A bone wax smear gun with adjustable strength

Abstract

The present invention provides a bone wax smearing gun with adjustable strength, comprising a gun body, a gun head, an ejection mechanism, a driving mechanism, a launching mechanism and an adjusting mechanism. The driving mechanism is used to drive an ejection part of the ejection mechanism to move backward, and the ejection part stores energy when moving backward. The launching mechanism is used to lock or release the ejection part. When the trigger of the launching mechanism is pulled, the ejection mechanism is released, and the ejection part moves forward to eject bone wax from the gun head; the adjusting mechanism is arranged in the gun body, and the adjusting mechanism is used to adjust the backward movement distance of the ejection part to change the strength of the bone wax ejected from the gun head, thereby realizing controllable strength of the bone wax ejected from the gun head. Therefore, under different bone surface surrounding environments, the surgeon can independently adjust the strength of the bone wax ejection according to the environmental conditions, to ensure that the bone wax can be stably smeared on the bone surface without falling each time it is ejected, thereby achieving an effective hemostasis effect, thereby improving efficiency and reducing operation time.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a bone wax smear gun with adjustable strength. Background Art

[0002] Bone wax is a material that physically blocks capillary bleeding in the bone marrow and is used to stop bleeding in emergency patients. To use bone wax, press and apply it to the bleeding bone surface.

[0003] Currently, bone wax is applied to bone surfaces during orthopedic surgery to stop bleeding. Using a nerve stripping ruler or curved forceps, a small piece of bone wax is applied. However, if blood or other tissue fluid is present on the bone surface, the wax can become unstable and fall off. Furthermore, if the bone surface is uneven, the application and hemostasis effect are often poor. Furthermore, using nerve stripping rulers and curved forceps can be difficult to control the angle and force of application, making the procedure cumbersome and inefficient, prolonging surgery time, and increasing intraoperative bleeding.

[0004] In the prior art, as publication number is the utility model patent CN216725500U, it discloses a kind of bone wax smearing gun, although can replace the tools such as above-mentioned nerve stripping ruler, curved forceps, thereby improves operating efficiency, makes operation simple and quick.But, due to the different environments around the bone surface, the smearing power that bone wax is smeared onto the bone surface also will be differentiated to some extent, just can ensure that the bone wax smeared is stable and will not fall, can reach effective hemostatic effect, such as when the bone surface is filled with blood or other tissue fluids around, so the power and speed that bone wax is ejected will be larger at this moment; And when there is no tissue fluid around the bone surface, so the power and speed that bone wax is ejected can be smaller.But bone wax smearing gun in the prior art, they are fixed by the power that bone wax is ejected or ejected to the bone surface bleeding position, therefore also be difficult to meet the demand of different surgical environments.

[0005] Therefore, it is very necessary to develop a bone wax smear gun with adjustable strength. Summary of the Invention

[0006] The purpose of the present invention is to provide a bone wax smear gun with adjustable strength to address the above-mentioned problems and shortcomings, so as to effectively solve the problem that the existing bone wax injection strength cannot be adjusted.

[0007] The technical solution of the present invention is achieved as follows:

[0008] The bone wax smear gun of the present invention comprises a gun body and a gun head, the gun head is connected to the front end of a barrel of the gun body, and the bone wax is filled in the inner cavity of the gun head near the front end, and is characterized in that it also includes an ejection mechanism, the ejection mechanism is arranged in the gun barrel, the ejection mechanism includes an ejection member, when the ejection member moves backward, the ejection mechanism stores energy, and when the ejection member moves forward, the bone wax is ejected from the gun head; a driving mechanism, the driving mechanism is arranged in the gun barrel, and the driving mechanism is used to drive the ejection member to move backward and store energy; a launching mechanism, the launching mechanism is used to lock or release the energy storage state of the ejection member, when the trigger of the launching mechanism is pulled, the energy storage state of the ejection mechanism is released, the ejection member moves forward to eject the bone wax from the gun head; an adjusting mechanism, the adjusting mechanism is arranged in the gun body, and the adjusting mechanism is used to adjust the backward movement distance of the ejection member to change the force of the bone wax ejected from the gun head.

[0009] In some embodiments, the ejection mechanism also includes an air cylinder and an energy storage spring, and the ejection part corresponds to a piston rod. The front end of the piston rod is provided with a piston to fit airtightly with the inner wall of the air cylinder, and the rear end rod body of the piston rod is connected to the driving mechanism to enable the driving mechanism to drive the piston rod to move backward and store energy; the energy storage spring is sleeved on the piston rod, and the two ends of the energy storage spring respectively press against the position between the rear end face of the piston and the rear end face wall of the air cylinder.

[0010] In some embodiments, the driving mechanism includes a driving motor and a driving gear, and the rotating shaft gear of the driving motor is engaged with the driving gear; the ejection member is provided with a rack, and the rack is engaged with the driving gear. When the driving motor is started, the ejection member is driven to move backward.

[0011] Furthermore, the adjustment mechanism includes an adjustment knob and a control circuit, the adjustment knob is arranged on the outside of the gun body, the adjustment knob is electrically connected to the control circuit, the drive motor is electrically connected to the control circuit, and the control circuit controls the starting duration of the drive motor according to the adjustment position of the adjustment knob.

