A lateral locking mechanism and a weak rock zone strength detector

Abstract

The present invention discloses a side locking mechanism and a soft rock belt strength detector. The side locking mechanism includes a locking lever and a switching lever. One end of the locking lever is provided with a locking hook, and a switching groove is formed in the locking lever; the switching lever is provided with a slider, and the slider is slidably connected to the switching groove. By using the swing of the locking lever, the locking hook can approach or move away from the object to be locked, so that the locking hook approaching the object to be locked can latch the object to be locked from the side to implement locking, and no continuous force needs to be applied by the user's hand after locking; by opening the switching groove and setting the switching lever, and setting the slider on the switching lever, the slider is slidably connected to the switching groove. By using the rotation of the switching lever, the slider is driven to slide between the two ends of the switching groove, driving the locking lever to swing, driving the locking hook to approach or move away from the object to be locked, so that the locking hook is switched between the locking position and the disengaging position, realizing the remote operation, timely response and limit of the specific position of the locking hook, and improving the operation efficiency and accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of locking mechanisms, and particularly to a side locking mechanism and a soft rock zone strength detector. Background Art

[0002] In the field of geotechnical engineering, the use of hand-held tools or devices is often involved. Some hand-held tools or devices are provided with mechanisms that convert elastic potential energy into kinetic energy. This part of the mechanism usually requires the user to apply pressure with the hand to compress the elastic member, accumulate elastic potential energy in the elastic member, and then remove the hand pressure to convert the accumulated elastic potential energy into kinetic energy. The conversion efficiency is high and it is convenient to use. However, such hand-held tools or devices still have the following problems:

[0003] When applying pressure with the hand, in order to maintain the accumulation of elastic potential energy, the hand cannot leave the pressure-applying mechanism, and the person applying the force has been in a state of applying force, seriously consuming manpower; the entire tool or device may also have other functions and components that need to be operated, but since the hand cannot leave the pressure-applying mechanism, the operation of other components cannot be implemented, and other functions cannot be enabled smoothly. Summary of the Invention

[0004] The purpose of the present invention is to provide a side locking mechanism and a soft rock zone strength detector, which can perform side locking on the mechanism that converts elastic potential energy into kinetic energy in the existing hand-held tools or devices, so that the elastic member remains in a compressed state, and solve the technical problem that requires the user to continuously apply force with the hand.

[0005] The present invention is achieved by the following technical solutions:

[0006] A side locking mechanism includes: a locking lever, the locking lever is pivotally connected to the external environment shaft through a first shaft, one end of the locking lever is provided with a locking hook, the locking hook is used for hooking with the object to be locked to lock the object to be locked, the locking lever is provided with a switching groove, and the switching groove extends along the length direction of the locking lever; a switching rod, the switching rod is pivotally connected to the external environment shaft through a second shaft, the second shaft is arranged parallel to the first shaft, the switching rod is provided with a slider, the slider is slidably connected to the switching groove, and when the slider is respectively located at both ends of the switching groove, the locking hook is respectively located at the locking position and the disengaging position.

[0007] Optionally, the first shaft is located in the middle of the locking lever, the switching groove is opened at one end of the locking lever away from the locking hook, and the ratio of the distance between the first shaft and the locking hook to the length of the locking lever is 1:(3 - 4).

[0008] Optionally, the second shaft and the slider are respectively arranged at both ends of the switching rod.

[0009] Optionally, the included angle between the switching rod and the locking lever is α, 0<α<180°.

[0010] Optionally, the switching rod is provided with a trigger connected to one end of the second shaft, and pressing the trigger can switch the locking hook from the locking position to the disengaging position.

[0011] Optionally, the switching rod is connected to a return spring, the other end of the return spring is connected to the external environment, and the return spring is used to place the locking hook in a locking position.

[0012] A weak rock belt strength detector comprises: a shell, a launch cavity is opened in the shell, a launch block is slidably connected in the launch cavity, and the launch block is connected to the inner wall of the shell through an elastic member; a pull rod, one end of the pull rod is connected to the launch block, and the other end passes through the shell and slides with the shell, the pull rod is used to compress the elastic member so that the launch block can be launched along the launch cavity; a probe pin, the probe pin is detachably connected to the launch block, and the probe pin is used to penetrate the weak rock belt to be tested; any one of the above-mentioned side locking mechanisms, wherein the external environment is the shell, the locking hook is used to engage with the end face of the launch block to lock the launch block, and when the launch block is locked, the elastic member is in a compressed state.

