Guide pin measuring device

Abstract

The utility model discloses a guide pin measuring device, which is characterized in that a second measuring rod can be switched between a measuring position and a folding position relative to a first measuring rod, when the second measuring rod is in the measuring position, the metering directions of a first scale line and a second scale line are the same, and a first locking part and a second locking part are matched to lock the first measuring rod and the second measuring rod; and the positions of the first measuring rod and the second measuring rod are kept stable, so that the insertion depths of the short guide pin and the long guide pin can be measured through the guide pin measuring tool. When only a short guide pin needs to be measured or the guide pin measuring device is used, the second measuring rod can be rotated to the folding position, and the second measuring rod and the first measuring rod are at least partially folded, so that the length of the guide pin measuring device is shortened, the guide pin measuring device can be conveniently placed in a small-size instrument box after measurement is finished, and storage is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a guide needle measuring device. Background Art

[0002] In the intramedullary nail implantation surgery, it is usually necessary to use a guide needle measuring device to measure the insertion depth of the guide needle, and then select the length of the main intramedullary nail to be implanted according to the insertion depth of the guide needle. The guide needle usually includes a long guide needle and a short guide needle. In order to meet the measurement requirements of both the short guide needle and the long guide needle, the guide needle measuring device usually needs to have a longer length, which leads to the problem of inconvenience in storing the guide needle measuring device. Utility Model Content

[0003] An embodiment of the present application provides a guide needle measuring device, which aims to solve the problem that the guide needle measuring device is long and thus inconvenient to store.

[0004] The present application provides a guide needle measuring device, comprising:

[0005] A first measuring rod, wherein the first measuring rod is provided with a first scale line extending along a length direction thereof;

[0006] a second measuring rod, wherein the second measuring rod is provided with a second scale line extending along the length direction thereof, the second measuring rod is movably connected to the first measuring rod, and the second measuring rod can be switched between a measuring position and a folding position relative to the first measuring rod; when the second measuring rod is in the measuring position, the first scale line and the second scale line have the same measuring direction; when the second measuring rod is in the folding position, the second measuring rod and the first measuring rod are at least partially folded in the same length direction;

[0007] Wherein, the first measuring rod includes a first locking portion, and the second measuring rod includes a second locking portion. When the second measuring rod is in the measuring position, the first locking portion cooperates with the second locking portion to lock the first measuring rod and the second measuring rod.

[0008] In some embodiments, the second locking portion includes a first locking groove, the first locking portion includes a first clamping portion, and when the second measuring rod is in the measuring position, the first clamping portion is clamped with the first locking groove.

[0009] In some embodiments, the second measuring rod moves within a reference plane relative to the first measuring rod, and the second locking portion includes a first side edge and a second side edge relative to each other, and the first side edge and the second side edge are distributed on both sides of the second locking portion along a direction parallel to the reference plane; the second locking portion includes a first notch connected to the first card slot, and the first notch is located on the first side edge of the second locking portion, and the first notch is used for allowing the first card connection portion to be inserted into the first card slot.

[0010] In some embodiments, the second locking portion includes a first clamping portion and a second clamping portion arranged opposite to each other, and a first connecting portion connecting the first clamping portion and the second clamping portion, and the first card slot is formed between the first clamping portion and the second clamping portion; at least one of the first clamping portion and the second clamping portion is elastic; or, the first clamping portion is interference fit with the first card slot.

[0011] In some embodiments, the first card slot penetrates the second locking portion along a direction perpendicular to the reference plane; the first clamping portion includes a first end and a second end opposite to each other, the first end is connected to the first connecting portion, and the second end is a free end.

[0012] In some embodiments, the first clamping portion extends from the first end to the second end along a direction from the first side to the second side; and the first clamping groove is close to the second end.

[0013] In some embodiments, the second measuring rod includes a hinged portion, which is rotatably connected to the first measuring rod; the second locking portion and the hinged portion are distributed sequentially along the length direction of the second measuring rod, and the first clamping portion is located between the hinged portion and the second clamping portion; or, the second clamping portion is located between the hinged portion and the first clamping portion.

