Charging device and pusher

Abstract

The present invention provides a charging device and a pusher thereof, the pusher comprising: a bracket, having a vertical cavity and a horizontal cavity connected to each other; a reset mechanism, having a pressing slider and a reset rod, the pressing slider can be horizontally movably arranged in the horizontal cavity, and the reset rod can be horizontally movably connected to the pressing slider; a locking slider abutting against the upper end of the pressing slider, and the locking slider can be moved up and down in the vertical cavity according to the horizontal movement of the pressing slider; a pressing handle, which can be inserted into the vertical cavity, and a pressing slope is formed at the lower end of the pressing handle, and the pressing slope abuts against the reset slope on the pressing slider; wherein the pressing handle has two symmetrically arranged insertion plates, the lower end of the insertion plates is formed with a pressing slope, and two reset slopes are symmetrically arranged on both sides of the pressing slider; a push-pull rod, which can be horizontally movably arranged above the locking slider, and a locking structure is arranged between the push-pull rod and the locking slider. The present invention has a simple structure, few parts, and can complete the self-locking and pressure relief operations with only one hand operation.

Description

[0001] This application is a divisional application. The application number of the original application is 201710062649.X, the application date is January 24, 2017, and the name of the invention is “Charging device and pusher thereof”. Technical Field

[0002] The present invention relates to a charging device and a pusher, and in particular to a charging device and a pusher used for expanding a medical balloon catheter in percutaneous coronary angioplasty in the field of medical equipment. Background Art

[0003] Interventional technology is a minimally invasive treatment technology that uses modern high-tech means. Under the guidance of medical imaging equipment, special catheters, guide wires and other precision instruments are introduced into the human body to diagnose and locally treat lesions in the body.

[0004] Percutaneous transluminal coronary angioplasty is a procedure that uses femoral artery puncture to deliver a balloon catheter to the site of coronary artery stenosis, then pressurizes and expands the balloon catheter to increase the inner diameter of the blood vessel and improve myocardial blood supply.

[0005] At present, the charging device for charging the balloon catheter has many parts, complex assembly, and high quality requirements for each part. This will cause problems such as high production cost, great production difficulty, and high quality control requirements.

[0006] Therefore, it is necessary to provide a new charging device to overcome the above-mentioned defects. Summary of the invention

[0007] The object of the present invention is to provide a pusher for a charging device, which has a simple structure, few parts and can realize the self-locking and unlocking operations of a push-pull rod by single-hand operation.

[0008] Another object of the present invention is to provide a charging device which has a simple structure, few parts and can complete the self-locking and pressure relief operations with only one hand.

[0009] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0010] The present invention provides a pusher of a charging device, the pusher comprising:

[0011] A bracket having a vertical cavity and a horizontal cavity connected to each other;

[0012] A reset mechanism, comprising a pressing slider and a reset rod, wherein the pressing slider is horizontally movably disposed in the horizontal cavity, and the reset rod is horizontally movably connected to the pressing slider;

[0013] A locking slider abuts against the upper end of the pressing slider, and the locking slider is disposed in the vertical cavity so as to be movable up and down according to the horizontal movement of the pressing slider;

[0014] A pressing handle can be inserted into the vertical cavity, a pressing slope is formed at the lower end of the pressing handle, and the pressing slope abuts against the reset slope on the pressing slider; wherein the pressing handle has two symmetrically arranged insertion plates, the pressing slope is formed at the lower end of the insertion plates, and two reset slopes are symmetrically arranged on both sides of the pressing slider;

[0015] A push-pull rod is horizontally movable and is arranged above the locking slide block. A locking structure is arranged between the push-pull rod and the locking slide block.

[0016] The present invention provides a pusher of a pressure charging device, which is installed in a housing of the pressure charging device, and the pusher comprises:

[0017] A bracket having a vertical cavity and a horizontal cavity connected to each other;

[0018] A reset mechanism, comprising a pressing slider and a reset rod, one end of the reset rod abuts against the inner wall of the housing, the other end of the reset rod can be horizontally elastically connected to the pressing slider, and the pressing slider can be horizontally movably disposed in the horizontal cavity;

[0019] A locking slider abuts against the upper end of the pressing slider, and the locking slider is disposed in the vertical cavity so as to be movable up and down according to the horizontal movement of the pressing slider;

[0020] A pressing handle can be inserted into the vertical cavity, a pressing inclined surface is formed at the lower end of the pressing handle, and the pressing inclined surface abuts against the reset inclined surface on the pressing slider;

[0021] A push-pull rod is horizontally movable and is arranged above the locking slide block. A locking structure is arranged between the push-pull rod and the locking slide block.