[0013] Optionally, one end of the ejection block is connected to a locking cylinder, the inner diameter of the locking cylinder is slightly larger than the diameter of the probe pin, and the end surface of one end of the locking cylinder is provided with a plurality of compensation seams along the axial direction of the locking cylinder so that the end surface of the locking cylinder is divided into a plurality of locking blocks; a locking ring is provided on the outer sleeve of the locking cylinder, and the locking ring is used to squeeze a plurality of the locking blocks so that the locking blocks bend inward along the radial direction of the locking cylinder.

[0014] Optionally, the outer wall of the locking cylinder is provided with an external thread, the locking ring includes a connecting portion and an extrusion portion arranged along the axial direction, the inner wall of the connecting portion is provided with an internal thread, the inner wall of the extrusion portion is set as a conical surface, and the end face of the locking block is a wedge-shaped surface.

[0015] Optionally, the side wall of the ejection block close to the end face of the elastic member is set as a conical surface, and the side of the locking hook away from the elastic member is set as an inclined surface. The conical surface of the elastic member can squeeze the inclined surface of the locking hook so that the locking hook passes over the ejection block and engages with the other end face of the ejection block.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] A side locking mechanism provided by the present invention is provided with a locking lever, and a locking hook is arranged at one end thereof. By using the swing of the locking lever, the locking hook can approach or move away from the object to be locked from the side, and the locking hook approaching the object to be locked can latch the object to be locked from the side, so as to lock the object to be locked. After locking, there is no need for the user to continue applying force with the hand; on this basis, a switching groove is opened on the locking lever, a switching rod is arranged, and a slider is arranged on the switching rod, and the slider is slidably connected with the switching groove. Since the switching rod is pivotally connected to the external environment shaft through the second shaft, it can only rotate along the second shaft. By using its rotation, the slider is driven to slide between the two ends of the switching groove, driving the locking lever to swing, driving the locking hook to approach or move away from the object to be locked, so that the locking hook is switched between the locking position and the disengaging position, realizing the remote operation, timely response and limit of a specific position of the locking hook, and improving the operation efficiency and accuracy.

[0018] A soft rock belt strength detector provided by the present invention is provided with a housing, an ejection cavity is opened in the housing, an ejection block is slidably arranged in the ejection cavity, and the ejection block is connected with the inner wall of the housing through an elastic member. On this basis, a pull rod is arranged, and the elastic member is compressed by pulling the ejection block by the pull rod to store elastic potential energy for the elastic member. After the pull rod is released, the elastic potential energy of the elastic member is converted into the kinetic energy of the ejection block, so that the ejection block ejects along the ejection cavity. On this basis, a probe nail is connected to the ejection block, and the ejected ejection block drives the probe nail to move quickly, so that the probe nail penetrates into the soft rock belt to be detected. Then, the strength of the soft rock belt to be detected can be calculated according to the penetration depth of the probe nail. By arranging the above-mentioned side locking mechanism, the ejection block is locked from the side, and when locked, the elastic member is in a compressed state, and in this state, the pulling of the hand on the pull rod can be removed; the detector has a simple structure, is small in size, and can directly act on the soft rock belt to be detected, effectively solving the problems of existing detection instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the side locking mechanism provided by the present invention;

[0021] Figure 2 It is a side sectional view of the soft rock belt strength detector provided by the present invention in a compressed state;

[0022] Figure 3 It is a side sectional view of the soft rock belt strength detector provided by the present invention in an ejection state;

[0023] Figure 4 It is an exploded view of the connection between the locking cylinder and the locking ring of the soft rock belt strength detector provided by the present invention;

[0024] Figure 5 The front view of the locking cylinder of the soft rock belt strength detector provided by the present invention;

[0025] Figure 6 The partial enlarged view of the locking lever of the soft rock belt strength detector provided by the present invention.