[0014] In some embodiments, the second measuring rod can be rotatably connected relative to the first measuring rod around the center point; the second locking portion includes a first connecting groove connected between the first notch and the first card slot, the first connecting groove extends along an arc, and the center of the arc coincides with the center point.

[0015] In some embodiments, the first measuring rod includes a third locking portion, and the second measuring rod includes a fourth locking portion, and when the second measuring rod is in the folded position, the third locking portion cooperates with the fourth locking portion to lock the first measuring rod and the second measuring rod.

[0016] In some embodiments, the fourth locking portion includes a second locking groove, the third locking portion includes a second clamping portion, and when the second measuring rod is in the folded position, the second clamping portion is clamped with the second locking groove.

[0017] In some embodiments, the fourth locking portion is symmetrically arranged with respect to the second locking portion.

[0018] In some embodiments, the first locking portion and the third locking portion are the same locking portion.

[0019] In some embodiments, the first measuring rod includes a mating section and a connecting section connected in sequence along its length direction, and one end of the connecting section away from the mating section is movably connected to the second measuring rod; the mating section includes a mating groove extending along the length direction of the first measuring rod, and the mating groove is used for the guide needle to be embedded.

[0020] The guide needle measuring device provided in the embodiment of the present application enables the second measuring rod to switch between a measuring position and a folding position relative to the first measuring rod. When the second measuring rod is in the measuring position, the measuring directions of the first scale line and the second scale line are the same. The first locking portion cooperates with the second locking portion to lock the first measuring rod and the second measuring rod, so that the positions of the first measuring rod and the second measuring rod remain stable, so as to facilitate the measurement of the insertion depth of short guide needles and long guide needles by the guide needle measuring tool.

[0021] When only a short guide needle needs to be measured or the guide needle measuring device has been used, the second measuring rod can be rotated to the folded position so that the second measuring rod and the first measuring rod are at least partially folded to shorten the length of the guide needle measuring device, so that the guide needle measuring device can be loaded into a smaller instrument box after the measurement, making storage more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0023] Figure 1 A schematic structural diagram of an embodiment of a guide needle measuring device provided in an embodiment of the present application, wherein the second measuring rod is in a measuring position;

[0024] Figure 2 for Figure 1 Rear view of the guide needle measuring device;

[0025] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 for Figure 1 Bottom view of the guide needle measuring device;

[0027] Figure 5 A schematic diagram of the exploded structure of an embodiment of a guide needle measuring device provided in an embodiment of the present application;

[0028] Figure 6 for Figure 5 The enlarged view of point B in the middle;

[0029] Figure 7 A schematic structural diagram of an embodiment of a guide needle measuring device provided in an embodiment of the present application, wherein the second measuring rod is in a folded position;

[0030] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0031] Fig. 9 for Figure 7 A top view of the guide needle measuring device;

[0032] Fig.10 for Fig. 9 Enlarged view of point D in the middle.

[0033] Guide needle measuring device 100; first measuring rod 110; first scale line 1101; matching section 111; matching portion 1111; matching groove 1112; connecting section 112; first locking portion 113; base 1131; first clamping portion 1132; second hinge hole 114; third locking portion 115; second clamping portion 1151; second measuring rod 120; second scale line 1201; second locking portion 121; first clamping portion 1211; first end 1212; second end 1213; second clamping portion 1214; first clamping groove 1215; first connecting portion 1 216; first side 1217; first notch 1218; second side 1219; first connecting groove 1220; fourth locking portion 122; third clamping portion 1221; third end 1222; fourth end 1223; fourth clamping portion 1224; second clamping groove 1225; second connecting portion 1226; third side 1227; second notch 1228; fourth side 1229; second connecting groove 1230; hinge portion 123; first hinge hole 1231; hinge shaft 130; reference plane P; rotation axis X; center point O; arc H1; arc H2. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific processes and examples of materials, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0039] The present application provides a guide needle measuring device. The following describes in detail different embodiments of the guide needle measuring device.

