Suspension type sandbag for martial arts training

Abstract

This invention discloses a suspended martial arts training sandbag, relating to the field of martial arts training equipment technology. It includes a support base and a shape-forming covering body and a directional inertial core supported by an outer suspension assembly and an inner suspension assembly, respectively. The shape-forming covering body has defensive arms on both sides and a chest / rib target plate located behind the defensive arms. The defensive arms are connected to an unlocking locking assembly and a return damping assembly. The chest / rib target plate is connected to a partial stroke slider and a trigger pusher. The partial stroke slider is connected to a trigger locking pin via an enabling cable passing through a fixed guide wheel. A differential trigger swing rod is rotatably mounted on the directional inertial core. The trigger locking pin is inserted into the lock hole of the swing rod. There is a free stroke between the trigger pusher and the swing rod. The swing rod is connected to a shoulder locking tongue via a release cable. This invention, through the sequential coordination of the partial stroke release pin and the relative stroke driving swing rod, allows the defensive arms to return to the defensive position after the chest / rib target plate reaches its release stroke, forming a training method for breaking defenses and continuous striking.

Description

Technical Field

[0001] This invention relates to the field of martial arts training equipment technology, specifically a suspended martial arts training sandbag. Background Technology

[0002] Suspended contoured punching bags typically support a bag with a head and torso outline via a hanging structure. Trainees can practice punching, elbowing, and combination movements targeting different body parts. In break-through and continuous striking training, trainees need to first change the position of the opponent's defending limbs to expose target areas such as the chest and ribs, and then strike the exposed areas while simultaneously responding to the return of the defending limbs to their original position. If the equipment only provides a fixed shape and exposed target area, it is difficult to form a coherent constraint between the above movements, and the training logic of "break-through, exposure, strike, and return" cannot be reflected. If the target area is covered by a movable arm, the open position of the movable arm, the impact on the target area, and the return movement need to be coordinated. In addition, the suspended bag will swing as a whole after being struck, and the local target plate may also undergo relative displacement. If a single displacement trigger structure is used directly, it is easy to confuse the overall movement of the bag with the local displacement of the target plate as the same release signal, resulting in false triggering or asynchronous movements, which affects the repeatability of continuous training.

[0003] To address the aforementioned issues, patent CN111265839B discloses a suspended mannequin sandbag for martial arts training. The sandbag's upper end is supported by a suspension mechanism on a frame, while its lower end is connected via a pull-down and tensioning mechanism. A lifting mechanism adjusts the tension of the lower part. The mannequin sandbag is divided into two parts connected by a universal ball. This design primarily improves upon the sandbag's swing limitation and deformation after being struck. However, its disclosed structure lacks a mechanical linkage between maintaining open defensive limbs, the exposed target area being struck, and the defensive limbs returning to their original position. It also lacks a sequential release structure that distinguishes between local target displacement and overall sandbag movement. Therefore, when used for breaking defenses and continuous striking training, this existing technology still suffers from a disconnect between the defensive body part and the target area's movement, and overall movement interferes with the target area's triggering, making it difficult to meet the requirements of continuous and repeatable training.

[0004] Based on this, we now offer suspended martial arts training sandbags that eliminate the drawbacks of existing devices. Summary of the Invention

[0005] The purpose of this invention is to provide a suspended martial arts training sandbag to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A suspended martial arts training sandbag includes a support frame and a shape-forming cover suspended below it via an external suspension assembly. The shape-forming cover contains a directional inertial core connected to the support frame via an internal suspension assembly. Two penetration linkage components are located on either side of the shape-forming cover. Each penetration linkage component includes a defensive arm rotatably mounted on the shoulder of the shape-forming cover and a chest / rib target plate located behind the defensive arm. The defensive arm is connected to an unlocking and locking assembly and a return damping assembly. The chest / rib target plate is movably mounted on the shape-forming cover via a target plate support ring. A dual-condition release assembly is provided between the chest / rib target plate and the directional inertial core. The dual-condition release assembly includes a differential triggering lever rotatably mounted on the directional inertial core and a triggering pin inserted into the locking hole of the differential triggering lever. The chest / rib target plate is connected to the triggering pin via an enabling cable. The enabling cable passes around a fixed reversing guide wheel mounted on the target plate support ring. The chest / rib target plate is also connected to a trigger pusher spaced opposite to the differential triggering lever. The differential triggering lever is connected to the unlocking and locking assembly via a release cable.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions: In one alternative: the external suspension assembly is connected to the shoulder bearing ring, the shoulder bearing ring is connected to the lower bearing ring via a longitudinal bearing belt, the directional inertial core is connected to the bearing hanger via two parallel straps, the front side of its bearing shell is provided with a mounting cavity, the mounting cavity is provided with a horizontal mounting platform, the upper and lower parts of the directional inertial core are surrounded by flexible coupling rings, and a limiting strap is provided below, the flexible coupling rings are connected to the external bearing structure, and the two ends of the limiting strap are connected to the lower bearing ring.

[0008] In one alternative: shoulder mounting seats are fixed on both sides of the shoulder bearing ring, and the defensive arm is rotatably mounted on the shoulder mounting seats via a shoulder pivot. The return damping assembly includes a return elastic sleeve connecting the shoulder pivot and the shoulder mounting seats, and a rotation damper with its rotating end connected to the shoulder pivot. The unlocking and locking assembly includes a sector-shaped locking disc fixed to the root seat of the defensive arm and an elastic locking tongue that slides radially along the sector-shaped locking disc. An unlocking and locking notch is provided on the outer edge of the sector-shaped locking disc. The elastic locking tongue is kept protruding by a return spring and is connected to a unidirectional linear damping core with a bypass section and a throttling section.

[0009] In one alternative: the chest rib target plate is connected to the target plate support ring through a flexible guide membrane, and drives a partial stroke slider that is slidably installed on the target plate support ring. A pressure plate is provided on the rear side of the partial stroke slider. The pressure plate is opposite to the progressive coupling block fixed at the cavity opening of the directional inertial core mounting cavity. The central annular boss of the progressive coupling block protrudes forward from the outer annular step. The trigger push head is fixed on the pressure plate and extends into the mounting cavity through the through hole of the progressive coupling block.