[0012] In some embodiments, the driving mechanism also includes a driving box, a lifting motor and a threaded rod, the driving motor and the driving gear are installed in the driving box, the driving box can be installed in the gun body so as to move up and down, the lifting motor is fixedly installed in the gun body, one end of the threaded rod is connected to the rotating shaft of the lifting motor, and the other end of the threaded rod is screwed into the threaded hole opened on the driving box, and the lifting motor drives the threaded rod to rotate when it is started, and the threaded rod then drives the driving box to move up and down; when the driving box moves downward to the set lower limit position, the driving gear engages with the rack; when the driving box moves upward to the set upper limit position, the driving gear disengages from the rack.

[0013] In some embodiments, the driving mechanism also includes a start button, which is arranged on the handle on the outside of the gun body. After the start button is pressed, the lifting motor drives the drive box to move downward. When the drive box moves downward to the lower limit position, the lifting motor stops rotating and the drive motor drives the drive gear to rotate. When the drive motor stops rotating, the lifting motor starts to reverse and drives the drive box to move up to the upper limit position.

[0014] In some embodiments, the launching mechanism includes the trigger and the pawl structure, and the ejection member is correspondingly provided with a ratchet. After the ejection member moves backward to the set position, the pawl structure engages with the ratchet to fix the ejection member at the set position. When the trigger is pulled, the pawl structure is disengaged from the ratchet, and the ejection member is released from the stored energy state and ejected forward.

[0015] Furthermore, the pawl structure includes a pawl plate, a pawl and a torsion spring. The pawl is connected to the pawl plate in a unidirectional manner through a pin shaft, and the torsion spring is sleeved on the pin shaft so that the pawl can automatically reset after rotation; when the ejection member moves backward, the ratchet moves backward and pushes the pawl to rotate and avoid; when the ejection member moves backward to the set position, the pawl is reset under the action of the torsion spring and engages with the ratchet tooth opposite to it.

[0016] Furthermore, a placement position is provided in the gun body, a first connection position is provided at the placement position, the pawl disk is placed on the placement position, a second connection position is provided on the pawl disk, and the two ends of the tension spring are respectively connected to the first connection position and the second connection position to enable the pawl disk to move elastically up and down in the placement position.

[0017] In some embodiments, the launching mechanism further includes a push plate, which cooperates with the trigger to drive the push plate to move backward when the trigger is pulled, and the upper part of the push plate extends into the placement position and is located below the pawl plate, the bottom of the pawl plate is downwardly protruding with a wedge block that abuts against the push plate, and the upper part of the push plate is correspondingly provided with a wedge-shaped recess that cooperates with the wedge block; when the trigger is not pulled, the wedge-shaped recess of the push plate is separated from the wedge block, the pawl plate is pushed upward, and the tension spring is stretched, at this time the pawl cooperates with the ratchet; when the trigger is pulled, the push plate moves backward to cause the wedge-shaped recess to move below the wedge block, the tension spring pulls the wedge block downward into the wedge recess, and the pawl plate moves downward at the same time, at this time the pawl disengages from the ratchet.

[0018] The beneficial effects of the present invention are:

[0019] Since the present invention is provided with an adjustment mechanism, the backward movement distance of the ejection member of the ejection mechanism can be adjusted and controlled by the adjustment mechanism, thereby achieving controllable force of the bone wax ejected from the gun head. Therefore, under different bone surface surrounding environments, the surgeon can independently adjust the force of the bone wax ejection according to the environmental conditions, ensuring that each time the bone wax is ejected, it can be stably applied to the bone surface without falling off, achieving an effective hemostatic effect, thereby improving efficiency and reducing operation time.

[0020] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the bone wax smear gun with adjustable strength of the present invention;

[0022] Figure 2 This is a schematic diagram of the exploded structure of the bone wax smear gun with adjustable strength of the present invention;

[0023] Figure 3 is a schematic diagram of the exploded structure of an ejection mechanism according to one embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the exploded structure of a launching mechanism according to one embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of the exploded structure of a driving mechanism according to one embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the exploded structure of an adjustment mechanism according to one embodiment of the present invention;

[0027] Figure 7This is a schematic structural diagram of a driving mechanism in an initial state according to one embodiment of the present invention;

[0028] Figure 8 This is a structural schematic diagram of a driving mechanism in one embodiment of the present invention at a lower limit position;

[0029] Figure 9 This is a structural schematic diagram of a piston rod in a state of maximum force storage according to one embodiment of the present invention;

[0030] Figure 10 This is a schematic structural diagram of the trigger being pulled down in accordance with one embodiment of the present invention.

[0031] Reference numerals:

[0032] Gun body 1;

[0033] Left housing 11, right housing 12, barrel 13, handle 14, drive seat 15, through hole 16, motor seat 17, placement position 18, first connection position 19;

[0034] Gun head 2;

[0035] Ejection mechanism 3;

[0036] Air cylinder 31, piston 32, piston rod 33, rack 34, ratchet 35, energy storage spring 36;

[0037] Driving mechanism 4;

[0038] Drive motor 41, shaft gear 42, drive gear 43, drive box 44, lift motor 45, threaded rod 46, start button 47, threaded hole 48;

[0039] Launching mechanism 5;

[0040] Trigger 51, pawl 52, pawl plate 53, second connecting position 54, wedge block 55, torsion spring 56, push plate 57, wedge-shaped recess 58, tension spring 59;

[0041] Adjustment mechanism 6;

[0042] Adjustment knob 61, control circuit 62;

[0043] Return spring 7;

[0044] Battery box 8;

[0045] Circuit board 9. DETAILED DESCRIPTION

[0046] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0047] In the description of the present invention, it should be understood that the terms "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish between the features, without distinction of order or importance.