[0040] Figure 1 This is a schematic diagram of the structure of an embodiment of the guide needle measuring device provided in the present application. Figure 1 As shown, the guide needle measuring device 100 includes a first measuring rod 110, and the first measuring rod 110 is provided with a first scale line 1101 extending along its length direction. In the intramedullary nail implantation surgery, after the guide needle (not shown in the figure) is implanted into the patient's body, by contacting one end of the first measuring rod 110 with the patient, and arranging the first measuring rod 110 and the guide needle in parallel, the scale value on the first scale line 1101 corresponding to the end face of the tail end of the guide needle can be read, and the depth of the guide needle implanted into the patient's body can be measured.

[0041] The first measuring rod 110 includes a matching section 111 and a connecting section 112 which are sequentially connected along its length direction. The matching section 111 is used to match with the guide needle so that the first measuring rod 110 can be more accurately aligned with the guide needle to improve the measurement accuracy of the first measuring rod 110 on the guide needle. Figure 1 and Figure 5 As shown, the matching section 111 of the first measuring rod 110 includes a matching groove 1112 extending along the length direction of the first measuring rod 110. The matching groove 1112 is used for the guide needle to be inserted, so that the matching between the matching section 111 of the first measuring rod 110 and the guide needle is more stable.

[0042] Specifically, a mating portion 1111 is convexly provided on one side of the mating section 111 of the first measuring rod 110, and the mating portion 1111 protrudes from the surface of the connecting section 112. The mating groove 1112 is provided on one side surface in the protruding direction of the mating portion 1111, and extends along the length direction of the first measuring rod 110. The inner circumference of the mating groove 1112 is adapted to the outer circumference of the guide needle, so that the guide needle can be stably embedded in the mating groove 1112, so that the relative position of the guide needle and the first measuring rod 110 is more stable.

[0043] The first scale lines 1101 are distributed on one side surface of the protruding direction of the matching portion 1111 and the surface of the connecting section 112, and the scale values ​​of the first scale lines 1101 gradually decrease in the direction from the matching section 111 to the connecting section 112. Of course, the scale values ​​of the first scale lines 1101 may also gradually increase in the direction from the matching section 111 to the connecting section 112, as long as the length of the guide needle can be measured through the first scale lines 1101.

[0044] Since guide needles usually include long guide needles and short guide needles, in order to simultaneously meet the measurement requirements of short guide needles and long guide needles, the guide needle measuring device 100 usually needs to have a longer length, resulting in the problem of inconvenience in storing the guide needle measuring device 100.

[0045] In order to solve the above problems, the present application also provides a guide needle measuring device 100. Figure 1 and Figure 7 As shown, the guide needle measuring device 100 further includes a second measuring rod 120, the second measuring rod 120 is provided with a second scale line 1201 extending along its length direction, the second measuring rod 120 is movably connected to the first measuring rod 110, and the second measuring rod 120 can be relative to the first measuring rod 110 in the measuring position (such as Figure 1 as shown) and folded position (as shown Figure 7 when the second measuring rod 120 is in the measuring position, the measuring directions of the first scale line 1101 and the second scale line 1201 are the same; when the second measuring rod 120 is in the folding position, the second measuring rod 120 and the first measuring rod 110 are at least partially folded in the same length direction.

[0046] It should be noted that the measuring directions of the first scale line 1101 and the second scale line 1201 are the same, which means that the extension directions of the first scale line 1101 and the second scale line 1201 are the same, and the numerical changes of the first scale line 1101 and the second scale line 1201 are consistent. For example: when the second measuring rod 120 is in the measuring position, the extension directions of the first scale line 1101 and the second scale line 1201 are parallel, and in the direction from the first measuring rod 110 to the second measuring rod 120, the scale values ​​of the first scale line 1101 and the second scale line 1201 gradually decrease or gradually increase.

[0047] In some embodiments, one end of the connecting section 112 of the first measuring rod 110 away from the matching section 111 is movably connected to the second measuring rod 120 , so that the second measuring rod 120 is movably connected to the first measuring rod 110 .

[0048] In some embodiments, Figure 2 , Figure 3 and Figure 6As shown, the first measuring rod 110 includes a first locking portion 113 , and the second measuring rod 120 includes a second locking portion 121 . When the second measuring rod 120 is in the measuring position, the first locking portion 113 cooperates with the second locking portion 121 to lock the first measuring rod 110 and the second measuring rod 120 .