[0010] In one alternative: the differential trigger lever is a horizontal L-shaped plate that rotates around a vertical trigger axis. Its input arm is opposite to the trigger push head, and its output arm is connected to the release cable. The lock hole on the input arm is vertically penetrating and offset from the trigger axis. The trigger locking pin is inserted into the lock hole from below, and its lower end is connected to the enable cable.

[0011] In one alternative: the front sheath is fixed to the target plate support ring, and the rear sheath is fixed to the directional inertial core. The rear sheath has independent vertical and horizontal stepped holes. The two ends of the outer sheath of the enabling cable are fixed in the front sheath and the vertical stepped hole, respectively. The two ends of the outer sheath of the releasing cable are fixed in the horizontal stepped hole and the rear end cover of the shoulder mounting seat, respectively. The initial gap between the trigger pusher and the differential trigger lever covers the stroke required for the trigger locking pin to fully retract, and takes into account the relative movement allowed by the directional inertial core.

[0012] In one alternative: an anti-accidental contact stop and a travel limit block are fixed on the shoulder mounting base. The anti-accidental contact stop cooperates with the limit lug of the root seat of the defensive arm. The travel limit block cooperates with the open limit protrusion of the sector-shaped locking disc. A root bearing belt is connected between the root seat of the defensive arm and the shoulder mounting base. A safety auxiliary sling is connected between the bearing hanger and the lower bearing ring.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention, through a defensive arm, an unlocking and locking assembly, and a chest and rib target plate located behind the defensive arm, allows the defensive arm to remain open after being opened, and the subsequent displacement of the chest and rib target plate on the same side triggers the defensive arm to return to its original position, forming a continuous training process of opening the defensive part, striking the exposed target area, and restoring the defensive position.

[0014] 2. The present invention uses an independently suspended directional inertial core, a fixed guide wheel, an enabling cable, a trigger locking pin, and a spaced trigger pusher to make the partial stroke slider first drive the trigger locking pin out of the lock hole, and then the continued movement of the trigger pusher relative to the directional inertial core drives the differential trigger swing rod. In conjunction with the anti-accidental contact stop, the inward rotation movement of the defensive arm is restricted, reducing the interference of the overall package movement and the force on the defensive arm on the target area to release the lock.

[0015] 3. This invention controls the return movement of the defensive arm through the return elastic sleeve and the rotation damper, and adapts to the delayed extension after rapid entry into the slot and completion of the pull-out stroke through the bypass section and the throttling section of the elastic locking tongue and the damping core, respectively, so that the defensive arm has time to rotate out of the release locking notch after unlocking, reducing the interruption of action caused by rapid rebound and re-locking. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the installation of the inspection cover and safety auxiliary sling of the present invention.

[0018] Figure 3 This is a schematic diagram of the installation of the directional inertial core of the present invention.

[0019] Figure 4 This is a schematic diagram of the installation of the shoulder bearing ring, longitudinal bearing belt and lower bearing ring of the present invention.

[0020] Figure 5 This is a schematic diagram of the installation of the left dual-condition release assembly and the right dual-condition release assembly of the present invention.

[0021] Figure 6 This is a schematic diagram of the progressive coupling block installation of the present invention.

[0022] Figure 7 This is a schematic diagram of the installation of the trigger pusher and the partial stroke slider of the present invention.

[0023] Figure 8 This is a schematic diagram of the installation of the anti-accidental contact stop and the root support belt of the present invention.

[0024] Figure 9 This is a schematic diagram of the fan-shaped locking disc and elastic locking tongue structure of the present invention.

[0025] Figure 10 This is a schematic diagram illustrating the installation of the cable enabling this invention.

[0026] Figure 11 This is a schematic diagram of the installation of the release cable of the present invention.

[0027] Figure reference numerals: 11 Bearing hanger, 12 External suspension assembly, 13 Shoulder bearing ring, 14 Longitudinal bearing belt, 15 Lower bearing ring, 16 Contouring cover, 17 Head target, 18 Left defensive arm, 19 Right defensive arm, 20 Central receiving cavity, 21 Internal suspension assembly, 22 Directional inertial core, 23 Upper flexible coupling ring, 24 Lower flexible coupling ring, 25 Progressive coupling block, 26 Limiting strap, 27 Left breaching linkage assembly, 28 Right breaching linkage assembly, 29 Shoulder mounting base, 30 Shoulder pivot, 31 Return elastic sleeve, 32 Rotary damper, 33 Sector locking disc 34 Open locking notch, 35 Elastic locking tongue, 36 Left chest rib target plate, 37 Right chest rib target plate, 38 Target plate support ring, 39 Flexible guide membrane, 40 Left dual-condition release assembly, 41 Right dual-condition release assembly, 42 Differential trigger lever, 43 Trigger shaft, 44 Trigger reset sleeve, 45 Trigger push head, 46 Release cable, 47 Front sheath seat, 48 Rear sheath seat, 49 Trigger locking pin, 50 Enabling cable, 51 Partial stroke slider, 52 Anti-accidental touch stop, 53 Root bearing belt, 54 Stroke limit block, 55 Inspection cover, 56 Safety auxiliary sling, 57 Fixed guide wheel. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] In one embodiment, such as Figures 1-11 As shown, the suspended martial arts training sandbag includes a support base 11, which is a support plate with multiple connection holes. The upper connection holes are connected to the hanging support of the training ground, and the lower part is provided with an outer suspension connection hole and an inner suspension connection hole. The two types of connection holes are separate from each other. The outer suspension component 12 includes a strap distributed on both sides below the support base 11. The upper end of the strap is fixed to the outer suspension connection hole by a connecting buckle, and the lower end is connected to the shoulder support ring 13 by a connecting buckle.