[0026] The reference signs in the drawings and the corresponding names of the components:

[0027] 10 - housing; 101 - second groove; 11 - ejection cavity; 12 - ejection block; 121 - first groove; 13 - elastic member; 14 - probe nail; 15 - pull rod; 151 - pull ring; 20 - locking cylinder; 201 - compensation seam; 202 - locking block; 21 - locking ring; 211 - connecting portion; 212 - extrusion portion; 30 - locking lever; 301 - locking hook; 302 - switching groove; 31 - switching rod; 311 - slider; 32 - return spring; 33 - trigger; 40 - first shaft; 41 - second shaft. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0029] Please refer to Figure 1 , an embodiment of the present invention provides a side locking mechanism, including: a locking lever 30, the locking lever 30 is pivotally connected to the external environment through a first shaft 40, a locking hook 301 is provided at one end of the locking lever 30, and the locking hook 301 is used for engaging with an object to be locked so as to lock the object to be locked. A switching groove 302 is formed in the locking lever 30, and the switching groove 302 extends along the length direction of the locking lever 30; Secondly, a switching rod 31 is included, the switching rod 31 is pivotally connected to the external environment through a second shaft 41, the second shaft 41 is arranged parallel to the first shaft 40, a slider 311 is provided on the switching rod 31, the slider 311 is slidably connected to the switching groove 302, and when the slider 311 is respectively located at both ends of the switching groove 302, the locking hook 301 is respectively located at the locking position and the disengaging position.

[0030] The side locking mechanism provided in this embodiment is provided with a locking lever 30, and a locking hook 301 is arranged at one end thereof. By using the swing of the locking lever 30, the locking hook 301 can approach or move away from the object to be locked from the side, and the locking hook 301 approaching the object to be locked can latch the object to be locked from the side, so as to lock the object to be locked, and no continuous force needs to be applied by the user's hand after locking; on this basis, a switching groove 302 is opened in the locking lever 30, and a switching lever 31 is arranged. A slider 311 is arranged on the switching lever 31, and the slider 311 is slidably connected with the switching groove 302. Since the switching lever 31 is pivotally connected to the external environment through the second shaft 41, it can only rotate along the second shaft 41. By using its rotation, the slider 311 is driven to slide between the two ends of the switching groove 302, driving the locking lever 30 to swing, and driving the locking hook 301 to approach or move away from the object to be locked, so that the locking hook 301 is switched between the locking position and the disengaging position, realizing the remote operation, timely response and limit at a specific position of the locking hook 301, and improving the operation efficiency and accuracy.

[0031] It should be noted that the reason for setting the first shaft 40 and the second shaft to be parallel is that by setting them parallel, the rotation planes of the locking lever 30 and the switching lever 31 are parallel, thus avoiding the situation of rotation jamming or wasting the rotation distance.

[0032] It should be noted that the above-mentioned external environment refers to the device or tool carrying this side locking mechanism. It only needs to fix this side locking mechanism to the device or tool by using the first shaft 40 and the second shaft 41, and when the locking hook 301 is in the locking position, it can be latched and positioned with the object to be locked (the object bearing kinetic energy).

[0033] In order to make full use of the length of the locking lever 30 and make the force transmission more reasonable, the first shaft 40 is located in the middle of the locking lever 30, and the switching groove 302 is opened at one end of the locking lever 30 away from the locking hook 301.

[0034] Through the above settings, on the one hand, the thrust required for the switching lever 31 to push the locking lever 30 through the slider 311 is minimized, and the swing angle of the locking lever 30 is minimized, making the switching process between the locking position and the disengaging position smoother.

[0035] Preferably, the ratio of the distance between the first shaft 40 and the locking hook 301 to the length of the locking lever 30 is 1:(3 - 4).

[0036] Through the above limitation, the switching distance of the locking hook 301 between the locking position and the disengaging position is further reduced to improve the response speed.

[0037] Optionally, in order to make full use of the length of the switching lever 31, the second shaft 41 and the slider 311 are respectively arranged at both ends of the switching lever 31.

[0038] Preferably, the included angle between the switching lever 31 and the locking lever 30 is α, where 0 < α < 180°.

[0039] Through the above limitation, it is avoided that the included angle between the switching lever 31 and the locking lever 30 is 0° or 180°. When the included angle between the two is 0° or 180°, the switching lever 31 can drive the locking lever 30 to swing when rotating along two directions with the second shaft 41 as the axis, which is not conducive to precise control and reset.

[0040] Further preferably, the included angle between the switching lever 31 and the locking lever 30 is an acute angle.

[0041] Through the above setting, on the premise of ensuring the swing angle of the locking lever 30, the rotation angle of the switching lever 31 can be effectively shortened.