[0049] The guide needle measuring device 100 provided in the embodiment of the present application enables the second measuring rod 120 to switch between a measuring position and a folding position relative to the first measuring rod 110, and when the second measuring rod 120 is in the measuring position, the measuring directions of the first scale line 1101 and the second scale line 1201 are the same, and the first locking portion 113 cooperates with the second locking portion 121 to lock the first measuring rod 110 and the second measuring rod 120, so that the positions of the first measuring rod 110 and the second measuring rod 120 remain stable, so as to facilitate the measurement of the insertion depth of short guide needles and long guide needles by a guide needle measuring tool.

[0050] When only a short guide needle needs to be measured or the guide needle measuring device 100 has been used, the second measuring rod 120 can be rotated to the folded position so that the second measuring rod 120 and the first measuring rod 110 are at least partially folded to shorten the length of the guide needle measuring device 100, so that the guide needle measuring device 100 can be put into a smaller instrument box after the measurement, which is more convenient to store.

[0051] In some embodiments, Figure 4 , Fig. 9 and Fig.10 As shown, the second measuring rod 120 can be rotatably connected to the first measuring rod 110, so that the second measuring rod 120 can be rotated between the measuring position and the folding position relative to the first measuring rod 110. The second measuring rod 120 includes a hinge 123, which is rotatably connected to the first measuring rod 110, so that the second measuring rod 120 is rotatably connected to the first measuring rod 110.

[0052] Specifically, the hinge portion 123 of the second measuring rod 120 is provided with a first hinge hole 1231, and the first measuring rod 110 is provided with a second hinge hole 114. The guide needle measuring device 100 includes a hinge shaft 130, which is inserted into the first hinge hole 1231 and the second hinge hole 114, thereby rotatably connecting the hinge portion 123 with the first measuring rod 110, so that the second measuring rod 120 can rotate around the rotation axis X relative to the first measuring rod 110.

[0053] Of course, the first measuring rod 110 and the second measuring rod 120 in the embodiment of the present application may also be movably connected in other ways, as long as the second measuring rod 120 can be movable between the measuring position and the folding position relative to the first measuring rod 110.

[0054] In some embodiments, when the second measuring rod 120 is in the measuring position, the first locking portion 113 and the second locking portion 121 can be engaged with each other to lock the first measuring rod 110 and the second measuring rod 120. Figure 3 and Figure 6 As shown, the second locking portion 121 of the second measuring rod 120 includes a first slot 1215 , and the first locking portion 113 of the first measuring rod 110 includes a first clamping portion 1132 . When the second measuring rod 120 is in the measuring position, the first clamping portion 1132 is clamped with the first slot 1215 .

[0055] Therefore, the first locking portion 113 and the second locking portion 121 can be locked together by simply inserting the first clamping portion 1132 into the first clamping slot 1215, and the first locking portion 113 and the second locking portion 121 can be released from the locking cooperation by withdrawing the first clamping portion 1132 from the first clamping slot 1215, which is very convenient to operate.

[0056] like Figure 3 and Figure 6 As shown, the second measuring rod 120 moves relative to the first measuring rod 110 in the reference plane P. When the second measuring rod 120 is rotatably connected to the first measuring rod 110, the second measuring rod 120 can rotate relative to the first measuring rod 110 around the rotation axis X, which is perpendicular to the reference plane P.

[0057] The second locking portion 121 includes a first side edge 1217 and a second side edge 1219 opposite to each other, and the first side edge 1217 and the second side edge 1219 are distributed on both sides of the second locking portion 121 along a direction parallel to the reference plane P. When the second measuring rod 120 moves from the folding position to the measuring position relative to the first measuring rod 110, the second side edge 1219 and the first side edge 1217 are distributed in sequence along the moving direction of the second locking portion 121.

[0058] The second locking portion 121 includes a first notch 1218 communicating with the first slot 1215, the first notch 1218 is located at the first side 1217 of the second locking portion 121, and the first notch 1218 is used for the first clamping portion 1132 to be inserted into the first slot 1215. When the second measuring rod 120 moves in the reference plane P relative to the first measuring rod 110, the second locking portion 121 moves in the reference plane P relative to the first locking portion 113. By providing the first notch 1218 communicating with the first slot 1215 at the first side 1217 of the second locking portion 121, when the second measuring rod 120 moves from the folding position to the measuring position relative to the first measuring rod 110, the first clamping portion 1132 can be accurately inserted into the first notch 1218 and enter the first slot 1215 to be clamped with the first slot 1215.