[0030] The shoulder bearing ring 13 is a flat, round, rigid ring arranged in the horizontal direction. Longitudinal bearing bands 14 extending downward are provided on its left and right sides respectively. The lower ends of the two longitudinal bearing bands 14 are connected to the left and right sides of the lower bearing ring 15 respectively. The shoulder bearing ring 13, the longitudinal bearing bands 14 and the lower bearing ring 15 form an external bearing structure. The contoured covering body 16 covers and connects to the outside of the external bearing structure.

[0031] The contoured covering 16 is shaped like a human torso and includes a wear-resistant outer skin, a cushioning filling layer and an inner lining layer. It retains a central receiving cavity 20 inside. The cushioning filling layer is set in a partitioned fixing method. The central receiving cavity 20 and the surrounding area of ​​the subsequent motion mechanism retain a space for movement. The upper middle position of the shoulder bearing ring 13 is fixed with an upwardly extending connecting part. The outer side of the connecting part covers the head target 17. The head target 17 is in the shape of a rounded elliptical block and is provided with a cushioning layer on the outside.

[0032] The inner suspension connection holes of the bearing hanger 11 are respectively connected to the two slings of the inner suspension assembly 21. The two slings are parallel to each other, and their lower ends are respectively connected to the two lugs on the upper part of the directional inertia core 22. The directional inertia core 22 is located in the central receiving cavity 20. Its static load is transferred to the bearing hanger 11 through the inner suspension assembly 21. The static load of the contoured covering body 16 is transferred to the bearing hanger 11 through the external bearing structure and the external suspension assembly 12.

[0033] The directional inertial core 22 includes a rounded rectangular support shell and a counterweight fixed inside the support shell. The counterweight is fixed by a limiting surface and fasteners inside the support shell to prevent it from moving freely inside the support shell. The outer surface of the support shell is provided with a buffer covering layer, and two mounting cavities are provided on the left and right sides of its front side. The mounting cavities are separate from the mounting space of the counterweight.

[0034] Each mounting cavity has a planar mounting edge around its opening, with threaded connection holes on the planar mounting edge. A horizontal mounting platform extends from the inner wall of the mounting cavity into the cavity, with mounting space reserved below the horizontal mounting platform. The side wall of the bearing shell has a cable-passing window communicating with the outside of the cavity on the lower side of the mounting cavity. Rigid mounting surfaces are reserved at the planar mounting edge and related connection holes.

[0035] The upper part of the directional inertial core 22 is surrounded by an upper flexible coupling ring 23. The outer edge of the upper flexible coupling ring 23 is connected to the shoulder bearing ring 13 through a connecting part. The lower part of the directional inertial core 22 is surrounded by a lower flexible coupling ring 24. The outer edge of the lower flexible coupling ring 24 is connected to the corresponding position of the longitudinal bearing belts 14 on both sides. The inner edges of the two flexible coupling rings are arranged around the side wall of the directional inertial core 22, and the relative range of motion of the directional inertial core 22 is limited by elastic contact and deformation allowance. The two mounting cavities are located between the upper flexible coupling ring 23 and the lower flexible coupling ring 24.

[0036] One end of the limiting strap 26 is fixed to the left and right sides of the lower bearing ring 15 respectively. The limiting strap 26 passes under the directional inertia core 22 in a U-shape. When normally suspended, there is a gap between the limiting strap 26 and the bottom of the directional inertia core 22. When the directional inertia core 22 moves downward to the limited position, the limiting strap 26 supports the directional inertia core 22 from below.

[0037] The shoulder support ring 13 is fixed to the shoulder mounting base 29 on both sides by bolts. The shoulder mounting base 29 includes a vertical back plate connected to the shoulder support ring 13, and an upper ear plate and a lower ear plate extending forward from the back plate. The upper ear plate and the lower ear plate are parallel to each other and spaced apart vertically. Coaxial shaft holes are opened on the two ear plates, and bushings are installed in the shaft holes. The shoulder rotating shaft 30 is rotatably supported in the two bushings.

[0038] The left defensive arm 18 and the right defensive arm 19 are respectively connected to the left and right shoulder pivots 30 through corresponding arm root seats. Each arm root seat is a sleeve-shaped component with a vertical shaft hole and is fixed to the shoulder pivot 30 by a key, so that the defensive arm and the shoulder pivot 30 rotate synchronously. The defensive arm includes a curved skeleton fixedly connected to the arm root seat and a buffer layer covering the outside of the curved skeleton. The arm root seat forms a limiting lug on the side facing the middle of the torso.

[0039] A return elastic sleeve 31 is provided between the upper ear plate and the arm root seat. The return elastic sleeve 31 includes an inner fixing sleeve, an outer fixing sleeve, and an annular elastic body connecting the two. The inner fixing sleeve is fixed to the shoulder pivot 30, and the outer fixing sleeve is fixed to the upper ear plate. The annular elastic body undergoes torsional deformation as the shoulder pivot 30 rotates relative to the upper ear plate. The return elastic sleeve 31 retains a pre-torsion amount acting in the return direction in the defensive position.

[0040] A rotary damper 32 is fixed below the lower ear plate. The housing of the rotary damper 32 is connected to the lower ear plate by bolts. Its rotating end is connected to the lower end of the shoulder shaft 30 through a connecting sleeve. The rotary damper 32 includes a housing, a rotating component, and a viscous medium working chamber located between the two. When the rotating component rotates with the shoulder shaft 30, it generates viscous resistance, which at least provides damping for the movement of the defensive arm in the return direction.

[0041] A sector-shaped locking plate 33 is fixed to the lower end face of the arm root seat of the defensive arm. The sector-shaped locking plate 33 is located between the arm root seat and the lower ear plate. Its plane is perpendicular to the axis of the shoulder rotation shaft 30. The outer arc of the sector-shaped locking plate 33 has a continuous guide section. The continuous guide section covers the rotation range between the defensive position and the open position. The corresponding open position of the outer arc is provided with an open locking notch 34 that is recessed in the radial direction.

