Desk-type bar breaker

Abstract

The application provides a bench-type rod breaking device, which comprises a fixed base, a rod breaking cutter body and a rod breaking driving shaft. The fixed base is provided with a driving tooth groove and a stop tooth groove. The rod breaking cutter body comprises a cutter body and a stop pawl. The cutter body is rotationally connected with the fixed base. The cutter body is provided with the stop pawl and a long sliding groove. The stop pawl is matched with the stop tooth groove. One end of the long sliding groove is close to the driving tooth groove, and the other end is away from the driving tooth groove. The rod breaking driving shaft comprises a driving shaft body and a guide device. The end of the driving shaft body is provided with a driving gear. The driving gear is matched with the driving tooth groove. The guide device is arranged on the end of the driving shaft body provided with the driving gear. The guide device can move along the extension direction of the long sliding groove, so that the driving gear is engaged with or separated from the driving tooth groove. The application can make the rod breaking operation more labor-saving, greatly shorten the rod breaking stroke, shorten the included angle between the rod breaking driving shaft and the rod breaking cutter body, and reduce the overall volume of the bench-type rod breaking device.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a desktop rod breaker. Background Technology

[0002] In current orthopedic surgeries, connecting rods are used to fix multiple implanted pedicle screws into a single unit. The connecting rods are adjusted to the appropriate length according to the actual needs of the surgery.

[0003] In related technologies, a connecting rod is broken using a rod breaking device. The rod breaking device includes a base, a rod breaking housing, and a rod breaking mechanism. Both the rod breaking housing and the rod breaking mechanism are mounted on the base. The rod breaking mechanism includes a rod breaking body, a rod breaking base, a reset spring, and a rod breaking drive shaft. The rod breaking drive shaft is mounted on the rod breaking housing. The rod breaking process is as follows: The entire rod breaking device is placed directly on the operating table. According to the outer diameter of the connecting rod, one end of the connecting rod is inserted into the connecting rod insertion hole on the rod breaking base and the rod breaking body. When the rod breaking drive shaft rotates, one end of the rod breaking body rotates relative to the rod breaking base, while the inner end of the rod breaking drive shaft abuts against the other end of the rod breaking body. The other end of the reset spring is in a downward pressing state, continuously driving the rod breaking drive shaft to rotate until the portion of the connecting rod located in the connecting rod insertion hole of the rod breaking body separates from the portion of the connecting rod located in the connecting rod insertion hole of the rod breaking base, thus completing the rod breaking.

[0004] The above-mentioned rod breaking device has the following defects: First, the rod breaking drive shaft is located at the top of the rod breaking shell and is arranged vertically on the rod breaking shell, resulting in a large rod breaking mechanism and very limited operating space in the sterile area, making rod breaking operation very inconvenient; Second, after rotating the rod breaking drive shaft, the inner end of the rod breaking drive shaft is pressed down by rotating and pressing down, so that the reset spring is in a pressed state. During the rod breaking process of the relatively thick outer diameter connecting rod, it is necessary to increase the rotational force of the rod breaking drive shaft, making it very difficult to break the rod. Summary of the Invention

[0005] This invention provides a desktop rod breaker to solve the shortcomings of existing rod breaking devices, which are large in size and require a lot of effort to break rods.

[0006] This invention provides a benchtop rod breaker, comprising: a fixed base, a rod breaker body, and a rod breaker drive shaft; the fixed base is provided with a drive tooth groove and a stop tooth groove; the rod breaker body includes a blade body and a stop pawl, the blade body is rotatably connected to the fixed base, the blade body is provided with the stop pawl and a long sliding groove, the stop pawl engages with the stop tooth groove, one end of the long sliding groove is close to the drive tooth groove, and the other end is away from the drive tooth groove, the rod breaker body and the fixed base have multiple sets of corresponding connecting rod insertion holes with different diameters; the rod breaker drive shaft includes a drive shaft body and a guide device, the end of the drive shaft body is provided with a drive gear, the drive gear is adapted to the drive tooth groove, the guide device is provided at the end of the drive shaft body where the drive gear is provided, the other end of the drive shaft body can approach or move away from the fixed base, the guide device is movably connected to the long sliding groove, and the guide device can move along the extension direction of the long sliding groove to make the drive gear engage or disengage from the drive tooth groove.

[0007] According to the present invention, a benchtop bar breaker is provided, wherein the end of the blade body is movably connected to a stop pawl; the bar breaker blade body further includes a pawl reset assembly: the pawl reset assembly is connected to the blade body and the stop pawl respectively; when the stop pawl moves downward along the extension direction of the stop tooth groove to disengage from the stop tooth groove, the stop pawl is reset by the action of the pawl reset assembly.

