Bent mouth gag

Abstract

The utility model discloses a bent mouth gag which comprises a catheter and a handle core tube, one end of the catheter is a bent part, the other end of the catheter is coaxially and fixedly connected with one end of the handle core tube, a connecting rod is coaxially arranged in the catheter and the handle core tube in a sleeved mode, the head end of the connecting rod is close to the bent part, and the tail end of the connecting rod penetrates out of the handle core tube by a certain length. A first spring is arranged in the elbow part of the guide pipe, the first spring can be bent in the elbow part, one end of the first spring is fixedly connected with the connecting rod, the other end of the first spring is fixedly connected with a conical head rod, and a conical head of the conical head rod can stretch out or retract from a port of the elbow part. According to the mouth gag, the function of opening an operation at a specific angle can be achieved, meanwhile, the advancing distance of the conical head rod can be accurately controlled, and positioning is accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of bent openers, belong to surgical medical instrument technical field. BACKGROUND

[0002] The opener is the surgical medical instrument commonly used in surgical operation, is often found in orthopedic surgery, it has conical tip, can drill the surface of bone cortex, can provide accurate opening guide in orthopedic auxiliary navigation surgery, prepare for subsequent opening. The opener in prior art is mainly linear, there is the problem of sight obstruction when doctor operates, more important is, for certain specific surgical sites, linear opener cannot meet the opening of surgical site at specific angle, need to expand wound surface to meet the demand, this can improve the risk and difficulty of operation, therefore it is necessary to design a bent opener. SUMMARY

[0003] In view of the problems in the prior art, the utility model provides a bent opener to solve the problem that the opener cannot open at specific angle in operation.

[0004] The technical scheme of the utility model is as follows:

[0005] A kind of bent opener, including catheter, handle core pipe, the one end of catheter is elbow portion, the other end of catheter and the one end of handle core pipe coaxial fixed connection, coaxially sleeve is provided in catheter and handle core pipe with connecting rod, the head end of connecting rod is close to elbow portion, the tail end of connecting rod is a certain length from handle core pipe and is worn;First spring is provided in the elbow portion of catheter, first spring can be bent in elbow portion, one end of first spring is fixedly connected with connecting rod, the other end of first spring is fixedly connected with conical head rod, the conical head of conical head rod can be stretched out or retracted from the port of elbow portion.

[0006] Further, step hole is provided in the handle core pipe, limit ring is fixedly arranged in the middle part of connecting rod, limit ring is located in step hole, second spring is provided in step hole between limit ring and the end portion of catheter, second spring is sleeved on the connecting rod, in initial state, the conical head of conical head rod is retracted in the port of elbow portion under the elastic driving of second spring.

[0007] Further, a plurality of grooves are provided on the tail of the connecting rod along the length direction, a button device is sleeved on the tail of the connecting rod, the button device is clamped on the connecting rod by the protrusion in its interior and one groove on the connecting rod, so as to control the spacing between button device and the tail of handle core pipe.

[0008] Further, a connecting head is fixedly connected on the tail end of the connecting rod, and the connecting head is used to connect a quick-change handle, and the connecting rod is driven to rotate relative to the catheter and move along the axial direction through the quick-change handle, so that the rotating and advancing actions of the taper head rod are realized.

[0009] Further, a handle sleeve is arranged on the periphery of the handle core tube to facilitate holding and fixing the handle core tube.

[0010] Beneficial effects: the position of the catheter and the angle of the elbow part are fixed by holding the handle sleeve with one hand, and the connecting rod can be driven to rotate and / or advance with the other hand, the first spring is used to drive the taper head rod to move, and the surgical opening function at a specific angle is realized; meanwhile, the distance between the control button device and the tail part of the handle core tube can be controlled, the advancing distance of the taper head rod is accurately controlled, and positioning is accurate. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a front view of the curved mouth gag.

[0012] Figure 2 It is a top view of the curved mouth gag.

[0013] Figure 3 It is Figure 2 a middle AA sectional view.

[0014] Figure 4 It is Figure 3 a middle left end part B area partial enlarged view.

[0015] Figure 5 It is Figure 3 a middle right end part C area partial enlarged view.

[0016] The meaning of the symbol marks in the figure is as follows: 1 catheter, 2 handle, 3 connecting rod, 4 button device, 5 connecting head, 6 first spring, 7 taper head rod, 8 handle core tube, 9 second spring, 11 slot hole, 12 elbow part, 31 limiting ring, 32 groove, 81 step hole. DETAILED DESCRIPTION

[0017] The utility model will be clearly and completely described in detail in combination with the drawings.

[0018] As Figures 1-5 shown, a curved mouth gag comprises a catheter 1, a handle core tube 8, a handle 2, a connecting rod 3, a button device 4, a connecting head 5, a taper head rod 7 and the like. The handle 2 is fixedly arranged outside the handle core tube 8 to facilitate holding and fixing the handle core tube.