[0042] A tongue guide seat is formed on the lower ear plate, which is located outside the outer edge of the arc of the sector locking disc 33. A horizontal guide channel extending radially along the sector locking disc 33 is opened in the tongue guide seat. The section of the guide channel near the sector locking disc 33 is a rectangular guide section, and the section away from the sector locking disc 33 is a receiving section.

[0043] The elastic locking tongue 35 includes a rectangular tongue body that slides with the rectangular guide section, a cylindrical pull rod connected to the rear end of the rectangular tongue body, and a return spring sleeved on the outside of the pull rod. The rear end cover is fixed to the rear end of the locking tongue guide seat by screws. One end of the return spring abuts against the rear end shoulder surface of the rectangular tongue body, and the other end abuts against the inner surface of the rear end cover, so that the rectangular tongue body maintains the tendency to extend toward the fan-shaped locking disc 33.

[0044] The front end of the rectangular tongue is provided with an inlet chamfer for the outer edge of the fan-shaped locking disc 33 to slide over. The side that bears the return load of the defensive arm forms a straight locking surface. The open locking notch 34 is provided with a locking sidewall that cooperates with the straight locking surface. A travel shoulder is provided between the rectangular tongue and the locking tongue guide seat to limit its maximum extension and to limit the rotation of the tongue itself through the rectangular guide.

[0045] The tail end of the pull rod is located inside the rear cover and has a side-mounted cable head slot. A stepped through hole is opened on the rear cover, which coincides with the axis of the pull rod. The larger hole on the outer side of the stepped through hole is used to fix the outer sheath end cap, and the smaller hole on the inner side is used to pass the inner cable. The pull rod and the rectangular tongue can move along the guide channel toward the rear cover, so that the front end of the rectangular tongue exits the open locking notch 34.

[0046] The side of the latch guide seat is fixed with a one-way linear damping core. The piston rod of the one-way linear damping core is connected to the connecting ear on the side of the rectangular tongue body. The damping core includes a cylinder, a piston, a piston rod, a one-way channel, and a throttling channel. The cylinder is connected to an elastic compensation chamber through a compensation hole to adapt to the change in oil volume caused by the piston rod moving in and out.

[0047] An axial bypass groove is provided on the inner wall of the cylinder. The axial bypass groove corresponds to the stroke range between the position where the locking tongue abuts the outer edge of the locking disc and the position where it enters the unlocking notch 34, and a fitting allowance is reserved. When the piston's sealing band is in this range, the oil can flow through the bypass groove on both sides of the piston, allowing the locking tongue to quickly enter the notch. When the locking tongue is pulled back and reaches the set release stroke, the piston leaves the range where the bypass groove is located.

[0048] The one-way channel is open in the direction of the locking tongue's withdrawal, allowing the locking tongue to be pulled out quickly. When the locking tongue returns forward from the set release position, the one-way channel closes, and the oil flows through the throttling channel, forming a delayed return. After the piston returns to the area where the bypass groove is located, the oil flows through the bypass again. The setting of the bypass section and the throttling section allows the open groove stroke and the return stroke after the release stroke to adopt different damping states.

[0049] Two target plate support rings 38 are installed on the lower front side of the shoulder support ring 13. The target plate support ring 38 is a vertically arranged rounded rectangular ring with an upwardly extending mounting ear at its upper end. The mounting ear is fixed to the shoulder support ring 13 by bolts. The connecting ear on the outer side of the target plate support ring 38 is connected to the longitudinal support belt 14 on the same side.

[0050] The left rib target plate 36 and the right rib target plate 37 are respectively set inside the two target plate support rings 38. Each rib target plate has a forward-protruding arc surface and a buffer covering layer on its outer surface. Its periphery is connected to the corresponding target plate support ring 38 through an annular flexible guide film 39. The outer edge of the flexible guide film 39 is fixed to the target plate support ring 38 by a pressing edge, and the inner edge is fixed to the periphery of the rib target plate by a pressing edge, so that the rib target plate can generate local displacement in the front-back direction.

[0051] Each target plate support ring 38 has a guide bridge integrally formed on its back side that spans the internal opening. A rectangular guide hole extending in the front-to-back direction is opened in the middle of the guide bridge. The partial stroke slider 51 includes a rectangular guide rod that slides through the rectangular guide hole. The front end of the rectangular guide rod is fixed to the back of the chest rib target plate through a connecting plate, and the rear end is connected to the pressure plate through a screw. A wear-resistant guide bushing is set in the rectangular guide hole. The rectangular guide rod and the guide bushing cooperate to limit the rotation of the slider and the sway of the target plate.

[0052] The upper part of the pressure plate forms an upward-extending connecting ear, and the center forms a push rod mounting position. The partial stroke slider 51 and the guide bridge are provided with front and rear stroke shoulders. An elastic pad is provided at the stroke shoulder to limit the front and rear movement range of the target plate. When the left and right defensive arms are in the defensive position, they respectively block the main striking area of ​​the corresponding chest and rib target plate.

[0053] The front surface of the back plate of the shoulder mounting seat 29 is fixed with bolts to the anti-accidental contact stop 52. The anti-accidental contact stop 52 includes a mounting foot and a stop head extending from the mounting foot toward the arm root seat. The mounting foot and the stop head form a right-angle bending structure. The stop head is located below the return elastic sleeve 31 and above the fan-shaped locking disc 33, and is at the same height as the limiting lug of the arm root seat.

[0054] The stop surface of the anti-accidental touch stop 52 is located on the path of the limiting lug as it rotates toward the defensive position. The stop surface is covered with an elastic pad. When the defensive arm returns to the chest, the limiting lug abuts against the stop surface to determine the defensive angle. When the defensive arm rotates outward, the limiting lug leaves the stop surface, and the anti-accidental touch stop 52 does not enter its open movement path.

