CN217338870U - Lumbar vertebrae operation stick angle measuring tool - Google Patents

Abstract

The embodiment of the application provides a lumbar vertebrae operation stick angular surveying instrument belongs to medical instrument technical field. The angle measuring tool is used for measuring the radian of the surgical rod and comprises a measuring rod and a measuring head part, the length of the measuring rod is adjustable, and two ends of the measuring rod in the length direction are respectively used for being contacted with two ends of the surgical rod in the radian direction; the measuring head part is arranged at the middle position of the measuring rod in the length direction, the length direction of the measuring head part is perpendicular to the length direction of the measuring rod, and one end of the measuring head part, which is far away from the measuring rod, is used for contacting with the middle position of the surgical rod in the radian direction; the measuring head part comprises a sleeve and a sleeve head, the sleeve is connected with the measuring rod, one end, far away from the measuring rod, of the sleeve head is used for being in contact with the operation rod, and the sleeve head penetrates through the sleeve and is in sliding fit with the sleeve so that the length of the measuring head part can be adjusted. The lumbar vertebra operation rod angle measuring tool can improve the angle measuring precision of an operation rod, so that the radian of the operation rod of the orthopedic operation is quantized.

Description

Lumbar vertebrae operation stick angle measuring tool

Technical Field

The application relates to the technical field of medical equipment, in particular to a lumbar vertebra operation rod angle measuring tool.

Background

At present, when bone surgery, need to bend the operation stick, and the operation stick generally adopts bone stick or titanium stick, when bending bone stick or titanium stick, often can't carry out comparatively accurate measurement to the crooked radian of operation stick, and the mode of radian measurement at present generally is the range estimation for the precision of the crooked angle of bone stick or titanium stick is not high, may influence going on smoothly of operation, can influence patient's recovered condition even.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a lumbar vertebrae operation stick angle measurement instrument to improve the angle measurement precision of operation stick, thereby quantify the radian of bone surgery's operation stick, ensure going on smoothly of bone surgery.

The embodiment of the application provides a lumbar vertebra operation rod angle measuring tool, the angle measuring tool is used for measuring the radian of an operation rod, the angle measuring tool comprises a measuring rod and a measuring head part, the length of the measuring rod is adjustable, and two ends of the measuring rod in the length direction are respectively used for being in contact with two ends of the operation rod in the radian direction; the measuring head part is arranged at the middle position of the measuring rod in the length direction, the length direction of the measuring head part is perpendicular to the length direction of the measuring rod, and one end of the measuring head part, which is far away from the measuring rod, is used for contacting with the middle position of the surgical rod in the radian direction; the measuring head part comprises a sleeve and a sleeve head, the sleeve is connected with the measuring rod, one end, far away from the measuring rod, of the sleeve head is used for being in contact with the operation rod, and the sleeve head penetrates through the sleeve and is in sliding fit with the sleeve so that the length of the measuring head part can be adjusted.

In this scheme, length through the measuring stick is adjustable, utilize the measuring stick when carrying out the radian measurement to the operation stick, adjust the length of measuring stick earlier, let the both ends of measuring stick respectively with the both ends contact of the radian direction of operation stick, then adjust the length of head of surveying, let gauge head can with the middle part position contact of the radian direction of operation stick, can obtain the length of measuring stick and the length of head of surveying like this, then through the computational formula of radian and arc length, just can calculate the radian and the arc length of operation stick, thereby quantize the radian of operation stick, ensure going on smoothly of operation. This measuring tool only needs the length of adjusting the measuring stick length and the length of survey head, just can carry out accurate measurement to the operation stick of different radians and different arc length, compares in the radian of traditional range estimation mode judgement operation stick, and the data that obtains through this angle measuring tool measured is more accurate reliable, and measuring mode simple and convenient, can do benefit to going on of bone surgery to the radian and the arc length accurate measurement of operation stick.

In some embodiments, a sliding cavity is formed in the sleeve, the sleeve head penetrates through the sliding cavity and can slide along the length direction of the sliding cavity, a blocking portion is arranged at one end, away from the measuring rod, of the sliding cavity, and the blocking portion is used for limiting the sleeve head to slide out of the sliding cavity.

Among the above-mentioned technical scheme, through be provided with the stop part in sliding the intracavity, the pullover can prevent that pullover slips outside sliding the chamber in the gliding intracavity while, the length adjustment of head of being convenient for survey can measure to the operation stick of different radians, and the regulation mode is simple reliable.