[0048] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "match," "connect," "connect," and "install" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0050] The bone wax smear gun with adjustable strength of the present invention will be described below with reference to the accompanying drawings.

[0051] like Figure 1 and Figure 2As shown, the present invention relates to a bone wax smearing gun with adjustable strength, comprising a gun body 1 and a gun head 2, wherein the gun head 2 is connected to the front end of a gun barrel 13 of the gun body 1, and bone wax is filled in an inner cavity near the front end of the gun head 2. In addition, the gun body 1 also includes an ejection mechanism 3, which is arranged in the gun barrel 13. The ejection mechanism 3 includes an ejection part. When the ejection part moves backward, the ejection mechanism 3 stores energy, and when the ejection part moves forward, the bone wax is ejected from the gun head 2. Therefore, there is no need to perform cumbersome operations like tools such as nerve stripping rulers and curved pliers. It is only necessary to align the front end of the gun head 2 with the bone surface and use the force generated by the forward movement of the ejection part to eject the bone wax onto the bone surface. The operation is convenient and efficient. There is also a driving mechanism 4, which is arranged in the barrel 13 and is used to drive the ejection member to move backward to store energy; a launching mechanism 5, which is used to lock or release the stored energy state of the ejection member. When the trigger 51 of the launching mechanism 5 is pulled, the stored energy state of the ejection mechanism 3 is released, and the ejection member can be moved forward to eject the bone wax from the gun head 2, without the need for the surgeon to manually apply the bone wax.

[0052] To achieve a better effect, the present invention further includes an adjustment mechanism 6 disposed within the gun body 1. The adjustment mechanism 6 is used to adjust the backward movement distance of the ejection member. Specifically, the further the ejection member moves backward, the greater the energy stored. Consequently, when the trigger 51 is pulled, the ejection member is ejected forward with greater force and speed, thereby increasing the force with which the bone wax is ejected from the gun head 2. Therefore, the adjustment mechanism 6 can be used to adjust and control the force with which the bone wax is ejected from the gun head 2. The surgeon can independently adjust the force of the bone wax ejection according to the surrounding conditions, ensuring that each ejection of the bone wax is stably applied to the bone surface without falling off, achieving an effective hemostatic effect, thereby improving efficiency and reducing surgical time.

[0053] It is understandable that the diameter of the gun head 2 must be relatively small because, when in use, the gun head 2 is inserted into the body of the surgical patient so that the front opening of the gun head 2 is close to and aligned with the bone surface to which bone wax is applied. The gun head 2 of the present invention can be integrally formed with the gun body 1, but in order to save resources and achieve recyclability, in some embodiments, the gun head 2 and the gun body 1 are detachably connected. The connection method can be a tight plug-in, a threaded connection, a snap-on connection, etc. As long as the connection method is airtight and can be replaced, any connection method is acceptable. With such a design, after the operation is completed, the gun head 2 only needs to be removed and discarded, and the gun body 1 is partially disinfected, and a new gun head 2 can be installed before the next operation for continuous use. Therefore, resources can be saved and surgical costs can be reduced. Moreover, different gun tips 2 can be selected according to the position of the bone surface where the bone wax needs to be applied. For example, if the bone surface is at a deeper position or on the lower side surface, a gun tip 2 with an arc-shaped front end can be selected; for example, if the bleeding point on the bone surface is on the upper surface or the upper side surface, a gun tip 2 with a straight tube as a whole can be selected; and so on.

[0054] The bone wax filling method of the present invention is manual filling, that is, before the operation, the operator first takes a portion of bone wax from the front opening of the gun head 2 and fills it into the inner cavity of the gun head 2 for use. As a better choice, the bone wax filling method can be automatic filling, and each time the driving mechanism 4 performs the energy storage of the ejection mechanism 3, the bone wax is automatically filled.

[0055] The ejection mechanism 3 of the present invention also includes a gas cylinder 31 and an energy storage spring 36. The gas cylinder 31 is an integrally formed circular cylinder, which is arranged in the barrel 13 of the gun body 1. The front end opening diameter of the gas cylinder 31 is consistent with the inner diameter of the cylinder, and the rear end opening diameter of the gas cylinder 31 is smaller than the inner diameter of the cylinder, so a rear end wall is formed at the rear end. The ejection element corresponds to a piston rod 33, with a piston 32 at its front end. The outer diameter of the piston 32 is the same as the inner diameter of the cylinder body. The piston rod 33 is a rectangular column that can pass through the rear opening of the cylinder 31. During installation, the rear end of the piston rod 33 is inserted into the front opening of the cylinder 31 and then extended out of the rear opening of the cylinder 31. After installation, the piston 32 is airtightly fitted with the inner wall of the cylinder 31. The rear end of the piston rod 33 that extends outside the cylinder 31 is connected to the drive mechanism 4. An energy storage spring 36 is sleeved on the piston rod 33, and the two ends of the energy storage spring 36 respectively abut the position between the rear end surface of the piston 32 and the rear end wall of the cylinder 31. Therefore, when the piston rod 33 moves backward, the energy storage spring 36 is compressed, thereby storing energy, that is, the drive mechanism 4 drives the piston rod 33 to move backward and store energy. The further the piston rod 33 moves backward, the more severely the energy storage spring 36 is compressed, and the greater the energy stored. Of course, in addition to using the energy storage spring 36 to store energy, energy storage can also be achieved through air pressure. By adjusting the gas pressure in front of the piston 32 and behind the piston 32 in the air cylinder 31, the amount of energy storage can be adjusted, and the backward movement and forward push of the piston rod 33 can be achieved.