[0055] The anti-accidental contact stop 52 is kept separate from the target plate support ring 38, the chest and rib target plate and the local stroke slider 51. In the defensive position, there is a gap between the rear surface of the defensive arm and the front surface of the corresponding chest and rib target plate. This gap covers the elastic deflection of the defensive arm under the design training load and the assembly deviation. The load that causes the defensive arm to continue to rotate inward is transmitted to the shoulder bearing ring 13 through the arm root seat, the limiting lug, the anti-accidental contact stop 52 and the shoulder mounting seat 29.

[0056] The back plate of the shoulder mounting seat 29 is connected to the root support belt 53 between the arm root seat and the back plate. The root support belt 53 is located outside the lock tongue guide seat and has a length allowance to meet normal rotation. The upper surface of the lower ear plate is fixed with the travel limit block 54. The lower surface of the fan-shaped locking disc 33 forms an opening limit protrusion. The opening limit protrusion abuts against the travel limit block 54 when the defensive arm reaches the maximum opening angle. The maximum opening position is set within the range where the opening locking notch 34 and the elastic lock tongue 35 can be inserted into each other.

[0057] A progressive coupling block 25 is installed at the opening of each mounting cavity of the directional inertial core 22. The progressive coupling block 25 is an elastic body with internal losses. Its rear end forms an outwardly expanding annular mounting flange. The mounting flange fits against the planar mounting edge of the periphery of the mounting cavity and is pressed by an annular pressure ring. The fixing screw passes through the pressure ring and connects with the threaded hole on the planar mounting edge, restricting the mounting flange between the pressure ring and the planar mounting edge.

[0058] The front end of the progressive coupling block 25 forms a central annular boss and an outer annular step located on the outer periphery of the central annular boss. The height of the central annular boss extending forward is greater than that of the outer annular step. The pressure plate at the rear end of the local stroke slider 51 is opposite to the central annular boss. In the initial position, it lightly touches the central annular boss. When the pressure plate moves backward, it first compresses the central annular boss and then contacts the outer annular step after continuing to move, thereby increasing the area involved in bearing pressure.

[0059] The rear mounting flange of the progressive coupling block 25 is fixed to the directional inertial core 22, and the front end contacts the pressure plate but is not fixed to the pressure plate. A through hole is opened in the middle of the progressive coupling block 25 in the front-to-back direction, and the rear end of the through hole is connected to the mounting cavity of the directional inertial core 22.

[0060] The trigger pusher 45 is a rod-shaped component arranged in the front-to-back direction. Its front end is fixed to the central mounting position of the pressure plate, and its rear end passes through the through hole of the progressive coupling block 25 and extends into the mounting cavity. The rear end of the trigger pusher 45 forms an arc contact end face. The radial clearance between the through hole and the trigger pusher 45 is determined according to the hole shape change of the progressive coupling block 25 under the maximum working compression state, the allowable lateral relative displacement of the directional inertial core 22, and the assembly deviation, so that the through hole does not clamp the trigger pusher 45 during operation.

[0061] Each mounting cavity has a trigger shaft 43 fixed on a horizontal mounting platform. The trigger shaft 43 is set vertically. The differential trigger lever 42 is a horizontally set L-shaped plate with a shaft hole at its corner position, and is rotatably mounted on the trigger shaft 43 through a bushing.

[0062] The differential trigger lever 42 includes an input arm and an output arm. The input arm extends from the trigger shaft 43 toward the shoulder on the same side. The end of the input arm forms a bearing surface opposite to the rear end of the trigger push head 45. The output arm extends from the trigger shaft 43 toward the rear side. The end of the output arm has a cable connection hole. When the trigger push head 45 pushes the input arm backward, the end of the output arm moves toward the middle of the torso. The width of the bearing surface of the input arm covers the contact position change of the trigger push head 45 within the allowable relative range of motion.

[0063] The trigger reset sleeve 44 is disposed between the differential trigger lever 42 and the horizontal mounting platform. Its inner connecting part is fixed to the trigger shaft 43, and its outer connecting part is fixed to the differential trigger lever 42. The trigger reset sleeve 44 adopts an elastic sleeve with torsional recovery capability and internal loss. An initial limit shoulder is formed on the horizontal mounting platform. Under the action of the trigger reset sleeve 44, the differential trigger lever 42 returns to the position determined by the initial limit shoulder.

[0064] A vertically penetrating lock hole is opened near the trigger shaft 43 on the input arm. The axis of the lock hole is parallel to and spaced apart from the axis of the trigger shaft 43. An inlet chamfer is formed at the bottom of the lock hole. A lock pin guide seat is formed at the corresponding position of the horizontal mounting platform. A vertical stepped guide hole is opened in the lock pin guide seat.

[0065] The trigger locking pin 49 slides through the stepped guide hole. Its upper end is a rounded pin head, the middle part forms a limiting shoulder, and the lower end is a traction rod. The bottom cover is installed at the lower end of the locking pin guide seat. The traction rod passes through the bottom cover and extends into the installation space below the horizontal mounting platform. A cable head slot is opened at the tail end of the traction rod. A return spring is installed on the outer sleeve of the traction rod. One end of the return spring abuts against the lower surface of the limiting shoulder, and the other end abuts against the upper surface of the bottom cover.

[0066] When the differential trigger lever 42 is in the initial position, the locking hole is located directly above the trigger locking pin 49. The pin head is inserted into the locking hole upward under the action of the reset spring. When the traction rod is pulled downward, the pin head exits the locking hole and descends below the lower surface of the differential trigger lever 42. The differential trigger lever 42 obtains a rotational stroke. The guide stroke of the trigger locking pin 49 and the compressible stroke of the reset spring cover the traction amount corresponding to the full working stroke of the partial stroke slider 51.

[0067] The fixed reversing guide wheel 57 is installed above the guide bridge of the target plate support ring 38. Its wheel axle is fixed to the mounting ear of the target plate support ring 38 in the left and right direction. The guide wheel is rotatably set on the wheel axle. The wheel groove is located in the vertical plane in the front and back direction. The fixed reversing guide wheel 57 is located in front of the upper connecting ear of the partial stroke slider 51. Its installation position is offset from the movement area of ​​the trigger push head 45 and the progressive coupling block 25.