In some embodiments, an elastic member is disposed in the sliding cavity, two ends of the elastic member are respectively abutted against the sleeve head and the bottom wall of the sliding cavity, the elastic member is used for accumulating elastic potential energy when the sleeve head is extruded and slides along the sliding cavity in a direction close to the measuring rod, and the elastic potential energy is used for driving the sleeve head to reset after the sleeve head is separated from the surgical rod.

Among the above-mentioned technical scheme, the elastic component can provide the elastic force for the pullover, when measuring tool carries out the radian measurement to the operation stick, under the elastic component initial state, the length of gauge head portion is generally greater than the distance of measuring stick and the middle part position of operation stick, after gauge head portion and the contact of operation stick, the operation stick just can extrude the gauge head portion automatically, make the elastic component compression, elastic potential energy accumulates, then gauge head portion is extruded after targetting in place, read out the length alright of gauge head portion, consequently, through the setting of elastic component, do not need artificial length of adjusting the gauge head portion, utilize the elastic component just can make gauge head portion and the contact of operation stick, and can realize the length automatically regulated of gauge head portion, operating personnel is when measuring, the operation is swift laborsaving more.

In some embodiments, the sleeve head is provided with a spherical measuring head at an end away from the measuring rod, and the measuring head is used for contacting with the surgical rod.

Among the above-mentioned technical scheme, through being provided with spherical gauge head at the tip of pullover, the gauge head is the point contact when contacting with the middle part position of operation stick, compares in conventional face contact, makes measuring result more accurate through the point contact, and the error is littleer.

In some embodiments, the sleeve head is provided with scale lines and scale values along the length direction thereof, and the scale values at the joint part of the sleeve head and the sleeve pipe are used for displaying the length of the measuring head part.

Among the above-mentioned technical scheme, through being equipped with scale mark and scale interval along its length direction on the pullover to utilize the scale interval to quantify the length of gauge head, only need to overlap the scale interval of head and sleeve pipe handing-over position and carry out the reading alright, medical personnel can be very audio-visual the length of gauge head of reading out, and the reading is simpler.

In some embodiments, the measuring rod comprises a fixed joint and two telescopic joints, the measuring head part is arranged at the middle position of the fixed joint, a cavity is arranged in the fixed joint, and the two telescopic joints are respectively arranged at two ends of the fixed joint, penetrate through the cavity and are in sliding fit with the fixed joint; the fixed joint is provided with a locking piece in a penetrating mode, and the locking piece is used for limiting the telescopic joint to slide along the length direction of the fixed joint.

Among the above-mentioned technical scheme, adjust to set up to telescopic joint and fixed knot sliding fit's form through the length with the measuring rod, two telescopic joints can slide in the fixed knot to adjust the length of measuring rod, after the length adjustment of measuring rod targets in place, carry out the locking through the lock piece to the telescopic joint, prevent the telescopic joint to slide along the fixed knot, just can realize that the length of measuring rod is fixed, through adjusting the length of measuring rod, thereby deal with the operation stick of different arc lengths and measure, the regulative mode is simple and reliable.

In some embodiments, the measuring rod comprises an adjusting part and two connecting parts, the adjusting part is in a hollow tube structure, the inner wall of the adjusting part is provided with an internal threaded part, and the measuring head part is arranged at the middle position of the adjusting part; the length of two connecting portions equals, has external screw thread portion on the connecting portion, and the screw thread of two connecting portions revolves to opposite, two connecting portions respectively with the both ends screw-thread fit of regulation portion, regulation portion is used for being followed its self axis pivoted circumstances, enables two connecting portions and is close to each other or keeps away from the length in order to adjust the measuring rod, and the outer end of two connecting portions equals with the distance of head portion of surveying.

Among the above-mentioned technical scheme, screw-thread fit between two connecting portions and the regulation portion, only need rotate regulation portion, just can adjust the whole length of measuring stick, and under the condition of rotation regulation portion, two connecting portions can be close to in step or keep away from this regulation portion, thereby make two regulation portions can the synchro control, guarantee that the head portion is located the middle part position of whole measuring stick all the time, and the length of measuring stick is adjusted through rotatory mode, the regulation mode is simple, and length adjustment can its length of automatic locking after targetting in place, it is simpler to adjust.