[0008] According to a benchtop bar breaker provided by the present invention, the pawl reset assembly includes: a reset spring and a spring fixing post; the spring fixing post is connected to one end of the blade body near the stop tooth groove, the reset spring is sleeved on the spring fixing post, and the two ends of the reset spring are respectively fixedly connected to the blade body and the stop pawl.

[0009] According to a benchtop rod breaker provided by the present invention, two pawl reset assemblies are provided, and the two pawl reset assemblies are arranged opposite to each other; one end of each of the two reset springs is respectively attached to both sides of the center line of the stop pawl.

[0010] According to a benchtop bar breaker provided by the present invention, a first mounting tongue and a second mounting tongue are provided at one end of the blade body near the stop groove. The first mounting tongue and the second mounting tongue are arranged opposite to each other and together define an installation space. A spring fixing post passes through at least one of the first mounting tongue and the second mounting tongue and is connected to the other of the first mounting tongue and the second mounting tongue. A reset spring is disposed in the installation space. A stop pawl is movably connected to the first mounting tongue and / or the second mounting tongue.

[0011] According to a benchtop rod breaker provided by the present invention, the pawl reset assembly further includes a limiting member disposed on the outer side of the end where the reset spring is connected to the stop pawl.

[0012] According to the present invention, a benchtop rod breaker includes a drive shaft body comprising a drive portion and a connecting portion; the drive portion and the connecting portion are connected and form an angle, the opening direction of the angle facing the fixed base; one end of the drive portion is provided with the guide device and the drive gear, and the other end is connected to one end of the connecting portion; the other end of the connecting portion extends in a direction away from the drive portion and can be close to or away from the fixed base.

[0013] According to a benchtop bar breaker provided by the present invention, a positioning block is provided at one end of the fixed base rotatably connected to the blade body, and the positioning block protrudes from the fixed base; a limiting part is provided at one end of the blade body rotatably connected to the fixed base, and the limiting part protrudes from the blade body, and the limiting part can contact or separate from the positioning block; when the limiting part contacts the positioning block, the connecting rod insertion hole of the bar breaker blade corresponds to the connecting rod insertion hole of the fixed base.

[0014] According to the present invention, a benchtop bar breaker further includes a reset spring; the two ends of the reset spring are respectively connected to the fixed base and the bar breaker body.

[0015] According to the present invention, a benchtop rod breaker further includes a base, the base comprising: a first support portion, a second support portion, and a support platform; the support platform is connected to the second end of the fixed base near the rod breaker drive shaft; the first support portion and the second support portion are respectively rotatably connected to the side of the support platform away from the fixed base, and the first support portion and the second support portion are movably connected.

[0016] The tabletop rod breaker provided by this invention features a fixed base with a drive tooth groove and a stop tooth groove. The rod breaker body is equipped with a stop pawl that engages with the stop tooth groove. The rod breaker drive shaft is equipped with a drive gear that engages with the drive tooth groove. The rod breaker drive shaft is movably connected to the long slide groove of the rod breaker body via a guide device. After the connecting rod is inserted into the connecting rod insertion hole, the rod breaker drive shaft is pressed down to make the drive gear mesh with the drive tooth groove, thus pushing the rod breaker body to move and achieving the first rod break. The rod breaker drive shaft is then lifted, and at this time, the rod breaker drive shaft slides along the long slide groove away from the drive tooth groove. The drive gear of this rod breaker drive shaft separates from the drive tooth groove. Since the rod breaker body cannot reverse its stroke due to the action of the stop pawl, the rod breaker drive shaft is pressed down again to continue pushing the rod breaker body to move until the rod break is completed. The above-mentioned method of breaking the bar by pressing down the bar-breaking drive shaft twice or more can make the bar-breaking operation more labor-saving and greatly shorten the bar-breaking stroke, thereby shortening the included angle between the bar-breaking drive shaft and the bar-breaking cutter body and reducing the overall size of the benchtop bar-breaking device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an axial view of a benchtop bar breaker provided in some embodiments of the present invention;

[0019] Figure 2 This is one of the structural schematic diagrams of the benchtop rod breaker provided in some embodiments of the present invention;

[0020] Figure 3 This is a second schematic diagram of the structure of the benchtop rod breaker provided in some embodiments of the present invention;

[0021] Figure 4 This is one of the partial structural schematic diagrams of the benchtop rod breaker provided in some embodiments of the present invention;

[0022] Figure 5 This is a partial structural schematic diagram of the fixing base provided in some embodiments of the present invention;

[0023] Figure 6 This is a partial structural schematic diagram of the broken rod drive shaft provided in some embodiments of the present invention;

[0024] Figure 7 This is a partial structural schematic diagram of the bar-breaking tool body provided in some embodiments of the present invention;

[0025] Figure 8This is a schematic diagram of the pawl reset assembly and stop pawl provided in some embodiments of the present invention;

[0026] Figure 9 This is a second partial structural schematic diagram of the benchtop rod breaker provided in some embodiments of the present invention;

[0027] Figure 10 This is a schematic diagram of the structure of the base provided in some embodiments of the present invention.