[0022] In an embodiment of the present invention, the locking structure includes a locking groove and a locking block that lock with each other, the locking groove is recessed on the upper surface of the locking slider, and a plurality of the locking blocks are spaced apart at intervals along the direction of its horizontal movement at the lower portion of the push-pull rod; or the locking block is protrudingly provided on the upper surface of the locking slider, and a plurality of the locking grooves are recessed at intervals along the direction of its horizontal movement at the lower portion of the push-pull rod.

[0023] In an embodiment of the present invention, the locking structure includes an internal thread groove arranged on the upper part of the locking slider and an external thread rod threadedly connected to the internal thread groove, and the external thread rod is arranged on the push-pull rod.

[0024] In an embodiment of the present invention, the external threaded rod has a trapezoidal thread tooth that prevents the push-pull rod from retreating from the internal thread groove, and the length of the retreat side of the trapezoidal thread tooth is smaller than the length of the feed side of the trapezoidal thread tooth.

[0025] In an embodiment of the present invention, a horizontal connecting hole is provided in the pressing slider of the reset mechanism, a protrusion is provided in the horizontal connecting hole, and a sliding groove is provided on the reset rod; an abutment ring is provided at one end of the reset rod, a spring is clamped between the abutment ring and the bracket, the spring is sleeved on the reset rod, and the protrusion can be horizontally and elastically arranged in the sliding groove through the spring.

[0026] In an embodiment of the present invention, the other end of the reset rod is provided with a conversion opening groove connected to the sliding groove, the conversion opening groove is arranged parallel to the sliding groove, and the protrusion is inserted into the sliding groove through the conversion opening groove.

[0027] In an embodiment of the present invention, a guide ridge is convexly provided on the reset rod, and a guide groove matching with the guide ridge is provided in the connecting hole.

[0028] In an embodiment of the present invention, an upper stepped slope is provided on the upper surface of the pressing slider, and a lower stepped slope is provided on the lower surface of the locking slider, and the upper stepped slope matches the lower stepped slope.

[0029] In an embodiment of the present invention, the upper step inclined surface is formed on an upper step protrusion convexly provided on the upper surface of the pressing slider, and a guide groove is provided on the upper step protrusion; the lower step inclined surface is formed on a lower step protrusion convexly provided on the lower surface of the locking slider, and a guide block is provided on the lower step protrusion, and the guide block can be slidably arranged in the guide groove.

[0030] In an embodiment of the present invention, the pressing handle has two symmetrically arranged inserting plates, the lower ends of the inserting plates are formed with the pressing inclined surfaces, and two resetting inclined surfaces are symmetrically arranged on both sides of the pressing slider.

[0031] In an embodiment of the present invention, two vertical grooves communicating with the vertical cavity are symmetrically provided on both sides of the bracket, and two vertical limit blocks are symmetrically provided on both sides of the locking slider, and the vertical limit blocks can be slidably arranged in the vertical grooves.

[0032] In an embodiment of the present invention, a horizontal groove communicating with the horizontal cavity is provided on the bottom wall of the bracket, and a horizontal limit block is provided on the bottom of the pressing slider, and the horizontal limit block can be horizontally movably disposed in the horizontal groove.

[0033] The present invention also provides a charging device, which includes the pusher as described above, and the charging device also includes:

[0034] The housing has a pressurizing chamber and a pushing chamber connected to each other, the pusher is arranged in the pushing chamber, one end of the push-pull rod extends into the pressurizing chamber, and the other end of the push-pull rod is provided with a gripping handle;

[0035] A locking joint is connected to one end of the shell through a connecting pipe, and the connecting pipe is communicated with the pressure charging chamber of the shell.

[0036] In an embodiment of the present invention, a pressure gauge is provided on the housing, and the pressure gauge is communicated with the pressure charging chamber.