[0042] In order to rotate the switching lever 31 more conveniently, a trigger 33 is connected to one end of the switching lever 31 where the second shaft 41 is provided. By pressing the trigger 33, the locking hook 301 can be switched from the locking position to the disengaged position.

[0043] In order to realize the automatic reset of the locking hook 301, a return spring 32 is connected to the switching lever 31. The other end of the return spring 32 is connected to the external environment. The return spring 32 is used to make the locking hook 301 located at the locking position.

[0044] It should be noted in advance that in the field of geotechnical engineering, soft rock zones are unfavorable rock masses in engineering construction, and targeted engineering treatment measures need to be adopted. The basis for the selection of targeted engineering treatment measures is the strength parameters of the soft rock zones. Therefore, it is very important to obtain the strength parameters of the soft rock zones. The existing methods for determining the strength of soft rock zones mainly use geotechnical mechanics tests. However, geotechnical mechanics tests not only have problems such as complex operation procedures, high costs, long test cycles, and only being able to select typical specimens for testing, but also the detection instruments used generally have problems such as complex structures, large volumes, and difficult transportation.

[0045] Please refer to Figures 2 to 6In order to solve the above problems, the embodiment of the present invention further provides a weak rock belt strength detector, comprising: a shell 10, wherein an ejection cavity 11 is opened in the shell 10, and the ejection cavity 11 is a linear cavity, wherein an ejection block 12 is slidably connected in the ejection cavity 11, and the ejection block 12 is connected to the inner wall of the shell 10 through an elastic member 13; a second pull rod 15, wherein one end of the pull rod 15 is connected to the ejection block 12, and the other end passes through the shell 10 and slidably cooperates with the shell 10, and the pull rod 15 is pulled outward to drive the ejection block 12 to move along the ejection cavity 11, and during the process, the ejection block 12 compresses the ejection block 12. The elastic member 13, after the pulling force applied to the pull rod 15 is removed, the ejection block 12 can be ejected along the ejection cavity 11; the third includes a probe nail 14, the probe nail 14 is detachably connected to the ejection block 12, the axial direction of the probe nail 14 is parallel to the length direction of the ejection cavity 11, and the probe nail 14 is used to penetrate the weak rock zone to be tested; the fourth includes any one of the above-mentioned lateral locking mechanisms, the external environment is the shell 10, the locking hook 301 is used to engage with the end face of the ejection block 12 to lock the ejection block 12, and when the ejection block 12 is locked, the elastic member 13 is in a compressed state.

[0046] By setting a shell 10, an ejection cavity 11 is opened in the shell 10, an ejection block 12 is slidably set in the ejection cavity 11, and the ejection block 12 is connected to the inner wall of the shell 10 through an elastic member 13, so that the ejection block 12 can slide along the ejection cavity 11. On this basis, a pull rod 15 is set, and the elastic member 13 is squeezed by the pull rod 15 to pull the ejection block 12, so that elastic potential energy is accumulated for the elastic member 13. After the pull rod 15 is released, the elastic potential energy of the elastic member 13 is converted into the kinetic energy of the ejection block 12, so that the ejection block 12 is ejected along the ejection cavity 11. On this basis, the ejection block 12 is connected to the probe pin 14, and the ejected ejection block 12 drives the probe pin 14 to move quickly, so that the probe pin 14 extends out of the shell 10 and penetrates into the weak rock zone to be detected, and then the strength of the weak rock zone to be detected can be calculated according to the penetration depth of the probe pin 14; by setting the above-mentioned lateral locking mechanism, the ejection block 12 is locked from the side direction, and when locked, the elastic member 13 is in a compressed state, and the hand pulling the pull rod 15 can be removed in this state; the detector has a simple structure and a small size, and can directly act on the weak rock zone to be detected, effectively solving the problems of existing detection instruments.

[0047] It should be noted that, in the present embodiment, the shell 10 is cylindrical in shape, and the length direction of the ejection cavity 11 is parallel to the axial direction of the shell 10 . Shells of other shapes may also be used in other embodiments.

[0048] It should be noted that the elastic member 13 can be selected from any elastic member in the prior art as long as it can accumulate elastic potential energy when compressed in real time, such as an elastic metal sheet, a spring, a hydraulic telescopic rod, a rubber block, etc.

[0049] To make the ejection process of the ejection block 12 relatively stable, the ejection cavity 11 is a cylindrical cavity, the ejection block 12 is a cylindrical block, and the diameter of the ejection block 12 matches the diameter of the ejection cavity 11.