[0068] The front sheath seat 47 is a right-angle seat with a mounting base plate and a vertical lug. The mounting base plate is fixed to the guide bridge with screws. The vertical lug is located behind the fixed reversing guide wheel 57. The vertical lug has a stepped hole that runs through the front and rear directions. The small hole section at the front allows the inner cable to pass through, and the large hole section at the rear accommodates the metal end cap of the outer sheath. The shoulder between the two hole sections supports the end cap of the outer sheath. Radial fasteners are provided on the vertical lug to restrict the end cap within the large hole section. The stepped hole corresponds to the upper cable outlet section of the fixed reversing guide wheel 57.

[0069] The rear sheath seat 48 includes a fixed foot, a lower horizontal lug, and an upper side lug. The fixed foot is fixed to the mounting surface of the mounting cavity sidewall of the directional inertial core 22 by screws. The lower horizontal lug extends directly below the tail end of the trigger locking pin 49 and has a vertical stepped hole. The upper side lug is located on the side of the output arm end of the differential trigger lever 42 facing the same side shoulder and has a horizontal stepped hole at the same height as the output arm end.

[0070] The small opening of the vertical stepped hole of the rear sheath seat 48 faces upward and is opposite to the tail end of the trigger locking pin 49. The small opening of the horizontal stepped hole faces the end of the output arm of the differential trigger lever 42. The two stepped holes are independent of each other, and their large hole sections respectively accommodate the outer sheath end cap, and the axial movement of the end cap is restricted by the hole shoulder and fastener.

[0071] The enabling cable 50 includes a flexible outer sheath and an inner cable that slides through the flexible outer sheath. The front end of the inner cable is fixed to the upper connecting lug of the partial stroke slider 51, then extends forward, passes around the front half-circumference groove of the fixed reversing guide wheel 57, and then turns back and passes through the front sheath seat 47.

[0072] The front end of the outer sheath of the enabling cable 50 is fixed in the large hole section at the rear side of the front sheath seat 47. The rear end of the outer sheath extends to the rear sheath seat 48 through an arc path and is fixed in the vertical stepped hole of the lower horizontal lug. The inner cable extends upward from the small hole of the vertical stepped hole, and its end cable head is inserted into the cable head slot at the tail end of the trigger locking pin 49. The outer sheath is led out from the cable-passing window of the directional inertial core 22, avoiding the movement path of the progressive coupling block 25 and the trigger push head 45.

[0073] When the partial stroke slider 51 moves backward, the inner cable section between its connecting ear and the fixed reversing guide wheel 57 increases. The inner cable moves relative to the outer sheath and pulls the trigger locking pin 49 downward. The front sheath seat 47 is fixed to the target plate support ring 38, and the rear sheath seat 48 is fixed to the directional inertial core 22, so that the outer sheaths at both ends are respectively fixedly supported, and the displacement of the inner cable is transmitted to the trigger locking pin 49.

[0074] The release cable 46 also includes an outer sheath and an inner cable. The lower end of the inner cable is connected to the cable head connection hole at the end of the output arm of the differential trigger lever 42, and then passes through the horizontal stepped hole of the upper side ear of the rear sheath seat 48 in the same direction as the shoulder. The lower end of the outer sheath of the release cable 46 is fixed in the large hole section of the horizontal stepped hole, and the upper end extends along the arc path to the shoulder mounting seat 29 and is fixed in the outer large hole section of the rear end cover of the latch guide seat.

[0075] After the inner cable of the release cable 46 passes through the small hole section of the rear end cover, the end cable head is engaged in the cable head slot at the end of the elastic locking tongue 35 lever. When the input arm of the differential trigger lever 42 is pushed backward, the output arm end moves toward the middle of the body and away from the horizontal cable outlet of the rear sheath seat 48, so that the inner cable of the release cable 46 is tightened. The upper end of the inner cable pulls the lever and rectangular tongue of the elastic locking tongue 35 toward the rear end cover, so that the rectangular tongue exits the unlocking locking notch 34.

[0076] Both the outer sheaths of the enabling cable 50 and the releasing cable 46 retain bending margins to accommodate the relative movement of the inner and outer suspension structures. The end of the outer sheath transmits the compressive reaction force through a metal end cap, and the end of the inner cable transmits the tensile force through a cable head. The two cables are arranged along a separate path within the central receiving cavity 20, avoiding the rotation areas of the fan-shaped locking disc 33, the root seat of the defensive arm, and the differential trigger lever 42.

[0077] The aforementioned triggering structure on the left constitutes the left dual-condition release lock assembly 40, and the corresponding structure on the right constitutes the right dual-condition release lock assembly 41. The left defensive arm 18, the left chest and rib target plate 36, the left dual-condition release lock assembly 40, and the corresponding shoulder locking and return structure together constitute the left break-through linkage assembly 27, and the corresponding structure on the right together constitute the right break-through linkage assembly 28.

[0078] The above embodiments disclose a suspended martial arts training sandbag, wherein a maintenance cover 55 is provided on the rear side of the shaping cover 16. The maintenance cover 55 is detachably connected to the surrounding cover. After opening the maintenance cover 55, the directional inertial core 22, the cable sheath and its end connection position can be approached. After disassembling the corresponding chest and rib target plate and the progressive coupling block 25, the differential triggering swing rod 42 and the triggering locking pin 49 in the installation cavity can be inspected and repaired.

[0079] The upper end of the safety auxiliary sling 56 is connected to the bearing support 11, and the lower end is connected to the lower bearing ring 15. It is loosely arranged inside the package on one side of the inspection cover 55. During normal use, the safety auxiliary sling 56 does not bear the main suspension load and avoids the movement area of ​​the two cables.