[0037] In an embodiment of the present invention, one end of the push-pull rod extending into the pressure-charging chamber is connected to a sealing rubber plug, and the sealing rubber plug is in sealing and sliding contact with the inner wall of the shell.

[0038] The characteristics and advantages of the charging device and the pusher thereof of the present invention are as follows: the present invention has a simple structure and few parts, and can realize the locking and unlocking operations of the push-pull rod under the condition of single-handed operation. The pusher and the charging device having the pusher improve the convenience of the operator and make the operation more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 It is a schematic diagram of the three-dimensional structure of the assembly of the pressing handle, the locking slider and the pressing slider of the present invention.

[0041] Figure 2 It is a schematic cross-sectional structure diagram of a pusher of the charging device of the present invention in which no push-pull rod is provided.

[0042] Figure 3 It is a structural schematic diagram of implementation mode 1 of the locking structure of the present invention.

[0043] Figure 4 It is a structural schematic diagram of implementation mode 2 of the locking structure of the present invention.

[0044] Figure 5 It is a three-dimensional structural schematic diagram of the third embodiment of the locking structure of the present invention.

[0045] Figure 6 It is a cross-sectional schematic diagram of the cooperation between the external thread rod and the internal thread groove in the locking structure of the third embodiment of the present invention.

[0046] Figure 7 It is a three-dimensional diagram of the pressing slider of the present invention.

[0047] Figure 8 It is a side view of the pressing slider of the present invention.

[0048] Fig. 9 It is a top cross-sectional view of the cooperation between the pressing slider and the reset rod of the present invention.

[0049] Fig.10 It is a stereoscopic diagram of the cooperation between the pressing slider and the reset rod of the present invention.

[0050] Fig.11 It is a bottom perspective view of the locking slider of the present invention.

[0051] Fig.12 It is a schematic structural diagram of the shell of the charging device of the present invention. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Implementation Method 1

[0054] like Figure 1 , Figure 2 and Fig.12As shown, the present invention provides a pusher for a charging device, which is installed in a housing 10 of the charging device, and the pusher includes a bracket 1, a reset mechanism 2, a locking slider 3, a pressing handle 4 and a push-pull rod 5, wherein: the bracket 1 has a vertical cavity 11 and a horizontal cavity 12 that are connected; the reset mechanism 2 has a pressing slider 21 and a reset rod 22, the reset rod 22 is horizontally movably connected to the pressing slider 21, and the pressing slider 21 is horizontally movably arranged in the horizontal cavity 12; the locking slider 3 is in abutment with the upper end of the pressing slider 21, and the locking slider 3 can be arranged in the vertical cavity 11 and can be moved up and down according to the horizontal movement of the pressing slider 21; the pressing handle 4 can be inserted into the vertical cavity 11, and a pressing inclined surface 41 is formed at the lower end of the pressing handle 4, and the pressing inclined surface 41 is in abutment with the reset inclined surface 211 on the pressing slider 21; the push-pull rod 5 can be horizontally moved and is arranged above the locking slider 3, and a locking structure 6 is provided between the push-pull rod 5 and the locking slider 3. When the pusher of the charging device of the present invention is in the locked state, the pressing handle 4 is manually pressed down to make the pressing inclined surface 41 at the lower end of the pressing handle 4 abut against the reset inclined surface 211 of the pressing slide block 21, so that the pressing slide block 21 moves horizontally in the horizontal cavity 12 of the bracket 1. As the pressing handle 4 is pressed down, the locking slide block 3 in the vertical cavity 11 is pushed downward. At this time, the locking structure 6 between the upper end of the locking slide block 3 and the push-pull rod 5 is unlocked, and the push-pull rod 5 can move horizontally. When it is necessary to lock the push-pull rod 5, the downward pressing force on the pressing handle 4 is cancelled. At this time, the pressing slide block 21 slides to the initial position in the horizontal cavity 12 under the action of the elastic restoring tension of the reset rod 22. Due to the return of the pressing slide block 21, the locking slide block 3 is pushed up in the vertical cavity 11 by the pressing slide block 21. The locking slide block 3 is locked with the push-pull rod 5 through the locking structure 6, and the push-pull rod 5 is fixed on the locking slide block 3. The pusher of the charging device of the present invention has a simple structure and few parts. The pusher can lock and unlock the push-pull rod 5 with one hand. The pusher improves the convenience of the operator and makes the operation more flexible and convenient.