[0050] By setting the ejection block 12 as a cylindrical block, the force conditions at each point on its side wall are in an equilibrium state. On this basis, by setting the diameter of the ejection block 12 to match the diameter of the ejection cavity 11, radial shaking of the ejection block 12 will not occur during the ejection process, so that the probe nail 14 can be stably ejected along its own axis.

[0051] To further explain the specific structure of the detachable connection between the probe nail 14 and the ejection block 12, one end of the ejection block 12 is connected with a locking cylinder 20. The inner diameter of the locking cylinder 20 is slightly larger than the diameter of the probe nail 14. A plurality of compensation slits 201 are axially formed in the end face of one end of the locking cylinder 20, so that the end face of the locking cylinder 20 is divided into a plurality of locking blocks 202; a locking ring 21 is sleeved outside the locking cylinder 20, and the locking ring 21 is used to squeeze the plurality of locking blocks 202, so that the locking blocks 202 bend inward along the radial direction of the locking cylinder 20.

[0052] By setting the locking cylinder 20 with its inner diameter slightly larger than the diameter of the probe nail 14, the root of the probe nail 14 is inserted into the locking cylinder 20, and the locking cylinder 20 is used to perform preliminary radial limit on the probe nail 14; on this basis, by setting a plurality of compensation slits 201, the end of the locking cylinder 20 away from the ejection block 12 is divided into a plurality of locking blocks 202. On this basis, a locking ring 21 is set so that it can be sleeved outside the plurality of locking blocks 202, hoop the plurality of locking blocks 202, and exert extrusion on the plurality of locking blocks 202, so that the locking blocks 202 bend inward along the radial direction of the locking cylinder 20. The inwardly bent plurality of locking blocks 202 wrap the root of the probe nail 14 and apply pressure to the root of the probe nail 14 to tightly clamp the probe nail 14. When the probe nail 14 needs to be disassembled, only the locking ring 21 needs to be removed, and the plurality of locking blocks 202 can be reset, and then the probe nail 14 can be taken out.

[0053] It should be noted that the material of the locking cylinder 20 can be selected from any one of the existing elastic metals, alloys, plastics, etc. in the prior art, as long as it can return to its original state after being bent under pressure.

[0054] To specifically explain the way the locking ring 21 squeezes the locking blocks 202, an external thread is provided on the outer wall of the locking cylinder 20. The locking ring 21 includes a connecting portion 211 and an extrusion portion 212 arranged axially. An internal thread is provided on the inner wall of the connecting portion 211, the inner wall of the extrusion portion 212 is a conical surface, and the end face of the locking block 202 is a wedge-shaped surface.

[0055] Through the above arrangement, after the probe pin 14 is inserted into the locking cylinder 20, the locking ring 21 is screwed with the external thread of the locking cylinder 20 through the internal thread of the connecting portion 211. During the process, the conical surface of the extrusion portion 212 contacts and squeezes the wedge surface of the locking block 202, thereby generating a radial component of force on the wedge surface, causing the locking block 202 to bend radially inward.

[0056] Preferably, the elastic member 13 is a spring, and the elastic member 13 is sleeved outside the pull rod 15 . One end of the elastic member 13 abuts against the end surface of the ejection block 12 , and the other end abuts against the inner wall of the housing 10 .

[0057] By setting the elastic member 13 as a spring, it can be sleeved outside the pull rod 15, and the elastic member 13 can be evenly squeezed when the pull rod 15 is pulled, thereby avoiding unnecessary bending of the pull rod 15 or unnecessary skewing of the ejection block 12.

[0058] In order to stably fix the elastic member 13, the ejection block 12 has a first embedding groove 121 at one end close to the elastic member 13, and the inner wall of the shell 10 has a second embedding groove 101. Both ends of the elastic member 13 are respectively embedded in the first embedding groove 121 and the second embedding groove 101.

[0059] The two ends of the elastic member 13 are fixed by embedding to prevent the elastic member 13 from shaking unnecessarily.

[0060] In order to further improve automation, the side wall of the ejection block 12 close to the end face of the elastic member 13 is set as a conical surface, and the side of the locking hook 301 away from the elastic member 13 is set as an inclined surface. The conical surface of the elastic member 13 can squeeze the inclined surface of the locking hook 301 so that the locking hook 301 passes over the ejection block 12 and is engaged with the other end face of the ejection block 12.