[0056] The driving mechanism 4 of the present invention can be manually driven, that is, the surgeon pulls the piston rod 33 backward to store energy; it can also be driven by air pressure or hydraulic pressure; but more preferably, in order to enable the surgeon to operate the bone wax smear gun with one hand and without effort to improve efficiency, the driving mechanism 4 of the more preferred embodiment includes a driving motor 41 and a driving gear 43, and the rotating shaft gear 42 of the driving motor 41 is engaged with the driving gear 43; a rack 34 is provided on the ejection part, and the rack 34 is engaged with the driving gear 43. When the driving motor 41 is started, the ejection part is driven to move backward.

[0057] Specifically, such as Figure 8In the example shown, the ejection member is a piston rod 33, a rack 34 is directly provided on the upper surface of the piston rod 33, and a drive gear 43 is meshed with the rack 34. When the piston 32 of the piston rod 33 is at the most forward position in the cylinder 31, the drive gear 43 is meshed with the teeth at the rear end of the rack 34; Figure 9 As shown, when the piston 32 of the piston rod 33 is at the rearmost position in the cylinder 31, the drive gear 43 is engaged with the teeth at the front end of the rack 34. At this time, the energy storage spring 36 has the maximum energy storage, and the force of bone wax injection is also the maximum.

[0058] The regulating mechanism 6 of the present invention can be as follows Figure 5 In the example shown, the adjustment mechanism 6 of this example includes an adjustment knob 61 and a control circuit 62. The adjustment knob 61 is arranged on the outside of the gun body 1, so that the fingers of the hand holding the bone wax smear gun in the operating hospital can reach it for adjustment. The adjustment knob 61 is electrically connected to the control circuit 62, and the drive motor 41 is electrically connected to the control circuit 62. The control circuit 62 controls the starting time of the drive motor 41 according to the adjustment position of the adjustment knob 61. For example, when the surgeon finds that the surgical bone surface needs to be smeared with bone wax and there is tissue fluid around the bone surface, the force required to eject the bone wax is relatively large. In this case, the surgeon can use his finger to turn the adjustment knob 61 to the position where the pointer points to a larger force. At this time, the control circuit 62 obtains the time signal corresponding to the position of the pointer, and then controls the drive motor 41 to start, the drive motor 41 drives the drive gear 43 to rotate, the drive gear 43 drives the rack 34 to move backward, and the piston rod 33 starts to compress the energy storage spring 36 to store energy. When the driving motor 41 works for the same time as the time signal, the control circuit 62 controls the drive motor 41 to stop working, the piston rod 33 stops moving backward, and at this time, when the piston rod 33 stops, the stored force of the energy storage spring 36 just meets the force required for the bone wax to be ejected. The adjustment mechanism 6 of this example is simple to adjust, sensitive to control, and not prone to errors and failures.

[0059] It is understood that the adjustment knob 61 can be infinitely adjustable, meaning that the adjustment knob 61 can be rotated to any desired position and stopped. Of course, in some embodiments, the adjustment knob 61 can also be designed with gears, such as small, medium, and large, with each gear corresponding to a different operating time for the control drive motor 41. Furthermore, the adjustment knob 61 can also be replaced by a button or a push button. A button can only achieve adjustment with specific gears, while a push button, like a knob, can be infinitely adjusted and also has specific gears.

[0060] In addition to using an adjustment knob 61 and a control circuit 62, the adjustment mechanism 6 of the present invention can also employ a mechanical stop adjustment method. For example, a touch rod can be provided on the side wall of the ejection member, and the adjustment mechanism 6 can be a touch plate that can be moved forward and backward, and a contact switch is provided on the touch plate. The axis of the contact switch is aligned with the axis of the touch rod, and the contact switch is electrically connected to the drive motor 41. During use, the touch plate is manually moved back to the desired position, and the drive motor 41 begins to drive the ejection member back. When the ejection member moves back to the point where its touch rod contacts the contact switch, the drive motor 41 is controlled to stop rotating, thereby achieving controllable rearward movement distance of the ejection member. Of course, other adjustment control methods are also possible.

[0061] In order to improve the performance of the ejection member when ejecting forward, reduce unnecessary resistance as much as possible, and better protect the drive mechanism 4 and increase its service life, in some embodiments, the drive mechanism 4 further includes a drive box 44, a lifting motor 45, and a threaded rod 46. The drive motor 41 and the drive gear 43 are installed in the drive box 44. The drive box 44 is installed in the gun body 1 so as to be movable up and down. The lifting motor 45 is fixed in the gun body 1. One end of the threaded rod 46 is connected to the rotating shaft of the lifting motor 45, and the other end of the threaded rod 46 is screwed into the threaded hole 48 provided on the drive box 44. Therefore, when the lifting motor 45 is started, the threaded rod 46 is driven to rotate, and the threaded rod 46 then drives the drive box 44 to move up and down.