[0055] Specifically, Figure 2 and Fig.10As shown, the bracket 1 is generally in the shape of a rectangular shell, and has a vertical cavity 11 and a horizontal cavity 12 that are connected, wherein the lower end of the vertical cavity 11 forms a connected structure with one end of the horizontal cavity 12, and the end of the horizontal cavity 12 that is connected with the lower end of the vertical cavity 11 is the initial position of the pressing slider 21, and at this time, the locking slider 3 is just in a locked state with the push-pull rod 5. The upper end of the bracket 1 is provided with an upper opening 111 connected with the vertical cavity 11, and the locking slider 3 can be placed in the vertical cavity 11 from the upper opening 111; one side of the bracket 1 is provided with an opening 13 for the reset rod 22 to pass through, and the opening 13 is connected with one end of the horizontal cavity 12, and the other side of the bracket 1 is provided with an opening 121, and the opening 121 is connected with the other end of the horizontal cavity 12, and the pressing slider 21 can be placed in the horizontal cavity 12 from the opening 121. In addition, in this embodiment, the upper end of the bracket 1 is also provided with a horizontal connecting hole 16 connected to the vertical cavity 11. The horizontal connecting hole 16 is arranged parallel to the horizontal movement direction of the pressing slider 21, which can facilitate the insertion and sliding of the push-pull rod 5 and can be used to limit the position of the push-pull rod 5 in the vertical direction.

[0056] In one embodiment of the present invention, the locking structure 6 includes a buckle groove 61 and a buckle block 62 that buckle with each other. For example, in a specific embodiment, Figure 3 As shown, the upper surface of the locking slider 3 is concavely provided with a buckle groove 61, and the lower part of the push-pull rod 5 is provided with a plurality of buckle blocks 62 at intervals along the horizontal movement direction thereof. When one of the buckle blocks 62 on the push-pull rod 5 is inserted into the buckle groove 61 of the locking slider 3, the locking slider 3 and the push-pull rod 5 can be locked, thereby realizing the control of the horizontal movement position of the push-pull rod 5; in another specific embodiment, as Figure 4 As shown, a snap block 62 is convexly provided on the upper surface of the locking slider 3, and a plurality of snap grooves 61 are concavely provided at intervals along the direction of its horizontal movement on the lower portion of the push-pull rod 5. When the snap block 62 of the locking slider 3 is embedded in one of the snap grooves 61 on the push-pull rod 5, the locking slider 3 and the push-pull rod 5 can be locked, thereby realizing the control of the horizontal movement position of the push-pull rod 5.

[0057] In another embodiment of the present invention, Figure 1 and Figure 5 As shown, the locking structure 6 includes an internal thread groove 31 disposed on the upper portion of the locking slider 3 and an external thread rod 51 threadedly connected in the internal thread groove 31, and the external thread rod 51 is disposed on the push-pull rod 5. Through the threaded engagement structure, the locking slider 3 and the push-pull rod 5 are locked to achieve control of the horizontal movement position of the push-pull rod 5.

[0058] Specifically, in this embodiment, the external thread rod 51 has a trapezoidal thread tooth 511 that prevents the push-pull rod 5 from retreating out of the internal thread groove 31 of the locking slider 3. Figure 6As shown, the length of the retreat side 5111 of the trapezoidal thread tooth 511 is less than the length of the feed side 5112 of the trapezoidal thread tooth 511, that is, Figure 6 From the position in the figure, the direction in which the external threaded rod 51 moves to the left relative to the locking slider 3 is the feeding direction, and the direction in which the external threaded rod 51 moves to the right relative to the locking slider 3 is the retreating direction, then the side of the trapezoidal thread teeth 511 located on the feeding direction side is the feeding side edge 5112, and the side of the trapezoidal thread teeth 511 located on the retreating direction side is the retreating side edge 5111. The present invention sets the thread teeth of the external threaded rod 51 as trapezoidal thread teeth 511, and makes the length of the retreating side edge 5111 of the trapezoidal thread teeth 511 less than the length of the feeding side edge 5112 of the trapezoidal thread teeth 511, so that when the internal thread groove 31 of the locking slider 3 and the external threaded rod 51 of the push-pull rod 5 are in the locked state, the locking between the two can be more reliable, and the push-pull rod 5 can be prevented from slipping out of the internal thread groove 31 when the push-pull rod 5 is subjected to external force from the retreating direction, thereby preventing the locking from failing.