[0080] In the initial state, the left and right defensive arms are located in front of the chest, and the limiting lugs of their arm bases abut against the corresponding anti-misoperation stop 52. The left and right chest rib target plates are located in the initial position on the front side. The trigger locking pin 49 is inserted into the locking hole of the differential trigger lever 42, and the trigger push head 45 maintains the initial gap with the input arm.

[0081] When the trainee opens one of the defensive arms outward, the defensive arm drives the shoulder pivot 30 and the fan-shaped locking plate 33 to rotate. The return elastic sleeve 31 undergoes torsional deformation, and the elastic locking tongue 35 slides along the outer edge of the arc of the fan-shaped locking plate 33. After the opening locking notch 34 reaches the locking tongue position, the locking tongue enters the notch under the action of the return spring, and the defensive arm remains open, exposing the chest and rib target plate on the same side.

[0082] After the trainee strikes the exposed chest and rib target plate, the chest and rib target plate drives the partial stroke slider 51 to move backward, enabling the pull cable 50 to be pulled after being reversed by the fixed reversing guide wheel 57. The trigger locking pin 49 is pulled downward out of the locking hole of the differential trigger lever 42. At this stage, the trigger push head 45 has not yet contacted the input arm.

[0083] As the chest and rib target plate continues to move backward, the pressure plate gradually compresses the progressive coupling block 25, triggering the pusher head 45 to cross the initial gap and push the input arm. The differential trigger lever 42 rotates, and its output arm end pulls the elastic locking tongue 35 through the release cable 46. The locking tongue exits the unlocking notch 34 and enters the corresponding slow return stroke state after reaching the set release stroke.

[0084] After the defensive arm is unlocked, it returns under the action of the return elastic sleeve 31. The rotation damper 32 limits the return speed. After the fan-shaped locking plate 33 rotates away from the notch engagement range, the elastic locking tongue 35 gradually returns to the position of abutting the outer edge of the arc. Finally, the defensive arm returns to the defensive position through the cooperation of the arm root seat limiting lug and the anti-accidental contact stop 52.

[0085] After the impact load is released, the flexible guide film 39 and the progressive coupling block 25 cause the chest and rib target plate and the local stroke slider 51 to reset, enabling the pull cable 50 and the release pull cable 46 to relax accordingly. The differential trigger swing rod 42 returns to the position limited by the initial limit shoulder under the action of the trigger reset sleeve 44. If the trigger locking pin 49 rises first, its rounded pin head first abuts the lower surface of the swing rod. After the lock hole turns back to the top of the pin head, it is inserted into the lock hole to complete the relocking.

[0086] When the movement of the package body does not cause the partial stroke slider 51 to reach the retraction stroke, the trigger locking pin 49 remains engaged with the lock hole. Within the limited relative range of motion, the trigger push head 45 will not push the differential trigger lever 42, which is in a locked state, in advance. Thus, through the sequential cooperation of the partial stroke retraction pin and the relative stroke drive lever, the sequential unlocking of the same side defensive arm is completed.

[0087] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A suspended martial arts training sandbag, comprising a support frame (11) and a sandbag body (16) suspended below it by an external suspension assembly (12), characterized in that, The contoured enclosure (16) contains a directional inertial core (22) connected to a support bracket via an internal suspension assembly (21). The contoured enclosure (16) has a left breaching linkage assembly (27) and a right breaching linkage assembly (28) on its sides. The left breaching linkage assembly (27) includes a left defensive arm (18) rotatably mounted on the left shoulder of the contoured enclosure (16) and a left chest rib target plate (36) located to its left rear. The right breaching linkage assembly (28) includes a right defensive arm (19) rotatably mounted on the right shoulder of the contoured enclosure (16) and a right chest rib target plate (37) located to its right rear. The defensive arm is connected to an opening locking assembly and a return mechanism. The position damping assembly, the chest rib target plate is movably installed on the contoured covering body (16) through the target plate support ring (38), and a left dual-condition release assembly (40) and a right dual-condition release assembly (41) are provided between the chest rib target plate and the directional inertial core. The dual-condition release assembly includes a differential trigger swing rod (42) rotatably set on the directional inertial core and a trigger locking pin (49) inserted into its lock hole. The chest rib target plate is connected to the trigger locking pin through an enabling cable (50) that passes around the fixed reversing guide wheel (57) set on the target plate support ring, and is connected to a trigger push head (45) that is spaced opposite to the differential trigger swing rod. The differential trigger swing rod is connected to the unlocking locking assembly through the release cable (46).

2. The suspended martial arts training sandbag according to claim 1, characterized in that, The lower end of the external suspension assembly (12) is connected to the shoulder support ring (13), the shoulder support ring (13) is connected to the lower support ring (15) through the longitudinal support belts (14) on both sides, the contoured covering body (16) covers and connects to the outside of the shoulder support ring (13), the longitudinal support belts (14) and the lower support ring (15), the head target (17) is connected to the shoulder support ring (13), the contoured covering body (16) is provided with an inspection cover (55) on the rear side, and a loosely arranged safety auxiliary sling (56) is connected between the support bracket (11) and the lower support ring (15).

3. The suspended martial arts training sandbag according to claim 2, characterized in that, The contoured covering (16) forms a central receiving cavity (20). The internal suspension assembly (21) includes two parallel suspension straps that connect the upper part of the bearing bracket (11) and the directional inertial core (22). The directional inertial core (22) includes a bearing shell and a counterweight fixed in the bearing shell. Two mounting recesses are provided at intervals on the front side of the bearing shell. Each mounting recess is provided with a horizontal mounting platform. A planar mounting edge is formed around the periphery of the cavity opening. The upper and lower parts of the directional inertial core (22) are respectively surrounded by an upper flexible coupling ring (23) and a lower flexible coupling ring (24) whose outer edges are respectively connected to the shoulder bearing ring (13) and the longitudinal bearing belt (14). The directional inertial core (22) is provided with a limiting pocket (26) with both ends connected to the lower bearing ring (15).