[0019] In the handle core tube 8 is provided with a stepped hole 81, the right end of the catheter 1 is inserted into the entrance of the stepped hole of the handle core tube, the right end of the catheter 1 and the left end of the handle core tube 8 are coaxially fixedly connected to make them into one body, a connecting rod 3 is coaxially sleeved in the catheter 1 and the handle core tube 8, the tail end (right end) of the connecting rod 3 is out of the handle core tube 8 by a certain length, the connecting rod can rotate relative to the handle core tube and the catheter, and can also move axially along the axis. In order to facilitate the operation of the connecting rod, a connecting head 5 is also fixedly connected to the right end (tail end) of the connecting rod 3, the connecting head can be used to connect a quick-change handle, so that the connecting rod is driven to rotate relative to the catheter and move axially by the quick-change handle. A limiting ring 31 is fixedly arranged in the middle of the connecting rod 3, the limiting ring 31 is located in the stepped hole 81, a second spring 9 is arranged in the stepped hole between the limiting ring and the end of the catheter, the second spring 9 is sleeved on the connecting rod, in the initial state, the second spring just begins to be compressed, the elastic force of the second spring 9 has a tendency to drive the connecting rod 3 to move axially to the right.

[0020] A plurality of slot holes 11 are arranged on the catheter 1 to facilitate the sterilization of the mouth opener before the operation. The left end of the catheter 1 is designed as an elbow portion 12, the bending angle of the elbow portion is obtuse, and in this example, the bending angle of the elbow portion is 125 degrees, which will not block the view during the operation. The head end of the connecting rod 3 is close to the elbow portion 12, a first spring 6 is arranged in the elbow portion of the catheter, the first spring 6 is bent in the elbow portion 12, the right end of the first spring 6 is fixedly connected with the connecting rod 3, the left end of the first spring 6 is fixedly connected with a tapered rod 7, the head portion of the tapered rod 7 is provided with a sharp tapered head which can pierce human tissues or bones, etc. to open the road. The first spring 6 is a compact spring which only plays a bending and turning guiding role and does not have the telescopic performance, and can transmit the pushing force or pulling force from the connecting rod to the tapered rod, under the driving of the connecting rod 3, the tapered head of the tapered rod 7 can be stretched out or retracted from the port of the elbow portion 12, or can make a rotary cutting action. In the initial state, the tapered head of the tapered rod is retracted in the port of the elbow portion under the elastic driving of the second spring 9.

[0021] In order to accurately control the length of the conical rod 7 extending from the end of the catheter 1, a plurality of grooves 32 are arranged on the right end of the connecting rod 3 in the length direction, and a button device 4 is arranged on the tail of the connecting rod 3, the button device is clamped on the connecting rod by the cooperation of the protrusion in the button device with a groove on the connecting rod, and the protrusion is separated from the groove when the button of the button device is pressed, at this time, the button device can be moved left and right to adjust the distance between the button device and the tail of the handle core tube. When the button device is released after being moved to the appropriate position, the protrusion is lifted by the built-in spring and embedded in the groove again, so that the button device cannot be moved. At this time, the distance between the button device and the tail of the handle core tube is accurately determined, when the quick-change handle is driven to connect the head and push the connecting rod 3 to move left along the axial direction, the second spring 9 is compressed, and the conical rod 7 is gradually exposed under the conduction of the first spring; when the button device 4 on the connecting rod 3 touches the tail of the handle core tube 8, the connecting rod cannot continue to move, at this time, the maximum distance of the conical rod 7 extending is equal to the distance between the button device and the tail of the handle core tube at the beginning, so that the accurate control of the advancing distance of the conical rod is realized, and the positioning is accurate.

[0022] The bending type opening device is subjected to routine disinfection before being used in surgery, when being used in surgery, the distance between the button device and the tail of the handle core tube is adjusted, then one hand holds the handle, the head of the catheter is contacted with the surgery part, and the angle is adjusted, then the other hand operates the quick-change handle, or rotates or applies pressure, so that the conical head of the conical rod extends to open a hole on the human tissue or the bone. The design of the bending head does not block the surgery sight, and facilitates the opening function at a specific angle in surgery, and the surgery efficiency can be obviously improved. When the conical head opens a hole on the bone, the quick-change handle is released, the connecting rod retreats under the driving of the second spring, the connecting rod drives the first spring to retreat, the first spring drives the conical rod to retreat and return to the catheter, and finally the opening device is removed from the surgery part.

Claims

1. A curved speculum, characterized by, The utility model provides a handle core pipe and a connecting rod are coaxially arranged in the pipe, the head end of the connecting rod is close to the elbow, and the tail end of the connecting rod is out of the handle core pipe by a certain length.

2. The curved speculum of claim 1, wherein, A first spring is arranged in the elbow of the pipe, the first spring can be bent in the elbow, one end of the first spring is fixedly connected with the connecting rod, the other end of the first spring is fixedly connected with a taper head rod, and the taper head of the taper head rod can be stretched out or retracted from the port of the elbow.

3. The curved speculum of claim 1, wherein, A stepped hole is arranged in the handle core pipe, a limiting ring is fixedly arranged in the middle part of the connecting rod, the limiting ring is located in the stepped hole, a second spring is arranged in the stepped hole between the limiting ring and the end of the pipe, the second spring is sleeved on the connecting rod, and in the initial state, the taper head of the taper head rod is retracted in the port of the elbow under the elastic driving of the second spring.

4. The curved speculum of claim 1, wherein, A plurality of grooves are arranged on the tail end of the connecting rod along the length direction, a button device is sleeved on the tail end of the connecting rod, the button device is clamped on the connecting rod through the cooperation of the convex on the inside of the button device and one groove on the connecting rod.

5. The curved speculum of claim 1, wherein, A connecting head is further fixedly connected on the tail end of the connecting rod. A handle sleeve is further arranged on the periphery of the handle core pipe.

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