[0028] Figure label:

[0029] 110: Fixed base; 111: Drive tooth groove; 112: Stop tooth groove; 113: Positioning block;

[0030] 120: Broken bar blade body; 121: Blade body body; 1211: Limiting part; 1212: First mounting tongue; 1213: Second mounting tongue; 1214: Long slide groove; 122: Stop pawl; 123: Return spring; 124: Spring fixing post; 125: Limiting component;

[0031] 130: Broken rod drive shaft; 131: Drive shaft body; 1311: Drive unit; 1312: Connecting part; 1313: Drive gear; 132: Guide device;

[0032] 140: Reset spring; 150: Base; 151: First support part; 152: Second support part; 153: Support platform; 154: Fixing rod;

[0033] 160: Connecting rod insertion hole; 170: Weight reduction hole. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] The following is combined Figures 1-10 The tabletop rod breaker of the present invention is described.

[0036] The desktop rod cutter provided by this invention can be applied in the medical field to cut connecting rods, for example, in conjunction with posterior spinal rod and screw surgery, to cut the rods and screws.

[0037] like Figure 1 As shown, the benchtop bar breaker of the present invention includes: a fixed base 110, a bar breaker body 120, and a bar breaker drive shaft 130.

[0038] The fixed base 110 is provided with a drive tooth groove 111 and a stop tooth groove 112; the bar breaking cutter body 120 includes a cutter body 121 and a stop pawl 122. The cutter body 121 is rotatably connected to the fixed base 110. The cutter body 121 is provided with a stop pawl 122 and a long sliding groove 1214. The stop pawl 122 cooperates with the stop tooth groove 112. One end of the long sliding groove 1214 is close to the drive tooth groove 111, and the other end is away from the drive tooth groove 111. The bar breaking cutter body 120 and the fixed base 110 have multiple sets of corresponding connecting rod insertion holes 160 with different diameters; the bar breaking drive shaft 1 30 includes a drive shaft body 131 and a guide device 132. A drive gear 1313 is provided at one end of the drive shaft body 131. The drive gear 1313 is adapted to the drive tooth groove 111. The guide device 132 is provided at one end of the drive shaft body 131 where the drive gear 1313 is provided. The other end of the drive shaft body 131 can be close to or away from the fixed base 110. The guide device 132 is movably connected to the long slide groove 1214. The guide device 132 can move along the extension direction of the long slide groove 1214 so that the drive gear 1313 meshes with or separates from the drive tooth groove 111.

[0039] The benchtop rod breaker provided by this invention features a fixed base 110 with a drive tooth groove 111 and a stop tooth groove 112. The rod breaker body 120 is equipped with a stop pawl 122 that engages with the stop tooth groove 112. The rod breaker drive shaft 130 is equipped with a drive gear 1313 that engages with the drive tooth groove 111. The rod breaker drive shaft 130 is movably connected to the long sliding groove 1214 of the rod breaker body 120 via a guide device 132. After inserting the connecting rod into the connecting rod insertion hole 160, pressing down the rod breaker drive shaft 130 causes the drive gear 1313 to engage with the stop tooth groove 112. 3. Engaging with the drive gear 111, the bar-breaking cutter 120 is moved, thus achieving the first-stage bar breaking of the connecting rod. The bar-breaking drive shaft 130 is then lifted. At this time, the bar-breaking drive shaft 130 slides along the long slide groove 1214 away from the drive gear 111. The drive gear 1313 of the bar-breaking drive shaft 130 separates from the drive gear 111. Since the bar-breaking cutter 120 cannot reverse its stroke due to the action of the stop pawl 122, the bar-breaking drive shaft 130 is pressed down again, continuing to push the bar-breaking cutter 120 to move until the bar breaking is completed. In this way, the bar breaking is achieved by pressing down the bar-breaking drive shaft 130 two or more times, making the bar-breaking operation more labor-saving and greatly shortening the bar-breaking stroke, thereby shortening the angle between the bar-breaking drive shaft 130 and the bar-breaking cutter 120 and reducing the overall size of the benchtop bar-breaking device.

[0040] The bar cutter body 120 and the fixed base 110 have multiple sets of corresponding connecting rod insertion holes 160 with different diameters. The multiple sets of connecting rod insertion holes 160 with different diameters are used to insert connecting rods of different diameters. The benchtop bar cutter is used to cut the connecting rods.