[0062] Specifically, if Figure 2In the example shown, the gun body 1 in this example includes a left shell body 11 and a right shell body 12. Since the rack 34 of the piston rod 33 is arranged on the upper end surface of the rod body, a drive seat 15 for placing a drive box 44 is provided at the upper end of the right shell body 12 of the gun body 1. After the drive box 44 is placed on the drive seat 15, it can only move in the up and down directions of the drive seat 15; the right half of the drive box 44 is used to place the drive motor 41, and the shaft gear 42 of the drive motor 41 is exposed outside the side wall of the drive box 44. The drive gear 43 is fixed to the side wall of the left half of the drive box 44 by bolts to engage with the shaft gear 42. A threaded hole 48 is provided through the middle of the left half of the box 44 from top to bottom. A through hole 16 with a diameter larger than the threaded hole 48 is provided on the drive seat 15 at a position corresponding to the threaded hole 48. The upper end of the threaded rod 46 passes through the through hole 16 from below, then screws into the threaded hole 48 from below and passes out from above to achieve connection with the threaded hole 48; the lower end of the threaded rod 46 is fixedly connected to the rotating shaft of the lifting motor 45 so that the rotating shaft drives the threaded rod 46 to rotate synchronously. A motor seat 17 is also provided on the right shell body 12 directly below the through hole 16 of the drive seat 15, and the lifting motor 45 is fixedly inserted into the motor seat 17. When the lifting motor 45 drives the drive box 44 to move downward to the set lower limit position (that is, the position when the lower surface of the drive box 44 contacts the supporting surface of the drive seat 15), the driving gear 43 is just in a position engaged with the rack 34, as shown in FIG. Figure 8 When the lifting motor 45 drives the drive box 44 to move upward to the set upper limit position, the drive gear 43 is disengaged from the rack 34, as shown Figure 7 shown.

[0063] In addition to using a lifting mechanism for the drive box 44, in other embodiments, a clutch mechanism may be employed between the drive gear 43 and the motor. For example, the drive mechanism 4 may include a movable clutch gear between the shaft gear 42 and the drive gear 43. This clutch gear is always in mesh with the shaft gear 42, but can be engaged or disengaged with the drive gear 43. When the drive motor 41 rotates, it drives the clutch gear to a position where it engages with the drive gear 43. The drive gear 43 then rotates, driving the ejection element to move backward and accumulate energy. When the ejection element is triggered forward by the launch mechanism 5, the ejection element's rack 34 also moves forward, causing the drive gear 43 to rotate in the opposite direction. This reverse rotation of the drive gear 43 disengages the clutch gear, preventing the reverse rotational force from being transmitted to the motor shaft, thereby protecting the motor from damage. Of course, the drive gear 43 may also be designed as a clutch gear, eliminating the need for an additional clutch gear. In addition, other methods can be used to reduce the ejection element's ejection resistance.

[0064] In order to achieve better control performance and operational effects, in some embodiments, the drive mechanism 4 further includes a start button 47, which is disposed on the handle 14 outside the gun body 1. The drive mechanism 4 will not start operating until the start button 47 is pressed. Otherwise, even if the adjustment mechanism 6 is adjusted, the drive mechanism 4 will temporarily be in a standby state. When the drive mechanism 4 is in the standby state, the drive box 44 is in the upper limit position, that is, the drive gear 43 is disengaged from the rack 34. When the start button 47 is pressed, the lifting motor 45 rotates forward to drive the drive box 44 downward. When it reaches the lower limit position, the lifting motor 45 stops rotating, and the drive motor 41 starts to drive the drive gear 43 to rotate. When the ejection member moves back to the set position, the drive motor 41 stops rotating, and the lifting motor 45 starts again, and reverses to drive the drive box 44 upward to the upper limit position.

[0065] The launching mechanism 5 of the present invention can not only launch the ejection member forward, but also lock the ejection member in position when it moves backward to store energy. The structure used to lock the ejection member in the energy storage position can be a pawl structure, a stretching structure, a latch structure, etc.

[0066] In such Figure 4 In the example shown, the launching mechanism 5 of the example includes a trigger 51 and a pawl structure, and a ratchet 35 is correspondingly provided on the ejection member. After the ejection member moves back to the set position, the pawl structure engages with the ratchet 35 to fix the ejection member in the set position. When the trigger 51 is pulled, the trigger 51 will drive the pawl structure to disengage the ratchet 35, and the ejection member will release the stored energy state and eject forward.

[0067] Specifically, the ejection element in this example is a piston rod 33, with ratchet teeth 35 located on the lower surface of the piston rod 33 and a rack 34 on the upper surface, preventing interference. When the ratchet structure engages with the ratchet teeth 35 at the rearmost end of the piston rod 33, the piston rod 33 stores minimal force, which in turn minimizes the ejection force of the bone wax. When the ratchet structure engages with the ratchet teeth 35 at the frontmost end of the piston rod 33, the piston rod 33 stores maximum force, which in turn maximizes the ejection force of the bone wax.

[0068] In order to prevent the ratchet 35 from colliding hard with the pawl structure during the rearward movement of the ejection member and causing easy damage, in some embodiments, the pawl structure includes a pawl plate 53, a pawl 52 and a torsion spring 56. The pawl 52 is connected to the pawl plate 53 in a unidirectional manner through a pin shaft, and the torsion spring 56 is sleeved on the pin shaft so that the pawl 52 can automatically reset after rotation; when the ejection member moves rearward, the ratchet 35 moves rearward and hits the pawl 52. At this time, the pawl 52 will be pushed to overcome the elastic force of the torsion spring 56 and rotate backward in a unidirectional manner, thereby making the pawl 52 avoid. In this way, the pawl 52 or the ratchet 35 will not be easily damaged by long-term hard collisions, nor will it cause the ejection member to be stuck and unable to move rearward. Figure 8 As shown; when the ejection member moves back to the set position and stops, the pawl 52 is reset and stands up under the action of the torsion spring 56, and engages with the ratchet 35 opposite to it. At this time, since the ejection member has a tendency to eject forward, that is, the ratchet 35 will move forward, but since the pawl 52 cannot rotate forward and lie down, the ratchet 35 is locked in this position, that is, the ejection member is locked in the energy storage position, as shown. Figure 9 shown.