In some embodiments, any one of the two connecting parts is marked with scale lines and scale values at intervals along the length direction of the connecting part, and the scale values at the junction of the connecting part and the adjusting part are used for displaying the length of the measuring rod.

Among the above-mentioned technical scheme, through be provided with scale mark and scale interval on one of them connecting portion in two connecting portions, carry out the special design mark to the scale interval, let the scale interval of connecting portion and the handing-over position department of regulating part show the whole length of measuring stick, when the operation stick to different arc lengths measures like this, put the length adjustment of measuring stick in place the back, only need read out the scale interval of connecting portion and the handing-over position department of regulating part, just can obtain the chord length of operation stick, can quantify the length of measuring stick fast, do not need artificially to adopt the ruler to measure, it is more convenient to operate.

In some embodiments, the adjustment portion is provided with a rotating handle, and the rotating handle is arranged perpendicular to the adjustment portion.

Among the above-mentioned technical scheme, through be provided with twist grip on the regulation portion, twist grip perpendicular to regulation portion sets up, and the medical personnel's of being more convenient for application of force in twist grip, and drives regulation portion and rotate to adjust the length of measuring rod, operate more laborsavingly, convenient and fast.

In some embodiments, the angle measuring tool further comprises a display assembly, the display assembly is arranged on the adjusting portion, the display assembly comprises an input module, a calculating module and a display module, the input module is used for manually inputting the length of the measuring head portion and the length of the measuring rod, the calculating module is used for calculating the radian and the arc length of the surgical rod according to the length of the measuring head portion and the length of the measuring rod, and the display module is used for displaying the radian and the arc length.

Among the above-mentioned technical scheme, through be provided with the display module on the regulating part, medical personnel pass through the input module input through the chord length that will read and the distance value of surveying the head, and the radian and the arc length of operation stick can be worked out according to the formula to the calculation module, show through display module at last, so obtain the radian and the arc length of operation stick fast, be convenient for judge whether the curvature of operation stick meets the requirements.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Figure 1 is a schematic view of a lumbar surgical rod angle measurement tool provided in some embodiments of the present application;

FIG. 2 is a schematic view of the structure of the head of FIG. 1;

FIG. 3 is a schematic view of the radian measurement of a surgical rod.

Icon: 100-a measurement tool; 10-a measuring rod; 11-an adjustment section; 12-a connecting portion; 20-measuring the head; 21-a sleeve; 22-looping; 23-a slide cavity; 24-an elastic member; 25-a measuring head; 26-a barrier; 30-a limiting part; 40-rotating the handle; 50-a display component; 200-surgical rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

The embodiment of the application provides a lumbar vertebra surgical rod angle measuring tool, an angle measuring tool 100 is used for measuring the radian of a surgical rod 200, please refer to fig. 1 and fig. 2, the angle measuring tool 100 comprises a measuring rod 10 and a measuring head part 20, the length of the measuring rod 10 is adjustable, and two ends of the measuring rod 10 in the length direction are respectively used for contacting with two ends of the surgical rod 200 in the radian direction; the measuring head part 20 is arranged at the middle position of the measuring rod 10 in the length direction, the length direction of the measuring head part 20 is perpendicular to the length direction of the measuring rod 10, and one end of the measuring head part 20, which is far away from the measuring rod 10, is used for contacting with the middle position of the surgical rod 200 in the radian direction; the measuring head part 20 comprises a sleeve 21 and a sleeve head 22, the sleeve 21 is connected with the measuring rod 10, one end, far away from the measuring rod 10, of the sleeve head 22 is used for being in contact with the operation rod 200, and the sleeve head 22 penetrates through the sleeve 21 and is in sliding fit with the sleeve 21, so that the length of the measuring head part 20 is adjustable.

In this scheme, length through measuring stick 10 is adjustable, utilize measuring stick 10 when carrying out the radian measurement to operation stick 200, adjust measuring stick 10's length earlier, let the both ends of measuring stick 10 contact with the both ends of the radian direction of operation stick 200 respectively, then the length of readjustment head portion 20, let gauge head portion 20 can contact with the middle part position of the radian direction of operation stick 200, can obtain the length of measuring stick 10 and the length of gauge head portion 20 like this, then through the computational formula of radian and arc length, just can calculate the radian and the arc length of operation stick 200, thereby quantify the radian of operation stick 200, ensure going on smoothly of operation. This measuring tool 100 only needs the length of adjusting measuring stick 10 and the length of head of survey 20, just can carry out accurate measurement to the operation stick 200 of different radians and different arc lengths, compares in the radian that traditional range estimation mode judged operation stick 200, and the data that obtain are measured through this angle measuring tool 100 are more accurate reliable, and measuring means is simple and convenient, can do benefit to going on of bone surgery to the radian and the arc length accurate measurement of operation stick 200.