[0059] In some embodiments, the second locking portion 121 includes a first clamping portion 1211 and a second clamping portion 1214 that are arranged opposite to each other, and a first connecting portion 1216 that connects the first clamping portion 1211 and the second clamping portion 1214, and a first clamping groove 1215 is formed between the first clamping portion 1211 and the second clamping portion 1214. Among them, at least one of the first clamping portion 1211 and the second clamping portion 1214 is elastic, so that after the first clamping portion 1132 is inserted into the first clamping groove 1215, at least one of the first clamping portion 1211 and the second clamping portion 1214 can clamp the first clamping portion 1132 more stably through elastic deformation, thereby making the first locking portion 113 and the second locking portion 121 more stably locked and matched.

[0060] It should be noted that the first clamping portion 1211 and the second clamping portion 1214 may both have elasticity, or only the first clamping portion 1211 or the second clamping portion 1214 may have elasticity, which may be determined according to the structures of the first clamping portion 1211 and the second clamping portion 1214 .

[0061] In some embodiments, the first clamping groove 1215 penetrates the second locking portion 121 in a direction perpendicular to the reference plane P, so that the first clamping portion 1132 passes through the first notch 1218 and enters the first clamping groove 1215. Specifically, the first locking portion 113 includes a base 1131 and a first clamping portion 1132, and the first clamping portion 1132 extends in a direction perpendicular to the reference plane P. One end of the first clamping portion 1132 is connected to the base 1131, and the other end of the first clamping portion 1132 is a free end. When the second measuring rod 120 moves from the folding position to the measuring position, the first clamping portion 1132 passes through the first notch 1218 in a direction parallel to the reference plane P and is inserted into the first clamping groove 1215.

[0062] The first clamping portion 1211 includes a first end 1212 and a second end 1213 opposite to each other, wherein the first end 1212 is connected to the first connecting portion 1216, and the second end 1213 is a free end. Thus, the elasticity of the first clamping portion 1211 can be increased, so that the first clamping portion 1211 is more easily elastically deformed, so that the first clamping portion 1211 and the second clamping portion 1214 cooperate to clamp the first clamping portion 1132.

[0063] The first clamping portion 1211 extends from the first end 1212 to the second end 1213 along the direction from the first side 1217 to the second side 1219. The first clamping groove 1215 is close to the second end 1213. It can be understood that the closer the first clamping portion 1211 is to the free end, the easier it is to produce elastic deformation. By making the first clamping groove 1215 close to the second end 1213 of the first clamping portion 1211, when the first clamping portion 1132 is inserted into the first clamping groove 1215, the free end of the first clamping portion 1211 can produce a large elastic deformation to avoid the first clamping portion 1132, and after the first clamping portion is inserted into the first clamping groove 1215, the first clamping portion 1211 cooperates with the second clamping portion 1214 to clamp the first clamping portion 1132.

[0064] In other embodiments, the first clamping portion 1132 may be interference-fitted with the first clamping slot 1215 to lock the first locking portion 113 and the second locking portion 121. The first clamping portion 1211 and the second clamping portion 1214 may be elastic or inelastic.

[0065] In some embodiments, Figure 3 As shown, the second locking portion 121 and the hinge portion 123 are sequentially distributed along the length direction of the second measuring rod 120, and the first clamping portion 1211 is located between the hinge portion 123 and the second clamping portion 1214. Of course, the second clamping portion 1214 can be located between the hinge portion 123 and the first clamping portion 1211.

[0066] In some embodiments, Figure 3 As shown, the second measuring rod 120 can be rotatably connected relative to the first measuring rod 110 around the center point O. The second locking portion 121 includes a first connecting groove 1220 connected between the first notch 1218 and the first clamping groove 1215, and the first connecting groove 1220 extends along the arc H1, and the center of the arc H1 coincides with the center point O. Therefore, when the second measuring rod 120 rotates from the folding position to the measuring position, the first connecting groove 1220 between the first notch 1218 and the first clamping groove 1215 can avoid the first clamping portion 1132, so that the first clamping portion 1132 smoothly enters the first clamping groove 1215.

