A pry detection alarm tool

Abstract

The utility model provides a kind of pry detection alarm tool, including handle, crowbar and tension spring, handle one end is provided with mounting bracket, the other end is provided with holding part;Crowbar is hinged on the mounting bracket of handle, the first section of crowbar is located outside the mounting bracket of handle, the second section of crowbar is located between the mounting bracket of handle and holding part;Tension spring is connected between handle and crowbar, one end of tension spring is located between the mounting bracket of handle and holding part, the other end is located on the second section of crowbar.The utility model passes through lever principle, when the pressure on handle is more than the upper limit of tension of tension spring, displacement of crowbar tail portion occurs and leaves the slot of sensor, make sensor signal transmission to alarm circuit board and carry out sound and light alarm, indicate that the welding tension of this position meets the upper limit of set tension, solve the subjective error of manual pry detection operation, reduce over-check risk while guaranteeing detection reliability.

Description

Technical Field

[0001] This utility model relates to the field of welding inspection technology, and in particular to a pry-and-detection alarm fixture. Background Technology

[0002] In the battery pack module manufacturing process, the welding quality of the cells and busbars directly affects the safety and reliability of the battery. To ensure that there are no defects in the welding, the industry generally adopts manual pry inspection technology: the operator inserts a pry bar tool under the busbar and applies force manually by pressing down to observe whether the welding point separates. This method relies on the lever principle. Although it is simple to operate, it has significant drawbacks: the force applied manually is affected by the operator's experience and physical strength, and the pry force fluctuates greatly, leading to uncontrolled force; excessive force can easily damage qualified welding points (i.e., "over-inspection phenomenon"), thus causing the risk of over-inspection and product rejection; there is no real-time feedback: there is a lack of force threshold monitoring and alarm mechanism, and defects can only be discovered afterward.

[0003] The aforementioned defects lead to increased production costs, decreased product consistency, and even safety hazards. Therefore, there is an urgent need for an intelligent pry-and-grab tool that can quantify the upper limit of applied force and provide real-time alarms to improve detection accuracy and efficiency. Utility Model Content

[0004] This utility model provides a pry-inspection alarm tool to solve the technical problem that uncontrollable pry-inspection force leads to over-inspection and damage to the qualified pry-inspection area.

[0005] This utility model provides a pry-detection alarm fixture, including a handle, a pry bar, and a tension spring. One end of the handle is provided with a mounting bracket, and the other end is provided with a grip. The pry bar is hinged to the mounting bracket of the handle, with the first section of the pry bar located outside the mounting bracket of the handle and the second section of the pry bar located between the mounting bracket of the handle and the grip. The tension spring is connected between the handle and the pry bar, with one end of the tension spring located between the mounting bracket of the handle and the grip, and the other end located on the second section of the pry bar.

[0006] In one embodiment of this utility model, a sensor and an alarm circuit board are provided on the handle. After the sensor detects that the displacement of the second section of the pry bar meets the set value, the alarm circuit board emits an audible and visual indication.

[0007] In one embodiment of the present invention, the grip part has a grip area on the top side of the handle, and an alarm circuit board is installed inside the handle corresponding to the grip area, and the grip area is made of a light-transmitting material.

[0008] In one embodiment of the present invention, a slot for accommodating the second section of the pry bar is provided on the top side of the handle, and a sensor is installed in the slot.

[0009] In one embodiment of the present invention, the second section of the pry bar is provided with a tail, and the second end of the pry bar extends into the slot through the tail.

[0010] In one embodiment of the present invention, a connecting hole is provided on the second section of the pry bar, and at least two connecting holes are arranged along the length direction of the second section of the pry bar. The pry bar is connected to the tension spring through the connecting hole of its second section.

[0011] In one embodiment of the present invention, the end of the first section of the pry bar is provided with a flat opening.

[0012] In one embodiment of the present invention, the flat opening of the first section of the pry bar is close to the plane of the bottom side of the handle, and the second section of the pry bar is connected to the top side of the handle by a tension spring.

[0013] In one embodiment of this utility model, the first and second segments of the pry bar are not axially aligned.