In some embodiments, the sleeve 21 has a sliding cavity 23 therein, the cuff 22 is disposed through the sliding cavity 23 and can slide along the length direction of the sliding cavity 23, and a blocking portion 26 is disposed at an end of the sliding cavity 23 away from the measuring rod 10, and the blocking portion 26 is used to limit the cuff 22 to slide out of the sliding cavity 23.

Through being provided with stop part 26 in sliding cavity 23, overlap 22 when sliding wantonly in sliding cavity 23, stop part 26 can prevent overlap 22 roll-off outside sliding cavity 23, is convenient for survey the length adjustment of head 20, can measure to the operation stick 200 of different radians, and the regulative mode is simple reliable.

In some embodiments, an elastic member 24 is disposed in the sliding cavity 23, two ends of the elastic member 24 are respectively abutted against the sleeve head 22 and the bottom wall of the sliding cavity 23, and the elastic member 24 is used for accumulating elastic potential energy when the sleeve head 22 is pressed and slides along the sliding cavity 23 in a direction close to the measuring rod 10, and the elastic potential energy is used for driving the sleeve head 22 to reset after the sleeve head 22 is separated from the surgical rod 200.

The elastic part 24 can provide elastic force for the sleeve head 22, when the measuring tool measures the radian of the surgical rod 200, in the initial state of the elastic part 24, the length of the measuring head part 20 is generally larger than the distance between the measuring rod 10 and the middle position of the surgical rod 200, after the measuring head part 20 contacts the surgical rod 200, the surgical rod 200 can automatically extrude the measuring head part 20, so that the elastic part 24 compresses, elastic potential energy is accumulated, then the measuring head part 20 is extruded in place, and the length of the measuring head part 20 can be read.

The elastic member 24 may be a spring, a rubber rod, or other elastic material. In the present embodiment, the elastic member 24 is a spring.

In some embodiments, the end of the cuff 22 remote from the measurement shaft 10 is provided with a spherical probe 25, and the probe 25 is used for contacting the surgical rod 200. By providing the spherical probe 25 at the end of the cuff 22, the probe 25 is in point contact with the middle of the surgical rod 200, and compared with the conventional surface contact, the point contact makes the measurement result more accurate and less error.

In some embodiments, the sleeve head 22 is provided with scale lines and scale values along the length direction thereof, and the scale values at the joint of the sleeve head 22 and the sleeve 21 are used for displaying the length of the measuring head 20. Through being equipped with scale mark and scale interval along its length direction on pullover 22 to utilize the scale interval to quantify the length of gauge head portion 20, only need to carry out the reading to the scale interval of pullover 22 and sleeve pipe 21 handing-over position alright, medical personnel can be very audio-visual the length of gauge head portion 20 of reading out, and the reading is simpler.

Wherein, the length adjustment of measuring stick can be that the multiple mode is adjusted, can be flexible the regulation, also can be that thread fit realizes length adjustment.

Optionally, the measuring rod 10 includes a fixed joint and two telescopic joints, the measuring head portion 20 is disposed at a middle position of the fixed joint, a cavity is disposed in the fixed joint, and the two telescopic joints are respectively located at two ends of the fixed joint, penetrate through the cavity, and are in sliding fit with the fixed joint; the fixed knot is worn to be equipped with the locking piece, and the locking piece is used for restricting the telescopic joint and slides along the length direction of fixed knot.

Through setting up the length adjustment with measuring stick 10 into telescopic joint and fixed knot sliding fit's form, two telescopic joints can slide in the fixed knot, thereby adjust the length of measuring stick 10, after the length adjustment of measuring stick 10 targets in place, carry out the locking through the locking piece to the telescopic joint, prevent the telescopic joint along the fixed knot slip, just can realize the length fixation of measuring stick 10, through the length of adjusting measuring stick 10, thereby deal with the operation stick 200 measurement of different arc lengths, the adjustment mode is simple and reliable.