4. The suspended martial arts training sandbag according to claim 3, characterized in that, Shoulder mounting bases (29) are fixed on both sides of the shoulder bearing ring (13). The shoulder mounting base (29) includes a back plate and an upper ear plate and a lower ear plate extending forward from the back plate. The shoulder pivot (30) is rotatably supported on the upper ear plate and the lower ear plate. The arm root seat of the defensive arm is fixed on the shoulder pivot (30). The return damping assembly includes a return elastic sleeve (31) disposed between the upper ear plate and the arm root seat and a rotation damper (32) fixed below the lower ear plate. The inner connecting part of the return elastic sleeve (31) is fixed to the shoulder pivot (30), and the outer connecting part is fixed to the upper ear plate. The rotating end of the rotation damper (32) is connected to the shoulder pivot (30).

5. The suspended martial arts training sandbag according to claim 4, characterized in that, The unlocking and locking assembly includes a fan-shaped locking disc (33) fixed to the lower end of the arm root seat. An unlocking and locking notch (34) is opened on the outer arc edge of the fan-shaped locking disc (33). A locking tongue guide seat is provided on the lower ear plate, located on the outer periphery of the fan-shaped locking disc (33). An elastic locking tongue (35) is slidably arranged in the locking tongue guide seat along the radial direction of the fan-shaped locking disc (33). The elastic locking tongue (35) includes a rectangular tongue body and a pull rod connected to the rear end of the rectangular tongue body. A rear end cover is fixed to the rear end of the locking tongue guide seat. A reset spring is sleeved on the outside of the pull rod and abuts against the rectangular tongue body and the rear end cover. A cable head slot is provided at the tail end of the pull rod. A stepped through hole coaxial with the pull rod is opened on the rear end cover. A one-way linear damping core with a movable end connected to the rectangular tongue body is fixed to the side of the locking tongue guide seat. A one-way channel and a throttling channel are provided on the piston of the one-way linear damping core. An axial bypass groove corresponding to the stroke range of the extended end of the elastic locking tongue (35) is provided on the inner wall of the cylinder.

6. The suspended martial arts training sandbag according to claim 5, characterized in that, The target plate support ring (38) is fixed to the shoulder bearing ring (13) by the upper mounting ear. The chest rib target plate is connected to the target plate support ring (38) by the flexible guide film (39). A partial stroke slider (51) is slidably passed through the guide bridge on the back of the target plate support ring (38). The front end of the partial stroke slider (51) is fixed to the chest rib target plate and the rear end is connected to the pressure plate. The rear end mounting flange of the progressive coupling block (25) is fixed on the plane mounting edge. The progressive coupling block (25) is an elastic body with a central annular boss and an outer annular step at its front end. The central annular boss protrudes forward more than the outer annular step. The trigger push head (45) is fixed on the pressure plate and extends into the mounting cavity through the through hole of the progressive coupling block (25).

7. The suspended martial arts training sandbag according to claim 6, characterized in that, A vertical trigger shaft (43) is fixed on the horizontal mounting platform. The differential trigger lever (42) is a horizontal L-shaped plate rotatably mounted on the trigger shaft (43). A trigger reset sleeve (44) is provided between the differential trigger lever (42) and the horizontal mounting platform. The input arm of the differential trigger lever (42) extends toward the shoulder on the same side, and the output arm extends toward the rear side. The lock hole vertically passes through the input arm and is spaced apart from the trigger shaft (43). A lock pin guide seat is provided below the lock hole on the horizontal mounting platform. The trigger lock pin (49) slides vertically through the lock pin guide seat. Its upper end is opposite to the lock hole, and its lower end extends to the bottom of the horizontal mounting platform. A reset compression spring is provided between the limiting shoulder of the trigger lock pin (49) and the bottom cover of the lock pin guide seat.

8. The suspended martial arts training sandbag according to claim 7, characterized in that, The fixed reversing guide wheel (57) is installed on the target plate support ring (38) and is located in front of the cable connection position of the partial stroke slider (51). The front sheath seat (47) is fixed to the guide bridge and is located behind the fixed reversing guide wheel (57). The rear sheath seat (48) is fixed to the side wall of the mounting cavity. The lower horizontal lug of the rear sheath seat (48) is provided with a vertical stepped hole located below the trigger lock pin (49), and the upper side lug is provided with a horizontal stepped hole at the same height as the end of the output arm and located on the same side of the shoulder of the end of the output arm. The two ends of the outer sheath of the enabling cable (50) are fixed to the front sheath seat (47) and the vertical stepped hole respectively. One end of its inner cable is connected to the partial stroke slider (51) and passes through the front sheath seat (47) after being folded back through the fixed reversing guide wheel (57). The other end extends upward from the vertical stepped hole and is connected to the trigger lock pin (49).

9. The suspended martial arts training sandbag according to claim 8, characterized in that, The outer sheath of the release cable (46) is fixed at both ends to the horizontal stepped hole of the rear sheath seat (48) and the stepped through hole of the rear end cover, respectively. The inner cable is connected at both ends to the output arm of the differential trigger lever (42) and the tail end of the pull rod of the elastic locking tongue (35), respectively. When the chest rib target plate and the directional inertial core (22) are in the initial position, the front-to-back distance between the trigger push head (45) and the input arm is greater than the sum of the stroke of the local stroke slider (51) corresponding to the complete withdrawal of the trigger locking pin (49) from the lock hole and the maximum allowable relative displacement of the directional inertial core (22) towards the target plate support ring (38).

10. The suspended martial arts training sandbag according to claim 9, characterized in that, A right-angle bent anti-accidental touch stop (52) is fixed on the back plate of the shoulder mounting base (29). The stop head of the anti-accidental touch stop (52) is located below the return elastic sleeve (31) and above the fan-shaped locking disc (33). A limiting lug opposite to the stop head is formed on the arm root seat. A root bearing belt (53) is connected between the arm root seat and the shoulder mounting base (29). A travel limiting block (54) is fixed on the lower lug plate. An open limiting protrusion opposite to the travel limiting block (54) is formed on the lower surface of the fan-shaped locking disc (33).

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