[0041] The multiple connecting rod sockets 160 have multiple hole diameters, such as 3 to 7 mm, for example 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, etc., to accommodate broken connecting rods of various diameters.

[0042] Among them, such as Figure 4 As shown, the long groove 1214 is used to limit the movement path of the guide device 132, thereby limiting the movement length of the broken rod drive shaft 130.

[0043] Furthermore, the corresponding ends of the blade body 121 and the fixed base 110 are rotatably connected. The other end of the blade body 121 and the fixed base 110 is provided with a driving structure and a stop structure. Multiple connecting rod insertion holes 160 are provided at the end where the blade body 121 and the fixed base 110 are connected to increase the rod breaking torque and reduce the force required when breaking the rod.

[0044] Specifically, such as Figure 4 and Figure 5 As shown, one end of the fixed base 110 is provided with a drive tooth groove 111 and a stop tooth groove 112. The other end of the fixed base 110 is rotatably connected to one end of the broken bar cutter body 120. The other end of the broken bar cutter body 120 is provided with a stop pawl 122 and a long slide groove 1214.

[0045] In some embodiments, such as Figure 2 and Figure 3 As shown, through holes are provided at the corresponding ends of the blade body 121 and the fixed base 110. The pin passes through the through holes of the blade body 121 and the fixed base 110 in sequence to connect the blade body 121 and the fixed base 110.

[0046] The blade body 121 and the fixed base 110 are provided with multiple weight-reducing holes 170 to reduce the overall weight of the device and improve its portability.

[0047] In some embodiments, the fixed base 110 includes a first fixing part and a second fixing part. The first fixing part is connected to the base 150 and is arranged along the length direction of the bar breaking cutter body 120. The length of the first fixing part can be set according to the specific application scenario to increase the bar breaking torque and reduce the bar breaking force. The second fixing part is connected to the first fixing part and is arranged along the height direction of the bar breaking cutter body 120. The height of the second fixing part can be set according to the specific application scenario to increase the bar breaking stroke of the bar breaking drive shaft 130.

[0048] The first and second fixing parts can be detachable rotating connections such as threads or pins, which facilitate disassembly and storage and increase the portability of the device.

[0049] In some embodiments, such as Figures 1 to 3As shown, multiple connecting rod insertion holes 160 are distributed around the rotating pin shaft of the broken rod body 120.

[0050] In some embodiments, the guide device 132 is disposed at the center of the drive gear 1313, and the drive gear 1313 rotates around the guide device 132 to achieve stable meshing of the drive gear 1313 with the drive tooth groove 111.

[0051] The drive tooth groove 111 and the stop tooth groove 112 extend along the height direction of the fixed base 110 so that when the user presses down the rod breaking drive shaft 130, the drive gear 1313 rotates around the guide device 132. During the process of the drive gear 1313 meshing with the drive tooth groove 111, the included angle between the rod breaking blade 120 and the fixed base 110 becomes smaller, so as to break the connecting rod.

[0052] During use, the user can move the broken rod drive shaft 130 up and down to make the guide device 132 slide along the long slide groove 1214, thereby making the drive gear 1313 mesh with or separate from the drive tooth groove 111.

[0053] When the guide device 132 is located at one end of the long slide 1214 near the drive tooth groove 111, the drive gear 1313 meshes with the drive tooth groove 111; when the guide device 132 is located at the other end of the long slide 1214 away from the drive tooth groove 111, the drive gear 1313 separates from the drive tooth groove 111.

[0054] When the drive gear 1313 is engaged with the drive tooth groove 111 and the other end of the broken bar drive shaft 130 is close to the fixed base 110, the stop pawl 122 moves downward along the extension direction of the stop tooth groove 112; when the drive gear 1313 is separated from the drive tooth groove 111 and the other end of the broken bar drive shaft 130 is far away from the fixed base 110, the position of the stop pawl 122 remains unchanged.

[0055] The blade body 121 is rotatably connected to the fixed base 110, and the connection method can be a pin connection or a screw connection.

[0056] The guide device 132 is connected to the drive shaft body 131, and the connection method can be threaded connection, snap-fit ​​connection or integral molding connection, etc.

[0057] In some embodiments, the two ends of the long slide 1214 are arc-shaped, conforming to the guide device 132, and the pin can rotate and move within the long slide 1214.

[0058] For example, such as Figure 6As shown, the guide device 132 is a pin, the tail of which is fixedly threaded to the drive shaft body 131, and the end of the pin is engaged in the long slide groove 1214. The guide device 132 can move along the extension direction of the long slide groove 1214.