Optionally, referring to fig. 1, the measuring rod 10 includes an adjusting portion 11 and two connecting portions 12, the adjusting portion 11 is a hollow tube structure, an inner wall of the adjusting portion 11 has an internal threaded portion, and the measuring head portion 20 is disposed at a middle position of the adjusting portion 11; the length of two connecting portions 12 is equal, the connecting portions 12 are provided with external thread portions, the thread turning directions of the two connecting portions 12 are opposite, the two connecting portions 12 are respectively in thread fit with two ends of the adjusting portion 11, the adjusting portion 11 is used for enabling the two connecting portions 12 to be close to or far away from each other to adjust the length of the measuring rod 10 under the condition that the adjusting portion rotates along the axis of the adjusting portion 11, and the distance between the outer ends of the two connecting portions 12 and the measuring head portion 20 is equal.

Screw-thread fit between two connecting portion 12 and the regulation part 11, only need rotate regulation part 11, just can adjust measuring stick 10's whole length, and under the condition of rotating regulation part 11, two connecting portion 12 can be close to or keep away from this regulation part 11 in step, thereby make two regulation parts 11 can the synchro-control, guarantee that head portion 20 is located the middle part position of whole measuring stick 10 all the time, and adjust measuring stick 10's length through rotatory mode, the regulation mode is simple, and its length can automatic locking after length adjustment targets in place, it is simpler to adjust.

The outer end of the connecting portion 12 is provided with a limiting portion 30, and in the axial orthographic projection of the measuring rod 10, the limiting portion 30 is overlapped with the orthographic projection of the adjusting portion 11. The limiting parts 30 are used for providing a supporting effect for the outer ends of the surgical rod 200, and the limiting parts 30 at the outer ends of the two connecting parts 12 can support and limit the two ends of the surgical rod 200, so that the accuracy of data in the measuring process is ensured.

In some embodiments, any one of the two connecting portions 12 is marked with scale lines and scale values at intervals along the length direction thereof, and the scale values at the junction of the connecting portion 12 and the adjusting portion 11 are used for displaying the length of the measuring stick 10.

Through being provided with scale mark and scale interval on one of them connecting portion 12 in two connecting portion 12, carry out the special design mark to the scale interval, let the scale interval of connecting portion 12 and the junction of regulating part 11 department show the whole length of measuring stick 10, when measuring to the operation stick 200 of different arc lengths like this, put in place the length adjustment of measuring stick 10, only need read out the scale interval of the junction of connecting portion 12 and regulating part 11 department, just can obtain the chord length of operation stick 200, can quantify the length of measuring stick 10 fast, do not need artificially to adopt the ruler to measure, it is more convenient to operate.

In some embodiments, the adjustment portion 11 is provided with a rotation handle 40, and the rotation handle 40 is disposed perpendicular to the adjustment portion 11. Through being provided with twist grip 40 on regulation portion 11, twist grip 40 perpendicular to regulation portion 11 sets up, the medical personnel's application of force of being more convenient for in twist grip 40, and drives regulation portion 11 and rotate to adjust the length of measuring stick 10, the operation is more laborsaving, convenient and fast.

In some embodiments, the angle measuring tool 100 further includes a display component 50, the display component 50 is disposed on the adjusting portion 11, the display component 50 includes an input module, a calculating module and a display module, the input module is used for manually inputting the length of the head measuring portion 20 and the length of the measuring rod 10, the calculating module is used for calculating the arc and the arc length of the surgical rod 200 according to the length of the head measuring portion 20 and the length of the measuring rod 10, and the display module is used for displaying the arc and the arc length.

Through being provided with display module 50 on regulating part 11, medical personnel are through the chord length that will read and survey the distance value of head 20 and pass through input module input, and the radian and the arc length of operation stick 200 can be worked out according to the formula to the calculation module, show through the display module at last, so obtain the radian and the arc length of operation stick 200 fast, be convenient for judge whether the curvature of operation stick 200 meets the requirements.