[0069] The present invention can lock the ejection member when the trigger 51 is pulled, that is, the pawl 52 can be disengaged from the ratchet 35 when the trigger 51 is pulled. There are many ways to achieve this function, such as driving the pawl 52 to rotate forward and lie down when the trigger 51 is pulled, or driving the pawl 52 to move downward and disengage from the ratchet 35 when the trigger 51 is pulled, or driving the pawl 52 to move left or right out of the position where the ratchet 35 is located when the trigger 51 is pulled.

[0070] In such Figure 2 In the illustrated example, a placement position 18 is provided within the gun body 1, a first connection position 19 is provided at the placement position 18, a pawl plate 53 is placed on the placement position 18, a second connection position 54 is provided on the pawl plate 53, and both ends of a tension spring 59 are respectively connected to the first connection position 19 and the second connection position 54, so that the pawl plate 53 can elastically move up and down in the placement position 18. When the trigger 51 is pulled, the tension spring 59 drives the pawl plate 53 downward, the pawl 52 disengages the ratchet teeth 35, and the ejection member is ejected forward; when the trigger 51 is released, the pawl plate 53 is driven upward to reset; alternatively, when the trigger 51 is pulled, the pawl plate 53 is driven downward, the pawl 52 disengages the ratchet teeth 35, and the ejection member is ejected forward; when the trigger 51 is released, the tension spring 59 drives the pawl plate 53 upward to reset.

[0071] Furthermore, the firing mechanism 5 of this example also includes a push plate 57, which cooperates with the trigger 51 to drive the push plate 57 to move backward when the trigger 51 is pressed. The upper part of the push plate 57 extends into the placement position 18 and is located below the pawl plate 53. The bottom of the pawl plate 53 is provided with a wedge block 55 protruding downward to abut against the push plate 57, and the upper part of the push plate 57 is correspondingly provided with a wedge-shaped recess 58 that cooperates with the wedge block 55; when the trigger 51 is not pressed, the wedge-shaped recess 58 of the push plate 57 is separated from the wedge block 55, and the bottom of the wedge block 55 is pressed against the upper plate of the push plate 57, so the pawl plate 53 is pushed upward, and at this time the tension spring 59 is stretched, and the pawl 52 cooperates with the ratchet 35, as shown in FIG. Figure 9 As shown; when the trigger 51 is pressed, the push plate 57 moves backward so that the wedge-shaped recess 58 moves to just below the wedge block 55. At this time, the tension spring 59 pulls the wedge block 55 downward into the wedge-shaped recess 58, so the pawl plate 53 also moves downward synchronously, so that the pawl 52 is disengaged from the ratchet 35, as shown Figure 10 In order to achieve automatic resetting of the trigger 51, a spring may be provided at the rear end of the trigger 51 to reset it, or a spring may be provided at the rear end of the push plate 57 to drive the push plate 57 and the trigger 51 to reset simultaneously.

[0072] like Figure 2 As shown, the handle 14 of the gun body 1 of the present invention is also provided with a battery box 8 and a circuit board 9. The battery in the battery box 8 can be an ordinary cylindrical battery or a rechargeable lithium battery block, etc. The circuit board 9 is electrically connected to the battery box 8 and each motor and the start button 47 to achieve controllable power supply.

[0073] The following is a detailed description of a specific embodiment.

[0074] like Figures 1-10 As shown, the bone wax smearing gun with adjustable strength of this embodiment includes a gun body 1, a gun head 2, an ejection mechanism 3, a driving mechanism 4, a launching mechanism 5, and an adjusting mechanism 6, wherein the gun head 2 is detachably and replaceably connected to the front end of the barrel 13 of the gun body 1, and the bone wax is filled in the inner cavity near the front end of the gun head 2, and other mechanisms are installed in the gun body 1.

[0075] The ejection mechanism 3 includes a piston rod 33 as an ejection member, an air cylinder 31 and an energy storage spring 36. A piston 32 is provided at the front end of the piston rod 33 to fit airtightly with the inner wall of the air cylinder 31. The rear end of the piston rod 33 is connected to the driving mechanism 4 so that the driving mechanism 4 drives the piston rod 33 to move backward and store energy; the energy storage spring 36 is sleeved on the piston rod 33, and its two ends respectively press against the position between the rear end face of the piston 32 and the rear end wall of the air cylinder 31.

[0076] The driving mechanism 4 includes a driving motor 41, a driving gear 43, a driving box 44, a lifting motor 45, a threaded rod 46, and a starting button 47. The driving motor 41 and the driving gear 43 are installed in the driving box 44. The driving box 44 can be movably installed on the driving seat 15 of the gun body 1. The lifting motor 45 is fixedly installed in the motor seat 17 of the gun body 1. The lower end of the threaded rod 46 is fixedly connected to the rotating shaft of the lifting motor 45, and the lower end is screwed into the threaded hole 48 opened on the driving box 44. The starting button 47 is arranged on the handle 14 outside the gun body 1, which is convenient for pressing with the thumb or middle finger. After the starting button 47 is pressed, the lifting motor 45 drives the threaded rod 46 to rotate, and the threaded rod 46 then drives the driving box 44 to move downward. When the driving box 44 moves down to the lower limit position, the lifting motor 45 stops rotating and the driving motor 41 drives the driving gear 43 to rotate. When the driving motor 41 stops rotating, the lifting motor 45 starts reversing and drives the driving box 44 to move up to the upper limit position.