[0059] Alternatively, the guide device 132 and the drive shaft body 131 are integrally formed. The guide device 132 protrudes from the drive shaft body 131 and is a cylindrical boss. Both ends of the long slide groove 1214 are arc grooves that conform to the shape of the cylindrical boss. The width of the middle part of the long slide groove 1214 is not less than the diameter of the guide device 132, so that the guide device 132 can slide along the length of the long slide groove 1214 and can rotate at both ends of the long slide groove 1214.

[0060] In some embodiments, the guide device 132 is rotatably connected to the drive shaft body 131, and the two ends of the long slide groove 1214 are non-circular and conform to the shape of the guide device 132.

[0061] When the guide device 132 is located at both ends of the long slide 1214, the guide device 132 is engaged with the long slide 1214 and the guide device 132 and the long slide 1214 remain stationary. At this time, pressing down or lifting the broken bar drive shaft 130 can make the broken bar drive shaft 130 rotate around the guide device 132.

[0062] In some embodiments, the extension direction of the long slide groove 1214 forms an angle with the extension direction of the cutter body 121, so as to increase the extension length of the long slide groove 1214 within a limited space, so as to realize the complete meshing or separation of the drive gear 1313 and the drive tooth groove 111, thereby reducing the overall size of the machine.

[0063] Furthermore, such as Figure 2 As shown, the drive shaft body 131 includes a drive part 1311 and a connecting part 1312; the drive part 1311 and the connecting part 1312 are connected and form an angle, with the opening direction of the angle facing the fixed base 110; one end of the drive part 1311 is provided with a guide device 132 and a drive gear 1313, and the other end is connected to one end of the connecting part 1312; the other end of the connecting part 1312 extends in a direction away from the drive part 1311 and can approach or move away from the fixed base 110.

[0064] The drive part 1311 and the connecting part 1312 can be separate or integrally formed.

[0065] In some embodiments, the drive part 1311 and the connecting part 1312 are separate units, and the drive part 1311 and the connecting part 1312 can be detached by means of threaded connection, plug-in connection or other detachable connection methods, so as to be disassembled and stored.

[0066] The drive unit 1311 and the connecting unit 1312 form an angle to further shorten the rod breaking stroke of the rod breaking drive shaft 130 and reduce the overall height of the benchtop rod breaking device.

[0067] In some embodiments, the included angle formed by the driving part 1311 and the connecting part 1312 is an obtuse angle, so as to ensure the length of the broken rod stroke at the other end of the driving part 1311 and avoid the other end of the driving part 1311 being blocked from pressing down, which would affect the broken rod.

[0068] In some embodiments, the connecting part 1312 can be a rod, one end of which is connected to the driving part 1311, and the other end of which is provided with a handle. The handle can be connected to the other end of the rod by means of insertion, threading, or other methods.

[0069] The handle can be designed to fit the shape of your hand to increase comfort during use.

[0070] In some embodiments, the outer layer of the handle is a flexible layer, such as a sponge layer or a rubber layer, to further increase comfort during use and to provide anti-slip properties.

[0071] In some embodiments, such as Figure 4 and Figure 7 As shown, the end of the blade body 121 is movably connected to the stop pawl 122; the broken bar blade body 120 also includes: a pawl reset assembly: the pawl reset assembly is connected to the blade body 121 and the stop pawl 122 respectively; when the stop pawl 122 moves downward along the extension direction of the stop tooth groove 112 to disengage from the stop tooth groove 112, the stop pawl 122 is reset under the action of the pawl reset assembly.

[0072] In this embodiment, by setting a pawl reset assembly, when the stop pawl 122 is disengaged from the stop tooth groove 112, the stop pawl 122 can be reset under the elastic action of the pawl reset assembly. At this time, the broken bar body 120 is lifted, so that the drive gear 1313 is separated from the drive tooth groove 111, thereby smoothly resetting the broken bar body 120 to the state corresponding to the multiple sets of connecting rod insertion holes 160.

[0073] In some embodiments, such as Figure 5 As shown, the extension length of the stop groove 112 is less than the extension length of the drive groove 111, so that after the stop pawl 122 is reset, lifting the broken bar drive shaft 130 can directly reset the broken bar cutter body 120, improving the ease of use.

[0074] Furthermore, such as Figure 8As shown, the pawl reset assembly includes a reset spring 123 and a spring fixing post 124; the spring fixing post 124 is connected to one end of the cutter body 121 near the stop tooth groove 112, the reset spring 123 is sleeved on the spring fixing post 124, and the two ends of the reset spring 123 are fixedly connected to the cutter body 121 and the stop pawl 122 respectively.

[0075] The two ends of the return spring 123 can be fixedly connected to the blade body 121 and the stop pawl 122 respectively by means of plug-in connection, adhesive, snap-fit, etc.

