left support of the accessory frame by bolts. A chute with a uniform thickness is formed between the lower surface of the guide plate and the upper surface of the accessory frame. The lead - screw support A is fixed to the lower left side of the left support of the accessory frame by bolts. The lead - screw support B is fixed to the upper middle part of the left support of the accessory frame by bolts. The lower end of the lead screw is connected to the lead - screw support A, and the upper end of the lead screw passes through the lead - screw support B and is fixedly connected to the lower end of the coupling. The lead screw can rotate freely under the support of the lead - screw support A and the lead - screw support B. The pedestal bearing is fixed to the upper left side of the left support of the accessory frame by bolts. The crank consists of a rocker, a sleeve and a baffle. Among them, the rocker is designed as a "Z" - shape. The upper end of the rocker is provided with a sleeve. Both the upper and lower sides of the sleeve are provided with baffles. The two baffles are both welded to the rocker. The sleeve can rotate freely at the upper end of the rocker. The lower end of the rocker passes through the inner hole of the pedestal bearing and is fixedly connected to the upper end of the coupling. The lead screw can rotate under the drive of the crank; The triggering system includes a lock, a trigger rope, and a locking head D. The lock includes a lock body, a hook plate, a boss, a beveled bolt, a cylindrical bolt, a pull rod, a key, a pull hole, and a screw nut. The lock body is designed as a flat rectangle. The right side of the lock body has a downward-extending hook plate with a thin-walled structure. The top of the lock body has a cylindrical boss with a central insertion hole. The right side of the lock body has a beveled bolt that automatically pops out, with the bevel facing upwards. The beveled bolt retracts into the lock body when the pull rod is pulled to the left. When the pull rod's tension is released, the pull rod automatically resets, and the beveled bolt automatically pops out of the lock body. The end of the pull rod has a pull hole. The right side of the lock body also has a cylindrical bolt. After inserting the key into the insertion hole, rotating the key controls the cylindrical bolt to extend out of the lock body. After inserting the key into the insertion hole, rotating the key also controls the cylindrical bolt to fully retract into the lock body. A screw nut is welded to the left side of the lower surface of the lock. The right side of the lock is installed in the groove of the guide plate and the auxiliary frame. The left side of the hook plate is in contact with the inner side of the left support of the auxiliary frame. The boss of the lock is inclined upward and the right side of the boss is in contact with the left side of the guide plate. The screw nut on the lower surface of the lock is engaged with the screw. The lock can slide up and down in the groove formed by the guide plate and the auxiliary frame along the direction of the guide plate under the rotation of the screw. The inclined surface of the inclined bolt faces upward. The inclined bolt can block the rear end of the lever from rotating upward around the axis. The cylindrical bolt that extends out of the lock body by rotating the key can block the lever from rotating around the axis. The right end of the trigger rope passes through the pull hole and is tightened with itself through the clasp D. The right end of the trigger rope forms a loop connection with the pull rod. The trigger rope can control the inclined bolt to retract into the lock body by pulling the pull rod to the left. The left end of the trigger rope extends to the left a certain distance and is placed freely after exceeding the left boundary of the chassis.

2. The snowball launching device according to claim 1, characterized in that: The two uprights are arranged side by side with a distance of 60 mm between them, and the width of the inverted "U" shaped groove of the auxiliary frame is 60 mm.

3. The snowball launching device according to claim 1, characterized in that: There are 7 lower collars and 5 upper collars.

4. A snowball launching device according to claim 1, characterized in that: The outer diameter of the rotating shaft matches the inner diameter of the bearing with a mounting plate with a nominal diameter of 25 mm and a fitting accuracy of H7 / K6.

5. A snowball launching device according to claim 1, characterized in that: The upper part of the protective sleeve is designed as a curved hollow cylinder, with a specific curvature of 45 degrees.

6. A snowball launching device according to claim 1, characterized in that: The lever is made of a hollow square tube, wherein the outer dimensions of the hollow square tube cross section are 50 mm × 50 mm.

7. A snowball launching device according to claim 1, characterized in that: The pulleys A, B, and C are all fixed pulleys with their own frames, and they are all welded together through their supports.

8. A snowball launching device according to claim 1, characterized in that: The lever has a lock hole on its left side. The lock hole is an oblong hole, and its position allows the cylindrical lock tongue to extend and fit into the lock hole.