[0067] In some embodiments, Figure 3 , Figure 6 and Figure 8As shown, the first measuring rod 110 includes a third locking portion 115, and the second measuring rod 120 includes a fourth locking portion 122. When the second measuring rod 120 is in the folded position, the third locking portion 115 cooperates with the fourth locking portion 122 to lock the first measuring rod 110 and the second measuring rod 120. Therefore, when the second measuring rod 120 is in the folded position, the third locking portion 115 cooperates with the fourth locking portion 122 to stably maintain the second measuring rod 120 in the folded position, thereby preventing the second measuring rod 120 from being unfolded when not in use.

[0068] In some embodiments, when the second measuring rod 120 is in the measuring position, the third locking portion 115 and the fourth locking portion 122 can be engaged with each other to lock the first measuring rod 110 and the second measuring rod 120. Figure 3 , Figure 6 and Figure 8 As shown, the fourth locking portion 122 of the second measuring rod 120 includes a second slot 1225 , and the third locking portion 115 of the first measuring rod 110 includes a second clamping portion 1151 . When the second measuring rod 120 is in the measuring position, the second clamping portion 1151 is clamped with the second slot 1225 .

[0069] Therefore, the third locking portion 115 and the fourth locking portion 122 can be locked together by simply inserting the second clamping portion 1151 into the second clamping slot 1225, and the third locking portion 115 and the fourth locking portion 122 can be released from the locking cooperation by withdrawing the second clamping portion 1151 from the second clamping slot 1225, which is very convenient to operate.

[0070] The second measuring rod 120 moves relative to the first measuring rod 110 in the reference plane P. When the second measuring rod 120 is rotatably connected to the first measuring rod 110 , the second measuring rod 120 can rotate relative to the first measuring rod 110 around the rotation axis X, which is perpendicular to the reference plane P.

[0071] The fourth locking portion 122 includes a third side 1227 and a fourth side 1229 that are opposite to each other, and the third side 1227 and the fourth side 1229 are distributed on both sides of the fourth locking portion 122 along a direction parallel to the reference plane P. When the second measuring rod 120 moves from the folding position to the measuring position relative to the first measuring rod 110, the fourth side 1229 and the third side 1227 are distributed in sequence along the moving direction of the fourth locking portion 122.

[0072] The fourth locking portion 122 includes a second notch 1228 communicating with the second card slot 1225, and the second notch 1228 is located on the third side 1227 of the fourth locking portion 122. The second notch 1228 is used for the second clamping portion 1151 to be inserted into the second card slot 1225. When the second measuring rod 120 moves in the reference plane P relative to the first measuring rod 110, the fourth locking portion 122 moves in the reference plane P relative to the third locking portion 115. By providing the second notch 1228 communicating with the second card slot 1225 on the third side 1227 of the fourth locking portion 122, when the second measuring rod 120 moves from the folding position to the measuring position relative to the first measuring rod 110, the second clamping portion 1151 can be accurately inserted into the second notch 1228 and enter the second card slot 1225 to be clamped with the second card slot 1225.

[0073] In some embodiments, the fourth locking portion 122 includes a third clamping portion 1221 and a fourth clamping portion 1224 that are arranged opposite to each other, and a second connecting portion 1226 that connects the third clamping portion 1221 and the fourth clamping portion 1224, and a second clamping groove 1225 is formed between the third clamping portion 1221 and the fourth clamping portion 1224. Among them, at least one of the third clamping portion 1221 and the fourth clamping portion 1224 is elastic, so that after the second clamping portion 1151 is inserted into the second clamping groove 1225, at least one of the third clamping portion 1221 and the fourth clamping portion 1224 can clamp the second clamping portion 1151 more stably through elastic deformation, thereby making the third locking portion 115 and the fourth locking portion 122 more stably locked and matched.

[0074] It should be noted that the third clamping portion 1221 and the fourth clamping portion 1224 may both have elasticity, or only the third clamping portion 1221 or the fourth clamping portion 1224 may have elasticity, which may be determined according to the structures of the third clamping portion 1221 and the fourth clamping portion 1224 .