[0076] The pawl reset assembly is similar to the reset spring 123 used in spring hinges in related technologies. The reset spring 123 has an elastic part and two legs connected to the elastic part. The ends of the two legs are connected to two parts respectively. When the two parts are subjected to external force and move closer or further apart, the elastic part is compressed or stretched. When the external force is removed, the elastic part resets.

[0077] In some embodiments, a first stop block is provided at one end of the cutter body 121 near the stop pawl 122; the stop pawl 122 is provided with a second stop block; and the two ends of the return spring 123 are respectively connected to the first stop block and the second stop block.

[0078] The first stop block and the second stop block can be fixed slots, and the two ends of the return spring 123 are fixedly connected to the cutter body 121 and the stop pawl 122 by inserting into the fixed slots.

[0079] Alternatively, the first stop block and the second stop block can be bosses, and the two ends of the return spring 123 are fixedly connected to the opposite surfaces of the first stop block and the second stop block, respectively.

[0080] Furthermore, there are two pawl reset assemblies, which are arranged opposite to each other; one end of each of the two reset springs 123 is respectively attached to both sides of the center line of the stop pawl 122.

[0081] Two return springs 123 are positioned opposite each other on both sides of the centerline of the stop pawl 122. When the stop pawl 122 is in its initial state, the two return springs 123 exert equal forces on the stop pawl 122. When the stop pawl 122 is swung by an external force, one of the two return springs 123 is compressed and the other is extended. When the external force on the stop pawl 122 is removed, the stop pawl 122 is reset under the action of the two return springs 123.

[0082] Furthermore, such as Figure 7As shown, the blade body 121 has a first mounting tongue 1212 and a second mounting tongue 1213 at one end near the stop groove 112. The first mounting tongue 1212 and the second mounting tongue 1213 are arranged opposite to each other and together define the mounting space. The spring fixing post 124 passes through at least one of the first mounting tongue 1212 and the second mounting tongue 1213 and is connected to the other of the first mounting tongue 1212 and the second mounting tongue 1213. The return spring 123 is disposed in the mounting space. The stop pawl 122 is movably connected to the first mounting tongue 1212 and / or the second mounting tongue 1213.

[0083] The first mounting tongue 1212 and the second mounting tongue 1213 are disposed on both sides of the reset spring 123, which can limit the movement path of the reset spring 123 to prevent the reset spring 123 from sliding out along the extension direction of the spring fixing post 124.

[0084] The spring fixing post 124 can pass through the first mounting tongue 1212 and abut against the second mounting tongue 1213, or it can pass through the first mounting tongue 1212 and the second mounting tongue 1213, or it can pass through the first mounting tongue 1212 and part of the second mounting tongue 1213.

[0085] The spring fixing post 124 can be a pin, bolt, or other device with a shaft structure.

[0086] The bottom end of the stop pawl 122 is movably connected to the first mounting tongue 1212 and / or the second mounting tongue 1213, and the top end of the stop pawl 122 is selectively connected to the stop tooth groove 112.

[0087] In some embodiments, the bottom of the stop pawl 122 is a circular structure, and the first mounting tongue 1212 and / or the second mounting tongue 1213 are provided with a contour groove of the circular structure at one end facing the stop pawl 122. The bottom of the stop pawl 122 is engaged in the contour groove and can swing along the axial direction of the contour groove.

[0088] In some embodiments, the bottom end of the contour groove is a circular structure and the top end is a V-shaped structure, and the swing stroke of the stop pawl 122 is limited by the V-shaped structure.

[0089] In some embodiments, such as Figure 1 As shown, the drive unit 1311 is clamped on the outside of the first mounting tongue 1212 and the second mounting tongue 1213. The drive unit 1311 has a groove structure, and at least a portion of the first mounting tongue 1212 and the second mounting tongue 1213 are disposed in the groove. Symmetrical drive gears 1313 are provided at the ends of the two groove walls of the groove structure. The fixed base 110 is correspondingly provided with symmetrical drive tooth grooves 111. The two drive gears 1313 are adapted to the two drive tooth grooves 111 to increase the reliability of the structure and improve the meshing strength.

[0090] Furthermore, the pawl reset assembly also includes a limiting member 125, which is disposed on the outer side of the end where the reset spring 123 is connected to the stop pawl 122, to prevent the foot of the reset spring 123 from swinging too much during the reset process of the stop pawl 122 and disengaging from the stop pawl 122, thereby increasing the stability of the connection between the reset spring 123 and the stop pawl 122.

[0091] Among them, the limiting member 125 can be a boss structure.