[0059] In one embodiment of the present invention, Figure 2 , Figure 7 and Figure 8 As shown, a horizontal connection hole 212 is provided in the pressing slider 21 of the reset mechanism 2. The horizontal connection hole 212 is parallel to the direction in which the pressing slider 21 moves horizontally in the horizontal cavity 12 of the bracket 1. A protrusion 2121 is radially provided in the horizontal connection hole 212. The reset rod 22 is provided with a sliding groove 221. An abutment ring 222 is provided at one end of the reset rod 22. The abutment ring 222 penetrates into the horizontal cavity 12 from the opening 13 of the bracket 1. A spring 223 is sandwiched between the abutment ring 222 and the outer wall of the bracket 1. The spring 223 is sleeved on the reset rod 22. The protrusion 2121 can be horizontally and elastically set in the sliding groove 221 through the spring 223. Fig. 9 As shown, the other end of the reset rod 22 is provided with a conversion opening groove 224 connected to the sliding groove 221, and the conversion opening groove 224 is arranged parallel to the sliding groove 221. When the reset rod 22 is inserted into the horizontal connection hole 212, the protrusion 2121 first passes through the conversion opening groove 224 to the end of the conversion opening groove 224 connected to the sliding groove 221. At this time, the reset rod 22 is rotated, and the protrusion 2121 slides from the conversion opening groove 224 into the sliding groove 221. With the horizontal movement of the reset rod 22, the protrusion 2121 can slide in the sliding groove 221. The present invention provides a conversion opening groove 224 connected to the sliding groove 221 on the reset rod 22, which, on the one hand, facilitates the combination of the protrusion 2121 and the sliding groove 221, and on the other hand, prevents the reset rod 22 from slipping out of the pressing slider 21 when sliding horizontally in the horizontal connection hole 212.

[0060] In a specific embodiment, please refer to Figure 8As shown, two protrusions 2121 are provided radially opposite to each other in the horizontal connection hole 212 of the pressing slide block 21; Figure 2 and Fig. 9 As shown, the other end of the reset rod 22 is radially oppositely provided with two sliding grooves 221 and two conversion opening grooves 224 connected to the corresponding sliding grooves 221. The present invention can make the reset rod 22 more firmly connected to the pressing slider 21 by sliding the sliding structure of the two sets of symmetrically arranged protrusions 2121 and the sliding grooves 221.

[0061] Further, such as Figure 8 and Fig.10 As shown, the reset rod 22 is provided with a convex introduction ridge 225, and the connection hole 212 of the pressing slider 21 is provided with an introduction groove 2122 that matches the introduction ridge 225. In this embodiment, two radially opposite introduction ridges 225 are provided on the reset rod 22, and two radially opposite introduction grooves 2122 are also provided in the horizontal connection hole 212 of the pressing slider 21. The two introduction ridges 225 on the reset rod 22 are alternately arranged with the two sliding grooves 221. The present invention provides the introduction ridge 225 on the reset rod 22, so that the reset rod 22 can more smoothly achieve the alignment and cooperation with the horizontal connection hole 212 of the pressing slider 21.

[0062] In one embodiment of the present invention, Figure 1 , Figure 7 and Fig.11 As shown, the upper surface of the pressing slider 21 is provided with an upper stepped inclined surface 213, and the lower surface of the locking slider 3 is provided with a lower stepped inclined surface 32, and the upper stepped inclined surface 213 cooperates with the lower stepped inclined surface 32. When the pressing slider 21 moves in the horizontal cavity 12 of the bracket 1, the upper stepped inclined surface 213 of the pressing slider 21 presses against the lower stepped inclined surface 32 of the locking slider 3, so that the locking slider 3 can be easily lifted from the vertical cavity 11 of the bracket 1 from bottom to top; at the same time, when the pressing slider 21 moves from the initial position of the horizontal cavity 12 to the position of the opening 121, the inclined surface between the upper stepped inclined surface 213 and the lower stepped inclined surface 32 cooperates, and it is also easier to make the locking slider 3 be pushed down from top to bottom in the vertical cavity 11 as the pressing plate 43 is pressed downward.