[0077] The firing mechanism 5 includes a trigger 51, a pawl plate 53, a pawl 52, a torsion spring 56, a push plate 57, and a reset spring 7. The lower surface of the rod body of the piston rod 33 is provided with a ratchet 35 that meshes with the pawl 52. The pawl 52 is connected to the pawl plate 53 for unidirectional rotation through a pin. The torsion spring 56 is sleeved on the pin so that the pawl 52 can automatically reset after unidirectional rotation. A placement position 18 is provided in the gun body 1, and a first connecting position 19 is provided at the placement position 18. The pawl plate 53 is placed on the placement position 18, and a second connecting position 54 is provided on the pawl plate 53. The two ends of the tension spring 59 are respectively connected to the first connecting position 19 and the second connecting position 54 to realize that the pawl plate 53 can be elastically moved up and down in the placement position 18. The push plate 57 cooperates with the trigger 51 to move the push plate 57 backward when the trigger 51 is pressed. The upper part of the push plate 57 extends into the placement position 18 and is located below the pawl plate 53. The bottom of the pawl plate 53 is provided with a wedge block 55 protruding downward to abut against the push plate 57. The upper part of the push plate 57 is correspondingly provided with a wedge-shaped recess 58 that cooperates with the wedge block 55; the reset spring 7 is arranged in the handle of the gun body 1, one end of which abuts the rear surface of the push plate 57, and the other end abuts against the wall of the handle near the rear end. The reset spring 7 can drive the push plate 57 and the trigger 51 to reset forward at the same time after releasing the trigger 51, thereby moving the pawl plate 53 upward again to the initial state where the pawl 52 can engage with the ratchet teeth 35.

[0078] The adjustment mechanism 6 includes an adjustment knob 61 and a control circuit 62. The adjustment knob 61 is arranged on the outside of the gun body 1, so that the fingers of the hand holding the bone wax smear gun in the surgical hospital can reach it for adjustment. The adjustment knob 61 is electrically connected to the control circuit 62, and the drive motor 41 is electrically connected to the control circuit 62. The control circuit 62 controls the starting time of the drive motor 41 according to the adjustment position of the adjustment knob 61.

[0079] The operation of the bone wax smear gun with adjustable strength of this embodiment is as follows:

[0080] First, according to the location of the bleeding point on the bone surface during surgery, select a suitable gun head 2, connect it to the gun body 1, and fill the bone wax into the front end cavity of the gun head 2. At this time, all the mechanisms in the gun body 1 are in the initial state, as shown in the figure. Figure 7 As shown;

[0081] Secondly, according to the environmental conditions around the bone surface, use your fingers to turn the adjustment knob 61 to set the required bone wax ejection force;

[0082] Next, hold the bone wax smear gun in one hand, insert the gun head 2 into the body of the surgical patient, and make the front end opening of the gun head 2 close to and aim at the bone surface that needs to be smeared with bone wax;

[0083] Then, press the start button 47 with your finger, and the lifting motor 45 starts to rotate forward, driving the drive box 44 to move downward as a whole until it moves to the lower limit position, that is, when the drive gear 43 is just engaged with the rack 34 on the piston rod 33, the lifting motor 45 stops rotating, and at the same time the control circuit 62 controls the drive motor 41 to start working, and the drive motor 41 drives the drive gear 43 to rotate, so that the piston rod 33 starts to move backward, and the piston rod 33 starts to compress the energy storage spring 36 to store energy, as shown in FIG. Figure 8 As shown; when the working time of the drive motor 41 is the same as the time signal obtained by the control circuit 62, the control circuit 62 controls the drive motor 41 to stop working, and at the same time the lifting motor 45 is started again, and reverses to drive the drive box 44 to move up to the upper limit position, so that the drive gear 43 is disengaged from the rack 34; at this time, the piston rod 33 is locked in the energy storage position because the pawl 52 is engaged with the ratchet 35, and is in a state ready for ejection, as shown in FIG. Figure 9 shown.

[0084] Finally, the surgeon depresses the trigger 51, which moves backwards and drives the push plate 57 to move backwards. The return spring 7 is compressed and stores energy, and the push plate 57 moves backwards so that the wedge-shaped recess 58 moves to just below the wedge block 55. The tension spring 59 pulls the wedge block 55 downwards into the wedge-shaped recess 58, and the pawl plate 53 also moves downwards synchronously. Therefore, at this time, the pawl 52 is disengaged from the ratchet 35. Figure 10 As shown; the piston rod 33 is rapidly ejected forward under the elastic force of the energy storage spring 36, squeezing the gas in the air cylinder 31 in front of the piston 32 into the inner cavity of the gun head 2, and ejecting the bone wax at the front end inner cavity of the gun head 2 through the air pressure, so as to achieve smearing of the bone surface at the bleeding point, without the need for the surgeon to manually perform the bone wax smearing operation, and the operation is convenient and efficient.

[0085] The bone wax smearing gun of the present invention is provided with an adjustment mechanism 6, which can adjust and control the backward movement distance of the ejection part of the ejection mechanism 3 through the adjustment mechanism 6, so that the force of the bone wax ejected from the gun head 2 can be controlled. Therefore, in different bone surface surrounding environments, the surgeon can independently adjust the force of the bone wax ejection according to the environmental conditions, ensuring that each time the bone wax is ejected, it can be stably applied to the bone surface without falling, achieving an effective hemostatic effect, thereby improving efficiency and reducing operation time.