[0092] Furthermore, such as Figure 9 As shown, a positioning block 113 is provided at one end of the fixed base 110 that is rotatably connected to the blade body 121, and the positioning block 113 protrudes from the fixed base 110; a limiting part 1211 is provided at one end of the blade body 121 that is rotatably connected to the fixed base 110, and the limiting part 1211 protrudes from the blade body 121, and the limiting part 1211 can contact or separate from the positioning block 113; when the limiting part 1211 contacts the positioning block 113, the broken bar blade 120 cannot continue to move, and at this time the connecting rod insertion hole 160 of the broken bar blade 120 corresponds to the connecting rod insertion hole 160 of the fixed base 110, so as to facilitate the insertion of the connecting rod.

[0093] The positioning block 113 can be integrally formed with the fixed base 110, or it can be connected by means of thread, plug-in, adhesive or other connection methods.

[0094] The positioning block 113 can be a boss structure, such as a cylindrical boss or a rectangular boss.

[0095] The limiting part 1211 and the positioning block 113 can be designed to make line contact to increase the accuracy of the correspondence between the connecting rod insertion hole 160 of the broken rod body 120 and the connecting rod insertion hole 160 of the fixed base 110; or, the limiting part 1211 and the positioning block 113 can be designed to make surface contact to protect the contact surface between the limiting part 1211 and the positioning block 113.

[0096] Furthermore, the benchtop bar breaker also includes a reset spring 140; the reset spring 140 is connected to the fixed base 110 and the bar breaker body 120 respectively, so as to reset the bar breaker body 120 when the stop pawl 122 disengages from the stop tooth groove 112 and the drive gear 1313 separates from the drive tooth groove 111.

[0097] Among them, the broken bar blade body 120 is reset to the limit part 1211 and contacts the positioning block 113 under the action of the reset spring 140.

[0098] In some embodiments, the reset spring 140 includes a first spring and a second spring, one end of the first spring and one end of the second spring are connected, and the other ends of the first spring and the other ends of the second spring are respectively connected to the fixed base 110 and the broken bar body 120 in a one-to-one correspondence.

[0099] In some embodiments, the reset spring 140 may be made of stainless steel, a material known in the art.

[0100] Furthermore, such as Figure 10 As shown, the benchtop rod breaker also includes a base 150, which includes a first support part 151, a second support part 152, and a support platform 153. The support platform 153 is connected to the second end of the fixed base 110 near the rod breaker drive shaft 130. The first support part 151 and the second support part 152 are rotatably connected to the side of the support platform 153 away from the fixed base 110, and the first support part 151 and the second support part 152 are movably connected.

[0101] The first support part 151 and the second support part 152 are movably connected so that the ends of the first support part 151 and the second support part 152 can be separated from each other or brought closer together. When the ends of the first support part 151 and the second support part 152 are separated from each other, the support stability of the base 150 can be increased. When the ends of the first support part 151 and the second support part 152 are brought closer together, the base 150 can be folded up, reducing the overall volume of the benchtop rod breaker.

[0102] In some embodiments, the ends of the first support portion 151 and the second support portion 152 are movably connected to the support platform 153, and the ends of the first support portion 151 and the second support portion 152 are movably connected. The other end of the first support portion 151 and the other end of the second support portion 152 can approach or separate from each other to increase the stability of the support.

[0103] Furthermore, the end of the first support portion 151 engages with the end of the second support portion 152, so that either the end of the first support portion 151 or the end of the second support portion 152 can be rotated to bring them closer together or separate them, thereby improving the ease of use.

[0104] In some embodiments, the base 150 further includes a fixing rod 154, one end of which is rotatably connected to one of the first support portion 151 and the second support portion 152, and the other end of which can be selectively connected to or separated from the other of the first support portion 151 and the second support portion 152 to further increase the reliability of the support.

[0105] For example, when one end of the fixing rod 154 is rotatably connected to the first support 151 and the other end of the fixing rod 154 is separated from the second support 152, the other end of the first support 151 and the other end of the second support 152 can move closer to each other or separate. When one end of the fixing rod 154 is rotatably connected to the first support 151 and the other end of the fixing rod 154 is connected to the second support 152, the other end of the first support 151 and the other end of the second support 152 cannot move, so as to provide a stable support function.

[0106] The other end of the fixing rod 154 can be provided with a snap-fit ​​groove, and the other of the first support part 151 and the second support part 152 is provided with a snap-fit ​​component. The other end of the fixing rod 154 can be snapped into the snap-fit ​​component through the snap-fit ​​groove.

[0107] One end of the fixing rod 154 can be rotatably connected to one of the first support part 151 and the second support part 152 via a pin, bolt, screw, or the like.