[0014] In one embodiment of this utility model, a tension spring is detachably installed between the handle and the pry bar, and tension springs with different tension properties are installed to adapt to the force required for prying and inspection by the pry bar.

[0015] The beneficial effects of this utility model are as follows: The pry-inspection alarm fixture proposed in this utility model uses the lever principle to select different tension springs to set different pry-inspection forces at the front of the pry bar. The connection hole position of the tension spring on the pry bar is adjusted to change the lever arm length. The two work together to achieve a wide range of pry-inspection force threshold coverage. When the downward pressure on the handle exceeds the upper limit of the tension spring, the tail of the pry bar is displaced and leaves the sensor slot, causing the sensor to transmit a signal to the alarm circuit board to trigger an audible and visual alarm, indicating that the welding tension at this position meets the set upper limit of the tension. This solves the subjective error of manual pry-inspection operation and reduces the risk of over-inspection while ensuring the reliability of the detection. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the structure of a pry-detection alarm tool provided in an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of the pry-detection alarm tool provided in one embodiment of the present invention.

[0020] The attached figures are labeled as follows:

[0021] 10. Handle; 11. Mounting bracket; 12. Grip part; 120. Grip area; 13. Slot; 20. Pry bar; 21. First section; 22. Second section; 23. Tail end; 24. Connecting hole; 30. Tension spring; 40. Sensor; 50. Alarm circuit board. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0025] Please see Figures 1 to 2 , Figure 1 A pry-detection alarm fixture provided in one embodiment of the present invention includes a handle 10, a pry bar 20, and a tension spring 30. One end of the handle 10 is provided with a mounting bracket 11, and the other end is provided with a grip portion 12. The pry bar 20 is hinged to the mounting bracket 11 of the handle 10. The first segment 21 of the pry bar 20 is located outside the mounting bracket 11 of the handle 10, and the second segment 22 of the pry bar 20 is located between the mounting bracket 11 and the grip portion 12 of the handle 10. The tension spring 30 is connected between the handle 10 and the pry bar 20. One end of the tension spring 30 is located between the mounting bracket 11 and the grip portion 12 of the handle 10, and the other end is located on the second segment 22 of the pry bar 20.

[0026] Specifically, in this embodiment of the invention, the structure of the pry-detection alarm fixture is based on a handle 10, a pry bar 20, and a tension spring 30. The handle 10 serves as the operating body, with one end equipped with a mounting bracket 11 for supporting mechanical connections, and the other end extending into a gripping portion 12 for easy manual force application, forming a stable force transmission base. The pry bar 20 is hinged to the mounting bracket 11 of the handle 10 via corresponding mounting holes; this pivotal connection ensures the freedom of the pry bar 20 to perform lever movements. The pry bar 20 is divided into two distinct sections: the first section 21 extends to the outside of the mounting bracket 11 for insertion below the battery busbar and application of detection force; the second section 22 is located in the space between the mounting bracket 11 and the gripping portion 12 of the handle 10, serving as the force transmission part in the lever system.

[0027] Furthermore, the tension spring 30 serves as a force control element, with its two ends anchored to the handle 10 and the second segment 22 of the lever 20, respectively. Specifically, one end of the tension spring 30 is fixed to a pre-defined connection point between the mounting bracket 11 of the handle 10 and the grip 12, while the other end directly acts on the force-bearing position of the second segment 22 of the lever 20. This arrangement ensures that the tension spring 30 is always in a stretched state. When the handle 10 is pressed down, the spring tension forms a resistance constraint on the first segment 21 of the lever 20 through the second segment 22. The tensile deformation of the tension spring 30 is directly related to the displacement of the lever 20, thereby establishing a precise force threshold control mechanism.