[0086] Throughout this specification, reference to terms such as "embodiment" or "example" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0087] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A bone wax smear gun with adjustable strength, comprising a gun body and a gun head, wherein the gun head is connected to the front end of the gun barrel of the gun body, and bone wax is filled in the inner cavity of the gun head near the front end, characterized in that: Also includes: An ejection mechanism is disposed in the gun barrel and includes an ejection member. When the ejection member moves backward, the ejection mechanism stores energy, and when the ejection member moves forward, the bone wax is ejected from the gun head. A drive mechanism is disposed within the gun barrel and is used to drive the ejection member to move backward to store energy; the drive mechanism includes a drive motor and a drive gear, wherein a rotating shaft gear of the drive motor meshes with the drive gear; a rack is provided on the ejection member, wherein the rack meshes with the drive gear, and when the drive motor is started, the ejection member moves backward; a firing mechanism, the firing mechanism being used to lock or release the energy storage state of the ejection member. When the trigger of the firing mechanism is pulled, the energy storage state of the ejection mechanism is released, and the ejection member moves forward to eject the bone wax from the gun head; An adjusting mechanism is provided in the gun body, and is used to adjust the backward movement distance of the ejection member to change the force with which the bone wax is ejected from the gun head; the adjusting mechanism includes an adjusting knob and a control circuit, the adjusting knob is provided outside the gun body, the adjusting knob is electrically connected to the control circuit, the drive motor is electrically connected to the control circuit, and the control circuit controls the starting duration of the drive motor according to the adjustment position of the adjusting knob.

2. The bone wax smear gun with adjustable strength according to claim 1, characterized in that: The ejection mechanism also includes an air cylinder and an energy storage spring. The ejection part corresponds to a piston rod. The front end of the piston rod is provided with a piston to fit airtightly with the inner wall of the air cylinder. The rear end of the piston rod is connected to the driving mechanism so that the driving mechanism drives the piston rod to move backward to store energy; the energy storage spring is sleeved on the piston rod, and the two ends of the energy storage spring respectively press against the position between the rear end face of the piston and the rear end face wall of the air cylinder.

3. The bone wax smear gun with adjustable strength according to claim 1, characterized in that: The driving mechanism further includes a driving box, a lifting motor and a threaded rod, wherein the driving motor and the driving gear are installed in the driving box, the driving box is installed in the gun body so as to be movable up and down, the lifting motor is fixedly installed in the gun body, one end of the threaded rod is connected to the rotating shaft of the lifting motor, and the other end of the threaded rod is screwed into the threaded hole provided on the driving box, and when the lifting motor is started, the threaded rod is driven to rotate, and the threaded rod further drives the driving box to move up and down; When the drive box moves downward to a set lower limit position, the drive gear is engaged with the rack; when the drive box moves upward to a set upper limit position, the drive gear is disengaged from the rack.

4. The bone wax smear gun with adjustable strength according to claim 3, characterized in that: The driving mechanism also includes a start button, which is arranged on the handle outside the gun body. After the start button is pressed, the lifting motor drives the drive box to move downward. When the drive box moves downward to the lower limit position, the lifting motor stops rotating and the drive motor drives the drive gear to rotate. When the drive motor stops rotating, the lifting motor starts to reverse and drives the drive box to move upward to the upper limit position.

5. The bone wax smear gun with adjustable strength according to claim 1, characterized in that: The launching mechanism includes the trigger and a pawl structure. The ejection member is correspondingly provided with a ratchet. After the ejection member moves backward to a set position, the pawl structure engages with the ratchet to fix the ejection member at the set position. When the trigger is pulled, the pawl structure is driven to disengage from the ratchet, and the ejection member is released from the stored energy state and ejected forward.

6. The bone wax smear gun with adjustable strength according to claim 5, characterized in that: The pawl structure includes a pawl plate, a pawl and a torsion spring. The pawl is connected to the pawl plate in a unidirectional manner through a pin shaft. The torsion spring is mounted on the pin shaft so that the pawl can automatically reset after rotation. When the ejection member moves backward, the ratchet moves backward and pushes the pawl to rotate and avoid. When the ejection member moves backward to the set position, the pawl is reset under the action of the torsion spring and engages with the ratchet tooth opposite to it.

7. The bone wax smear gun with adjustable strength according to claim 6, characterized in that: A placement position is provided in the gun body, a first connection position is provided at the placement position, the pawl disk is placed on the placement position, a second connection position is provided on the pawl disk, and the two ends of the tension spring are respectively connected to the first connection position and the second connection position to enable the pawl disk to elastically move up and down in the placement position.

8. The bone wax smear gun with adjustable strength according to claim 7, characterized in that: The firing mechanism further includes a push plate, which cooperates with the trigger to drive the push plate to move backward when the trigger is pulled, the upper portion of the push plate extending into the placement position and positioned below the pawl plate, the bottom of the pawl plate protruding downwardly with a wedge-shaped block abutting against the push plate, and the upper portion of the push plate correspondingly having a wedge-shaped recess cooperating with the wedge-shaped block; When the trigger is not pulled, the wedge-shaped recess of the push plate is separated from the wedge block, the pawl plate is pushed upward, the tension spring is stretched, and the pawl cooperates with the ratchet; when the trigger is pulled, the push plate moves backward to move the wedge-shaped recess below the wedge block, the tension spring pulls the wedge block downward into the wedge-shaped recess, and the pawl plate moves downward at the same time, at which time the pawl disengages from the ratchet.

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