[0108] The benchtop rod cutter provided by this invention features a fixed base 110 with a drive tooth groove 111 and a stop tooth groove 112, a rod-cutting blade 120 with a stop pawl 122 that engages with the stop tooth groove 112, and a rod-cutting drive shaft 130 with a drive gear 1313 that engages with the drive tooth groove 111. The rod-cutting drive shaft 130 is movably connected to the long slide groove 1214 of the rod-cutting blade 120 via a guide device 132. After inserting the connecting rod into the connecting rod insertion hole 160, the rod can be cut by pressing down the rod-cutting drive shaft 130 twice or more. This achieves a more labor-saving rod-cutting operation and greatly shortens the rod-cutting stroke, thereby shortening the angle between the rod-cutting drive shaft 130 and the rod-cutting blade 120, reducing the overall size of the benchtop rod cutter, and making it convenient for carrying and disinfection.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A desktop rod breaker, characterized in that, include: The fixed base is equipped with a drive tooth groove and a stop tooth groove; The bar breaking cutter body includes a cutter body and a stop pawl. The cutter body is rotatably connected to the fixed base. The cutter body is provided with the stop pawl and a long sliding groove. The stop pawl cooperates with the stop tooth groove. One end of the long sliding groove is close to the drive tooth groove, and the other end is away from the drive tooth groove. The bar breaking cutter body and the fixed base have multiple sets of corresponding connecting rod insertion holes with different diameters. A broken rod drive shaft includes a drive shaft body and a guide device. A drive gear is provided at one end of the drive shaft body, and the drive gear is adapted to the drive tooth groove. The guide device is provided at one end of the drive shaft body where the drive gear is provided. The other end of the drive shaft body can be close to or away from the fixed base. The guide device is movably connected to the long slide groove. The guide device can move along the extension direction of the long slide groove so that the drive gear can mesh or disengage from the drive tooth groove.

2. The benchtop rod breaker according to claim 1, characterized in that, The end of the blade body is movably connected to the stop pawl; The broken bar cutter body further includes: a pawl reset assembly: the pawl reset assembly is connected to the cutter body body and the stop pawl respectively; When the stop pawl moves downward along the extension direction of the stop tooth groove until it disengages from the stop tooth groove, the stop pawl is reset by the action of the pawl reset assembly.

3. The benchtop rod breaker according to claim 2, characterized in that, The pawl reset assembly includes: a reset spring and a spring fixing post; The spring fixing post is connected to one end of the blade body near the stop tooth groove, the return spring is sleeved on the spring fixing post, and the two ends of the return spring are fixedly connected to the blade body and the stop pawl, respectively.

4. The benchtop rod breaker according to claim 3, characterized in that, Two ratchet reset components are provided, and the two ratchet reset components are arranged opposite to each other; One end of each of the two return springs is respectively attached to both sides of the centerline of the stop pawl.

5. The benchtop rod breaker according to claim 3, characterized in that, The blade body is provided with a first mounting tongue and a second mounting tongue at one end near the stop groove. The first mounting tongue and the second mounting tongue are arranged opposite to each other and together define the mounting space. The spring fixing post passes through at least one of the first mounting tongue and the second mounting tongue and is connected to the other of the first mounting tongue and the second mounting tongue. The reset spring is disposed in the mounting space; The stop pawl is movably connected to the first mounting tongue and / or the second mounting tongue.

6. The benchtop rod breaker according to claim 3, characterized in that, The pawl reset assembly also includes a limiting member, which is disposed on the outer side of the end where the reset spring connects to the stop pawl.

7. The benchtop rod breaker according to any one of claims 1 to 6, characterized in that, The drive shaft body includes: a drive section and a connecting section; The driving part and the connecting part are connected and form an angle, and the opening direction of the angle is towards the fixed base; One end of the drive unit is provided with the guide device and the drive gear, and the other end is connected to one end of the connecting unit; The other end of the connecting part extends in a direction away from the driving part and can be close to or away from the fixed base.

8. The benchtop rod breaker according to any one of claims 1 to 6, characterized in that, A positioning block is provided at one end of the fixed base that is rotatably connected to the blade body, and the positioning block protrudes from the fixed base. A limiting part is provided at one end of the blade body that is rotatably connected to the fixed base. The limiting part protrudes from the blade body and can contact or separate from the positioning block. When the limiting part is in contact with the positioning block, the connecting rod insertion hole of the broken rod body corresponds to the connecting rod insertion hole of the fixed base.

9. The benchtop rod breaker according to any one of claims 1 to 6, characterized in that, The desktop rod breaker also includes a reset spring; The two ends of the reset spring are connected to the fixed base and the broken bar body, respectively.

10. The benchtop rod breaker according to any one of claims 1 to 6, characterized in that, The desktop bar breaker also includes a base, which includes a first support part, a second support part, and a support platform. The support platform is connected to the second end of the fixed base near the drive shaft of the broken bar. The first support portion and the second support portion are rotatably connected to the side of the support platform away from the fixed base, and the first support portion and the second support portion are movably connected.

Images