[0075] In some embodiments, the second clamping groove 1225 penetrates the fourth locking portion 122 in a direction perpendicular to the reference plane P, so that the second clamping portion 1151 passes through the second notch 1228 and enters the second clamping groove 1225. Specifically, the second clamping portion 1151 extends in a direction perpendicular to the reference plane P. When the second measuring rod 120 moves from the folding position to the measuring position, the second clamping portion 1151 passes through the second notch 1228 in a direction parallel to the reference plane P and is inserted into the second clamping groove 1225.

[0076] The third clamping portion 1221 includes a third end 1222 and a fourth end 1223 opposite to each other, wherein the third end 1222 is connected to the second connecting portion 1226, and the fourth end 1223 is a free end. Thus, the elasticity of the third clamping portion 1221 can be increased, making it easier for the third clamping portion 1221 to produce elastic deformation, so that the third clamping portion 1221 and the fourth clamping portion 1224 cooperate to clamp the second clamping portion 1151.

[0077] The third clamping portion 1221 extends from the third end 1222 to the fourth end 1223 along the direction from the third side 1227 to the fourth side 1229. The second clamping slot 1225 is close to the fourth end 1223. It can be understood that the closer the third clamping portion 1221 is to the free end, the easier it is to produce elastic deformation. By making the second clamping slot 1225 close to the fourth end 1223 of the third clamping portion 1221, when the second clamping portion 1151 is inserted into the second clamping slot 1225, the free end of the third clamping portion 1221 can produce a large elastic deformation to avoid the second clamping portion 1151, and after the second clamping portion 1151 is inserted into the second clamping slot 1225, the third clamping portion 1221 cooperates with the fourth clamping portion 1224 to clamp the second clamping portion 1151.

[0078] In other embodiments, the second clamping portion 1151 may be interference fit with the second clamping slot 1225 to lock the third locking portion 115 and the fourth locking portion 122. The third clamping portion 1221 and the fourth clamping portion 1224 may be elastic or inelastic.

[0079] In some embodiments, Figure 3 and Figure 6 As shown, the fourth locking portion 122 and the hinge portion 123 are sequentially distributed along the length direction of the second measuring rod 120, and the third clamping portion 1221 is located between the hinge portion 123 and the fourth clamping portion 1224. Of course, the fourth clamping portion 1224 can be located between the hinge portion 123 and the third clamping portion 1221.

[0080] In some embodiments, Figure 3 As shown, the second measuring rod 120 can be rotatably connected relative to the first measuring rod 110 around the center point O. The fourth locking portion 122 includes a second connecting groove 1230 connected between the second notch 1228 and the second clamping groove 1225, and the second connecting groove 1230 extends along the arc H2, and the center of the arc H2 coincides with the center point O. Therefore, when the second measuring rod 120 rotates from the folding position to the measuring position, the second connecting groove 1230 between the second notch 1228 and the second clamping groove 1225 can avoid the second clamping portion 1151, so that the second clamping portion 1151 smoothly enters the second clamping groove 1225.

[0081] In some embodiments, the fourth locking portion 122 is symmetrically arranged with the second locking portion 121. Specifically, the third clamping portion 1221 of the fourth locking portion 122 is symmetrically arranged with the first clamping portion 1211 of the second locking portion 121, and the fourth clamping portion 1224 of the fourth locking portion 122 is symmetrically arranged with the second clamping portion 1214 of the second locking portion 121. Of course, the fourth locking portion 122 and the second locking portion 121 may also be asymmetrically arranged.

[0082] In some embodiments, the first locking portion 113 and the third locking portion 115 are the same locking portion, thereby simplifying the structure of the first measuring rod 110. Specifically, the first clamping portion 1132 and the second clamping portion 1151 are the same clamping portion. When the second measuring rod 120 is in the folding position, the first clamping portion 1132 is clamped with the second clamping groove 1225; when the second measuring rod 120 is in the measuring position, the first clamping portion 1132 is clamped with the first clamping groove 1215. Of course, the first locking portion 113 and the second locking portion 121 can also be different locking portions.