[0063] In a specific embodiment, the upper step inclined surface 213 is formed on an upper step protrusion 214 convexly provided on the upper surface of the pressing slider 21, and a guide groove 215 is provided in the middle of the upper step protrusion 214. The lower step inclined surface 32 is formed on a lower step protrusion 33 convexly provided on the lower surface of the locking slider 3, and a guide block 331 is provided on the lower step protrusion 33, and the guide block 331 is slidably provided in the guide groove 215. Through the alignment and cooperation of the guide block 331 and the guide groove 215, the cooperation between the pressing slider 21 and the locking slider 3 can be made more compact and the cooperation precision is higher.

[0064] In one embodiment of the present invention, Figure 1 As shown, the pressing handle 4 has two symmetrically arranged insertion plates 42, an arc-shaped pressing plate 43 is connected between the upper ends of the two insertion plates 42, the lower end of the insertion plate 42 is formed with the pressing slope 41, and the two sides of the pressing slider 21 are symmetrically provided with two reset slopes 211. By pressing down the arc-shaped pressing plate 43 of the pressing handle 4, the two insertion plates 42 move downward in the vertical cavity 11, so that the two pressing inclined surfaces 41 are respectively matched with the two reset inclined surfaces 211 of the pressing slide block 21, and the pressing handle 4 is continued to be pressed down. Under the downward force of the pressing inclined surface 41 on the reset inclined surface 211, the pressing slide block 21 moves from one end of the horizontal cavity 12 to the other end of the horizontal cavity 12, and the locking slide block 3 moves downward with the downward pressure of the pressing plate 43. At this time, its locking relationship with the push-pull rod 5 is released, and the push-pull rod 5 can move horizontally freely; when the downward pressing force on the pressing handle 4 is cancelled, the pressing slide block 21 is pulled back to one end of the horizontal cavity 12 under the action of the elastic restoring force of the spring 223 on the reset rod 22. Due to the return of the pressing slide block 21, the locking slide block 3 is pushed up in the vertical cavity 11 by the upper stepped inclined surface 213 of the pressing slide block 21 until it forms a locking relationship with the push-pull rod 5. In the present invention, reference is made to Figure 1 , Figure 2 and Figure 5 As shown, the two insertion plates 42 of the pressing handle 4 are respectively inserted into the vertical cavity 11 from the two through holes 33 arranged on both sides of the locking slider 3; further, limiting protrusions 421 are also provided on both sides of the insertion plate 42, and the limiting protrusions 421 can be pressed against the upper surface of the locking slider 3. When the locking slider 3 cannot fall smoothly in the vertical cavity 11, the limiting protrusions 421 can press against the locking slider 3 to make the locking slider 3 fall through external force, thereby ensuring the smooth unlocking of the locking slider 3 and the push-pull rod 5.

[0065] In one embodiment of the present invention, Fig.10 and Fig.11 As shown, two vertical grooves 14 connected to the vertical cavity 11 are symmetrically provided on both sides of the bracket 1, and two vertical stoppers 34 are symmetrically provided on both sides of the locking slider 3. When the locking slider 3 is placed into the vertical cavity 11 from the upper opening 111 of the bracket 1, the vertical stoppers 34 are embedded in the vertical grooves 14. The vertical grooves 14 can prevent the locking slider 13 from escaping from the bracket 1 when moving up and down in the vertical cavity 11.

[0066] In one embodiment of the present invention, Figure 8 and Fig. 9As shown, the bottom wall of the bracket 1 is provided with a horizontal groove 15 connected to the horizontal cavity 12, and the bottom of the pressing slider 21 is provided with a horizontal stopper 216, which is horizontally movable in the horizontal groove 15. After the pressing slider 21 is inserted into the horizontal cavity 12 from the opening 121, the horizontal stopper 216 will be embedded in the horizontal groove 15, so that when the pressing slider 21 reciprocates in the horizontal cavity 12, the pressing slider 21 is prevented from escaping from the horizontal cavity 12.