[0061] Through the above arrangement, when the pull rod 15 is pulled to drive the ejection block 12 to move along the ejection cavity 11, the conical surface of the ejection block 12 contacts the inclined surface of the locking hook 301, and the ejection block 12 is further pulled to squeeze the conical surface against the inclined surface, so that the locking hook 301 drives the switching rod 31 to rotate, and the reset spring 32 is stretched during the process. When the ejection block 12 passes the locking hook 301, the reset spring 32 is reset, driving the switching rod 31 to rotate, and driving the locking hook 301 to reset to the locking position, and the locking hook 301 can lock the ejection block 12.

[0062] Preferably, one end of the pull rod 15 located outside the housing 10 is connected to a pull ring 151, and the pull ring 151 is used for passing a finger.

[0063] The specific embodiments described above further elaborate on the objective, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A strength detector for weak rock zones, characterized in that, Comprising: A housing, within which an ejection chamber is formed. An ejection block is slidably connected within the ejection chamber, and the ejection block is connected to the inner wall of the housing through an elastic member. A pull rod, one end of which is connected to the ejection block and the other end penetrates through the housing and is slidably engaged with the housing. The pull rod is used to compress the elastic member so that the ejection block can be ejected along the ejection chamber. A probe nail, which is detachably connected to the ejection block and is used to penetrate into the soft rock zone to be measured. A side locking mechanism, comprising: A locking lever, which is pivotally connected to the housing through a first shaft. One end of the locking lever is provided with a locking hook, which is used to engage with the end face of the ejection block to lock the ejection block. When the ejection block is locked, the elastic member is in a compressed state. A switching groove is formed in the locking lever and extends along the length direction of the locking lever. A switching rod, which is pivotally connected to the housing through a second shaft. The second shaft is arranged parallel to the first shaft. The switching rod is provided with a slider, which is slidably connected to the switching groove. When the slider is located at both ends of the switching groove respectively, the locking hook is located at the locking position and the disengaging position respectively. One end of the ejection block is connected with a locking cylinder. The inner diameter of the locking cylinder is slightly larger than the diameter of the probe nail. A plurality of compensation slits are formed in the end face of one end of the locking cylinder along the axial direction of the locking cylinder, so that the end face of the locking cylinder is divided into a plurality of locking blocks. A locking ring is sleeved outside the locking cylinder, and the locking ring is used to squeeze a plurality of the locking blocks so that the locking blocks bend inwards along the radial direction of the locking cylinder. The side wall of the end face of the ejection block close to the elastic member is set as a conical surface, and the side of the locking hook far from the elastic member is set as an inclined surface. The conical surface of the elastic member can squeeze the inclined surface of the locking hook so that the locking hook can cross over the ejection block and engage with the other end face of the ejection block. A first embedding groove is formed at one end of the ejection block close to the elastic member, and a second embedding groove is formed in the inner wall of the housing. Both ends of the elastic member are respectively embedded in the first embedding groove and the second embedding groove.

2. The strength detector for weak rock bands according to claim 1, wherein The first shaft is located in the middle of the locking lever, and the switching groove is formed at one end of the locking lever far from the locking hook. The ratio of the distance between the first shaft and the locking hook to the length of the locking lever is 1:(3 - 4).

3. The weak rock zone strength detector according to claim 1 or 2, characterized in that, The second shaft and the slider are respectively arranged at both ends of the switching rod.

4. The strength detector for weak rock bands according to claim 1, characterized in that, The included angle between the switching rod and the locking lever is α, 0 < α < 180°.

5. The strength detector for weak rock zones according to claim 3, characterized in that, One end of the switching rod where the second shaft is arranged is connected with a trigger. Pressing the trigger can switch the locking hook from the locking position to the disengaging position.

6. The strength detector for weak rock zones according to claim 5, characterized in that, The switching rod is connected with a return spring, and the other end of the return spring is connected with the housing. The return spring is used to make the locking hook located at the locking position.

7. The strength detector for weak rock zones according to claim 1, characterized in that, External threads are formed on the outer wall of the locking cylinder. The locking ring includes a connecting portion and an extrusion portion arranged along the axial direction. Internal threads are formed in the inner wall of the connecting portion, and the inner wall of the extrusion portion is set as a conical surface. The end face of the locking block is a wedge-shaped surface.

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