[0083] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] The above is a detailed introduction to a guide needle measuring device provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A guide needle measuring device, characterized in that: include: A first measuring rod, wherein the first measuring rod is provided with a first scale line extending along a length direction thereof; a second measuring rod, wherein the second measuring rod is provided with a second scale line extending along the length direction thereof, the second measuring rod is movably connected to the first measuring rod, and the second measuring rod can be switched between a measuring position and a folding position relative to the first measuring rod; when the second measuring rod is in the measuring position, the first scale line and the second scale line have the same measuring direction; when the second measuring rod is in the folding position, the second measuring rod and the first measuring rod are at least partially folded in the same length direction; Wherein, the first measuring rod includes a first locking portion, and the second measuring rod includes a second locking portion. When the second measuring rod is in the measuring position, the first locking portion cooperates with the second locking portion to lock the first measuring rod and the second measuring rod.

2. The guide needle measuring device according to claim 1, characterized in that: The second locking portion includes a first locking groove, and the first locking portion includes a first clamping portion. When the second measuring rod is in the measuring position, the first clamping portion is clamped with the first locking groove.

3. The guide needle measuring device according to claim 2, characterized in that: The second measuring rod moves within a reference plane relative to the first measuring rod, and the second locking portion includes a first side edge and a second side edge that are opposite to each other, and the first side edge and the second side edge are distributed on both sides of the second locking portion along a direction parallel to the reference plane; the second locking portion includes a first notch connected to the first card slot, and the first notch is located on the first side edge of the second locking portion, and the first notch is used for the first card portion to be inserted into the first card slot.

4. The guide needle measuring device according to claim 3, characterized in that: The second locking portion includes a first clamping portion and a second clamping portion that are arranged opposite to each other, and a first connecting portion connecting the first clamping portion and the second clamping portion, and the first card slot is formed between the first clamping portion and the second clamping portion; at least one of the first clamping portion and the second clamping portion is elastic; or, the first clamping portion is interference fit with the first card slot.

5. The guide needle measuring device according to claim 4, characterized in that: The first clamping portion passes through the second locking portion in a direction perpendicular to the reference plane; the first clamping portion includes a first end and a second end opposite to each other, the first end is connected to the first connecting portion, and the second end is a free end.

6. The guide needle measuring device according to claim 5, characterized in that: The first clamping portion extends from the first end to the second end along a direction from the first side edge to the second side edge; and the first clamping groove is close to the second end.

7. The guide needle measuring device according to claim 4, characterized in that: The second measuring rod includes a hinged portion, which is rotatably connected to the first measuring rod; the second locking portion and the hinged portion are distributed sequentially along the length direction of the second measuring rod, and the first clamping portion is located between the hinged portion and the second clamping portion; or, the second clamping portion is located between the hinged portion and the first clamping portion.

8. The guide needle measuring device according to claim 3, characterized in that: The second measuring rod can be rotatably connected relative to the first measuring rod around the center point; the second locking portion includes a first connecting groove connected between the first notch and the first clamping groove, the first connecting groove extends along an arc, and the center of the arc coincides with the center point.

9. The guide needle measuring device according to any one of claims 1 to 8, characterized in that: The first measuring rod includes a third locking portion, and the second measuring rod includes a fourth locking portion. When the second measuring rod is in the folded position, the third locking portion cooperates with the fourth locking portion to lock the first measuring rod and the second measuring rod.

10. The guide needle measuring device according to claim 9, characterized in that: The fourth locking portion includes a second locking groove, the third locking portion includes a second clamping portion, and when the second measuring rod is in the folded position, the second clamping portion is clamped with the second locking groove.

11. The guide needle measuring device according to claim 9, characterized in that: The fourth locking portion is symmetrically arranged with respect to the second locking portion.

12. The guide needle measuring device according to claim 9, characterized in that: The first locking portion and the third locking portion are the same locking portion.

13. The guide needle measuring device according to any one of claims 1 to 8, characterized in that: The first measuring rod includes a mating section and a connecting section connected in sequence along its length direction, and one end of the connecting section away from the mating section is movably connected to the second measuring rod; the mating section includes a mating groove extending along the length direction of the first measuring rod, and the mating groove is used for the guide needle to be embedded.

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