[0067] Implementation Method 2

[0068] like Figures 1 to 12 As shown, the present invention also provides a charging device, which includes a pusher, which is the pusher described in the first embodiment, and its structure, working principle and beneficial effects are the same as those in the first embodiment, and will not be repeated here. The charging device also includes a shell 10 and a locking joint 20, wherein: the shell 10 has a charging chamber 101 and a pushing chamber 102 that are connected, the pusher is arranged in the pushing chamber 102, one end of the push-pull rod 5 extends into the charging chamber 101, and the other end of the push-pull rod 5 is provided with a gripping handle 52; the locking joint 20 is connected to one end of the shell 10 through a connecting tube 201, and the connecting tube 201 is connected to the charging chamber 101 of the shell 10.

[0069] Specifically, the shell 10 is generally in the shape of a pistol, and a pressure chamber 101 is formed at the front end of the shell 10. In the present embodiment, a connecting tube 201 is connected to the outside of the front end of the shell 10, and a locking joint 20 that can be connected to a medical balloon is provided on the connecting tube 201, thereby ensuring that the liquid (such as contrast agent) in the pressure chamber 101 of the shell 10 is injected into the medical balloon through the connecting tube 201 and the locking joint 20; a pushing chamber 102 in which a pusher can be placed is formed at the rear end of the shell 10. When the pusher is placed into the pushing chamber 102 from the rear end of the shell 10, a sealing plate 103 is fixedly connected to the rear end of the shell 10 to achieve sealing of the shell 10.

[0070] Furthermore, a pressure gauge 104 is provided on the housing 10 , and the pressure gauge 104 is connected to the pressure charging chamber 101 . The pressure gauge 104 can be used to detect the liquid pressure in the pressure charging chamber 101 in real time.

[0071] In this embodiment, one end of the push-pull rod 5 of the pusher extending into the pressure chamber 101 is connected to a sealing rubber plug (not shown in the figure), and the sealing rubber plug is in sealing sliding contact with the inner wall of the housing 10. The provision of the sealing rubber plug can prevent the liquid in the pressure chamber 101 from leaking into the push chamber 102, and the provision of the sealing rubber plug can also facilitate the push-pull rod 5 to squeeze the liquid in the pressure chamber 101.

[0072] When the charging device is in use, by pressing the pressing handle 4 of the pusher, the pressing slider 21 moves from one end of the horizontal cavity 12 to the other end under the action of the two insertion plates 42 of the pressing handle 4. At this time, the locking slider 3 moves downward, releasing the locking relationship with the push-pull rod 5. The holding handle 52 of the push-pull rod 5 is held to pull the push-pull rod 5, and the liquid is drawn into the charging cavity 101 of the shell 10 by suction. This process is similar to the operation of extracting liquid with a medical syringe. When the charging cavity 101 is filled with a certain amount of liquid and the medical balloon needs to be injected with liquid, the holding handle 52 of the push-pull rod 5 is held to push the push-pull rod 5 in the direction of the charging cavity 101. For example, when the push-pull rod 5 is threadedly engaged with the locking slider 3, the holding handle 52 of the push-pull rod 5 is rotated to achieve the purpose of moving the push-pull rod 5 toward the charging cavity 101, thereby realizing the liquid filling operation of the medical balloon. When there is no need to move the push-pull rod 5, the downward pressure on the pressing handle 4 is released, and the pressing slider 21 moves from the other end of the horizontal cavity 12 to the initial position under the action of the elastic restoring force of the spring 223 on the reset rod 22. At this time, the locking slider 3 moves upward under the action of the pressing slider 21, and then locks with the push-pull rod 5, fixing the push-pull rod 5 to a required position.

[0073] The charging device of the present invention can realize the locking and unlocking operations of the push-pull rod 5 under the condition of single-handed operation through the pusher. The charging device improves the convenience of the operator and makes the operation more flexible and convenient.

[0074] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A pusher for a charging device, characterized in that: The pusher comprises: A bracket having a vertical cavity and a horizontal cavity connected to each other; A reset mechanism, comprising a pressing slider and a reset rod, wherein the pressing slider is horizontally movably disposed in the horizontal cavity, and the reset rod is horizontally movably connected to the pressing slider; A locking slider abuts against the upper end of the pressing slider, and the locking slider is disposed in the vertical cavity so as to be movable up and down according to the horizontal movement of the pressing slider; A pressing handle can be inserted into the vertical cavity, a pressing slope is formed at the lower end of the pressing handle, and the pressing slope abuts against the reset slope on the pressing slider; wherein the pressing handle has two symmetrically arranged insertion plates, the pressing slope is formed at the lower end of the insertion plates, and two reset slopes are symmetrically arranged on both sides of the pressing slider; A push-pull rod is horizontally movable and is arranged above the locking slide block. A locking structure is arranged between the push-pull rod and the locking slide block.