Please refer to fig. 3, the calculation formula of the calculation module may be: assuming that the circle radius of the surgical rod is R and the circle angle is 2 α, the length of the input measuring rod can be the chord length L, and the length of the input measuring head can be h. Thus R ² ＝(L/2) ² +(R-h) ² Since L and h are known, R can be calculated. Assuming that L/2 is equal to b, and thus the central angle 2 α is equal to 2arcsin (b/R), the central angle 2 α can be calculated. Finally, the arc length is 2R α, thus allowing for surgeryThe arc and arc length of the rod 200. The information of the radius, the radian, the arc length and the like of the surgical rod 200 can be displayed on the display module.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a lumbar vertebrae operation stick angle measuring tool for measure the radian of operation stick, its characterized in that includes:

the length of the measuring rod is adjustable, and two ends of the measuring rod in the length direction are respectively used for being in contact with two ends of the surgical rod in the radian direction;

the head measuring part is arranged at the middle position of the measuring rod, the length direction of the head measuring part is perpendicular to the length direction of the measuring rod, and one end of the head measuring part, which is far away from the measuring rod, is used for being in contact with the middle position of the surgical rod in the radian direction;

the head measuring part comprises a sleeve and a sleeve head, the sleeve is connected with the measuring rod, one end, far away from the measuring rod, of the sleeve head is used for being in contact with the surgical rod, and the sleeve head penetrates through the sleeve and is in sliding fit with the sleeve, so that the length of the head measuring part is adjustable.

2. The lumbar surgical rod angle measuring tool of claim 1, wherein the sleeve has a sliding cavity therein, the sleeve head is inserted into the sliding cavity and can slide along the length direction of the sliding cavity, and a blocking portion is disposed at an end of the sliding cavity away from the measuring rod, and the blocking portion is used for limiting the sleeve head from sliding out of the sliding cavity.

3. The lumbar surgical rod angle measuring tool of claim 2, wherein an elastic member is disposed in the sliding chamber, two ends of the elastic member are respectively abutted against the sleeve head and the bottom wall of the sliding chamber, the elastic member is used for accumulating elastic potential energy when the sleeve head is pressed and slides along the sliding chamber in a direction close to the measuring rod, and the elastic potential energy is used for driving the sleeve head to reset after the sleeve head is separated from the surgical rod.

4. The lumbar surgical rod angle measuring tool of claim 3 wherein an end of said cuff distal from said measuring rod is provided with a spherical probe for contacting said surgical rod.

5. The lumbar surgical rod angle measuring tool of claim 4, wherein said cuff is provided with graduation lines and graduation values along the length direction thereof, and the graduation value of the joint portion of said cuff and said sleeve is used for displaying the length of said head measuring portion.

6. The lumbar surgery rod angle measuring tool according to claim 5, wherein the measuring rod comprises a fixed joint and two telescopic joints, the measuring head is arranged at the middle position of the fixed joint, a cavity is arranged in the fixed joint, and the two telescopic joints are respectively arranged at two ends of the fixed joint, penetrate through the cavity and are in sliding fit with the fixed joint; the fixing section is provided with a locking piece in a penetrating mode, and the locking piece is used for limiting the telescopic section to slide along the length direction of the fixing section.

7. The lumbar surgical rod angle measuring tool of claim 5, wherein said measuring rod comprises:

the adjusting part is of a hollow pipe structure, the inner wall of the adjusting part is provided with an internal thread part, and the head measuring part is arranged at the middle position of the adjusting part;

two connecting portions, the length of two connecting portions equals, the external screw thread portion has on the connecting portion, just the screw thread of two connecting portions is to opposite soon, two connecting portions respectively with the both ends screw-thread fit of regulating part, the regulating part is used for making under its self axis pivoted condition, two connecting portions are close to each other or keep away from in order to adjust the length of measuring rod, just the outer end of two connecting portions with the distance of head portion equals.

8. The lumbar surgical rod angle measuring tool of claim 7, wherein either one of the two connection portions is engraved with graduation lines and graduation values at intervals along a length direction thereof, and the graduation value at a junction of the connection portion and the adjustment portion is used to display a length of the measuring rod.

9. The lumbar surgical rod angle measuring tool of claim 7, wherein said adjustment portion is provided with a rotating handle, said rotating handle being disposed perpendicular to said adjustment portion.

10. The lumbar surgical rod angle measuring tool of claim 8, wherein said angle measuring tool further comprises: the display module, the display module set up in on the regulation portion, the display module includes input module, calculation module and display module, input module is used for manual entry the length of measuring head portion and the length of measuring rod, the calculation module is used for according to the length of measuring head portion and the length of measuring rod calculates the radian and the arc length of operation stick, the display module is used for showing the radian and the arc length.

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