9. A method for installing a snowball projectile device according to claim 1, the method comprising a method for installing a drive spring and a method for installing a storage spring, characterized in that: The installation of the drive spring precedes the installation of the storage spring, and the installation method of the drive spring is as follows. Includes the following steps: The first step is to rotate the upper end of the drive spring and fit it onto the upper collar on the lever; The second step is to rotate the lower end of the drive spring into the lower ring on the chassis. During the rotation, the lever rotates together to avoid rotational stress after the drive spring is installed. The third step is to install the two bearings with seats on the left and right sides of the lever and fix them with snap rings respectively; The fourth step is to install the two seated bearings onto the tops of the two uprights using bolts through the mounting holes. Adjust the position of the bolts and mounting holes so that the lever is located between the two uprights and that the rotation surface of the lever is parallel to the side of the upright. This completes the installation of the drive spring. Installation method of storage spring Includes the following steps: First, pass one end of the rope through the hanging ring on the lever and then tighten it with itself through the clamp A to form a loop, thus forming a loop connection with the hanging ring. Then, pass the other end of the rope through pulley A and pulley B in sequence. The second step is to fix the upper end of the storage spring to the preset position on the pull rope using the clip C; The third step is to extend the other end of the pull rope into the inner tube and then pass over the upper side of the pulley C to extend out of the inner tube from the top of the inner tube. At the same time, bring the upper end of the storage spring into the inner tube and keep the storage spring in a straight state inside the inner tube. Then, the other end of the pull rope continues to pass through the semi-circular hollow sleeve and then tightens with itself through the clamp B to form a pull ring. The fourth step is to weld the lower end of the storage spring to the inner wall of the lower part of the protective sleeve; Fifth, weld the lower end of the protective sleeve to the upper surface of the chassis and place it directly above pulley B to complete the installation of the storage spring.

10. A method of using a snowball projectile device according to claim 1, characterized in that: This method Includes the following steps: Step 1, Preparation: Based on the site and projection requirements, adjust the connection between the drive spring and the upper collar at the appropriate position, and simultaneously adjust the connection between the drive spring and the lower collar at the appropriate position to initially set the projection distance of the device. Alternatively, multiple drive springs can be added simultaneously to achieve the same initial projection distance. After installing the device, place it at the designated location on the ski slope. The manager uses a key to turn the cylindrical locking tongue out of the lock body to lock the device. Then, set up a danger zone sign and safety precautions near the device. The second step is to obtain the key: The operator applies to the administrator for the key, the administrator issues the key and records the time of issuance, and the equipment can be managed in a model of charging by usage time or charging per use; The third step is to prepare for the attack: The operator sets up one or more targets for the attack, prepares the snowballs, and then uses the key to turn the cylindrical lock tongue into the lock body to unlock the equipment. Step 4, test firing and energy storage: In the absence of personnel in the danger zone, the operator holds the handle with one hand on the right side of the device and pulls the pull ring with the other hand, which in turn pulls the rear end of the lever downward until the rear end of the lever hits the inclined locking tongue and is blocked under the inclined locking tongue. At this time, the drive spring is in a tensioned state, and at the same time, the storage spring is in a stretched state. Then the operator releases the pull ring and the handle, and the pull rope extending outside the protective tube retracts into the protective tube under the stretch of the storage spring, completing the test firing and energy storage. Step 5, test firing: First, the operator quickly places the snow bullet into the magazine. Then, the operator picks up the left end of the trigger rope on the left side of the device and gently pulls the trigger rope to the left. At the same time, the trigger rope causes the inclined locking tongue to retract into the lock body. Under the pull of the drive spring, the rear end of the lever rotates upward around the pivot until the lever hits the pad on the horizontal surface of the "T" block. The lever then stops rotating, and the snow bullet in the magazine is fired forward and upward due to inertia, hitting the vicinity of the target. After the operator releases the trigger rope, the inclined locking tongue automatically pops out, completing the test firing. The sixth step is adjustment. The operator makes adjustments based on the positional difference between the point hit during the test and the target. The direction of the shot can be adjusted by using the adjustable device on the handle to adjust the orientation. The energy stored in the drive spring can be adjusted by rotating the crank to move the lock up and down, thereby adjusting the position of the snowball impact point. Step 7, energy storage: In the absence of personnel in the danger zone, the operator holds the handle with one hand on the right side of the device and pulls the pull ring with the other, which in turn pulls the rear end of the lever downward until the rear end of the lever hits the inclined locking tongue and is blocked under the inclined locking tongue. At this time, the drive spring is in a tensioned state, and at the same time, the storage spring is in a stretched state. Then the operator releases the pull ring and the handle, and the pull rope extending from the outside of the protective tube retracts into the protective tube under the stretch of the storage spring, completing the energy storage. Step 8, Projection: First, the operator quickly places the snow bullet into the magazine. Then, the operator picks up the left end of the trigger rope on the left side of the device and gently pulls the trigger rope to the left. At the same time, the trigger rope causes the inclined locking tongue to retract into the lock body. Under the pull of the drive spring, the rear end of the lever rotates upward around the pivot until the lever hits the pad on the horizontal surface of the "T" block. The lever stops rotating, and the snow bullet in the magazine is shot forward and upward due to inertia. After the operator releases the trigger rope, the inclined locking tongue automatically pops out, completing the projection. Step 9, Judgment: Determine whether the target has been hit. If not, repeat steps 6, 7, 8, and 9 until the target is hit; if hit, proceed to step 10. Step 10: Determine if all targets have been hit. If not, proceed to step 11; if yes, proceed to step 12. Step 11: Continue throwing; use the next target as the target; then repeat steps 6, 7, 8, and 9. Step 12, Record: Record the operation time and the amount of snow bombs consumed; Step 13, return the key: The operator uses the key to turn out the cylindrical latch and lock the device; then the key is returned to the manager.

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