2. The pusher of the charging device according to claim 1, characterized in that: The locking structure comprises an internal thread groove arranged at the upper part of the locking slide block and an external thread rod threadedly connected in the internal thread groove, and the external thread rod is arranged on the push-pull rod.

3. The pusher of the charging device according to claim 2, characterized in that: The external thread rod has a trapezoidal thread tooth that prevents the push-pull rod from retreating from the internal thread groove, and the length of the retreat side of the trapezoidal thread tooth is smaller than the length of the feed side of the trapezoidal thread tooth.

4. The pusher of the charging device according to claim 1, characterized in that: The locking structure includes a locking groove and a locking block that lock with each other, the locking groove is recessed on the upper surface of the locking slider, and a plurality of the locking blocks are spaced apart at a lower portion of the push-pull rod along the direction of its horizontal movement; or the locking block is protrudingly provided on the upper surface of the locking slider, and a plurality of the locking grooves are recessed at a lower portion of the push-pull rod along the direction of its horizontal movement.

5. The pusher of the charging device according to claim 1, characterized in that: A horizontal connecting hole is provided in the pressing slider of the reset mechanism, a protrusion is provided in the horizontal connecting hole, and a sliding groove is provided on the reset rod; an abutment ring is provided at one end of the reset rod, a spring is clamped between the abutment ring and the bracket, the spring is sleeved on the reset rod, and the protrusion can be elastically arranged in the sliding groove through the spring.

6. The pusher of the charging device according to claim 5, characterized in that: The other end of the reset rod is provided with a conversion opening groove connected with the sliding groove, the conversion opening groove is arranged parallel to the sliding groove, and the protrusion is inserted into the sliding groove through the conversion opening groove.

7. The pusher of the charging device according to claim 5 or 6, characterized in that: The reset rod is provided with a guide edge protruding thereon, and the connecting hole is provided with a guide groove matched with the guide edge.

8. The pusher of the charging device according to claim 1, characterized in that: An upper stepped slope is provided on the upper surface of the pressing slider, and a lower stepped slope is provided on the lower surface of the locking slider, wherein the upper stepped slope matches the lower stepped slope.

9. The pusher of the charging device according to claim 8, characterized in that: The upper step inclined surface is formed on an upper step protrusion convexly provided on the upper surface of the pressing slider, and a guide groove is provided on the upper step protrusion. The lower step inclined surface is formed on a lower step protrusion convexly provided on the lower surface of the locking slider, and a guide block is provided on the lower step protrusion. The guide block can be slidably arranged in the guide groove.

10. The pusher of the charging device according to claim 1, characterized in that: Two vertical grooves in communication with the vertical cavity are symmetrically arranged on both sides of the bracket, and two vertical limit blocks are symmetrically arranged on both sides of the locking slider. The vertical limit blocks can be slidably arranged in the vertical grooves.

11. The pusher of the charging device according to claim 1, characterized in that: The bottom wall of the bracket is provided with a horizontal groove which is in communication with the horizontal cavity, and the bottom of the pressing slider is provided with a horizontal limit block which can be horizontally movably arranged in the horizontal groove.

12. A charging device, characterized in that: It comprises the pusher according to any one of claims 1 to 11, and the charging device further comprises: The housing has a pressurizing chamber and a pushing chamber connected to each other, the pusher is arranged in the pushing chamber, one end of the push-pull rod extends into the pressurizing chamber, and the other end of the push-pull rod is provided with a gripping handle; A locking joint is connected to one end of the shell through a connecting pipe, and the connecting pipe is communicated with the pressure charging chamber of the shell.

13. The charging device according to claim 12, characterized in that The pressure charging device is provided with a pressure gauge, and the pressure gauge is communicated with the pressure charging chamber.

14. The charging device according to claim 13, characterized in that One end of the push-pull rod extending into the pressure-charging chamber is connected with a sealing rubber plug, and the sealing rubber plug is in sealing and sliding contact with the inner wall of the shell.

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