[0028] Thus, the handle 10 grip 12 serves as the operating area, the mounting bracket 11 as the hinge area, the first section 21 of the pry bar 20 as the execution area, and the second section 22 and the spring constitute the force control feedback area. The positional relationship of each component follows the lever principle. The downward pressure of the handle 10 is converted into the detection force of the first section 21 of the pry bar 20 on the welding point through the fulcrum of the mounting bracket 11, while the second section 22 forms a balance constraint through the spring tension. When the detection force exceeds a preset threshold, the force on the second section 22 of the pry bar 20 will exceed the constraint force of the tension spring 30, resulting in additional displacement. By observing the additional displacement of the second section 22 of the pry bar 20, it is determined that the prying force is too large, thereby controlling the degree of force applied during the prying process and protecting the prying position from damage.

[0029] Please see the appendix Figure 2 In one embodiment, the handle 10 is provided with a sensor 40 and an alarm circuit board 50. After the sensor 40 detects that the displacement of the second segment 22 of the pry bar 20 meets the set value, the alarm circuit board 50 emits an audible and visual indication.

[0030] Specifically, in this embodiment of the invention, a sensor 40 and an alarm circuit board 50 system are integrated on the handle 10 to form a core module for displacement detection and feedback. The sensor 40 is fixedly installed at a preset position inside the handle 10, and its detection end is precisely aligned with the end of the movement trajectory of the second segment 22 of the pry bar 20. For example, the displacement state of the pry bar 20 can be captured in real time through a physical slot structure. When the downward pressure of the handle 10 exceeds the tension threshold set by the spring, the second segment 22 of the pry bar 20 deflects under the action of the lever, and the tail 23 of the pry bar 20, which was originally embedded in the slot of the sensor 40, disengages. This displacement change is recognized by the sensor 40 as a valid trigger signal. The signal transmission path of the sensor 40 is directly connected to the internal processing unit of the alarm circuit board 50 to ensure the real-time detection response.

[0031] Furthermore, the alarm circuit board 50 is compactly integrated into the internal space of the handle 10, and forms a closed-loop feedback system with the sensor 40 via circuit connection. Upon receiving a displacement trigger signal from the sensor 40, the internal logic of the circuit board immediately drives the audible and visual indication module: the buzzer emits a continuous warning sound, while the onboard LED indicator lights up a bright red light, forming a dual audible and visual alarm indication. This indication mode eliminates the need for operator observation or judgment, clearly indicating that the current solder joint has withstood a prying force exceeding a preset threshold, and that the soldering strength meets the set standards.

[0032] In other words, the mechanical action of the second section 22 of the pry bar 20 disengaging from the slot of the sensor 40, to the generation of an electrical signal by the alarm circuit board 50 to drive the audio-visual device, is completed instantaneously. The alarm state is maintained until the operator releases the handle 10, at which point the tension spring 30 resets, causing the second section 22 of the pry bar 20 to return to its original position, the slot of the sensor 40 to close again, and the system returns to the detection state. Through this mechanism, the tooling transforms mechanical events into intuitive audio-visual commands, replacing the subjective judgment of traditional manual inspection.

[0033] Please see the appendix Figure 1 and Figure 2 In one embodiment, the grip portion 12 is provided with a grip area 120 on the top side of the handle 10, and an alarm circuit board 50 is installed inside the handle 10 corresponding to the grip area 120, and the grip area 120 is made of a light-transmitting material.

[0034] Specifically, in this embodiment of the invention, the top side of the handle 10 is provided with a specially optimized grip area 120, the contour of which can be shaped according to ergonomic principles to ensure that the operator's hand conforms to the curvature when applying force, thereby improving the stability and comfort of operation. The grip area 120 can be integrally injection molded from high-transmittance engineering plastic, allowing light to penetrate evenly without scattering distortion. Inside the handle 10 cavity directly below the grip area 120, the alarm circuit board 50 is fixedly installed in an embedded structure, with its onboard LED indicator array facing the bottom of the light-transmitting material, forming an unobstructed direct light path.

[0035] When the alarm circuit board 50 is triggered, the high-brightness light emitted by the LED penetrates directly through the light-transmitting material of the grip area 120, forming a conspicuous visual signal in the area covered by the operator's palm. The operator can simultaneously obtain the alarm status simply by sensing the change in light from the grip position without removing their palm or changing their grip posture.

[0036] In this way, through the penetrating transmission of light signals, the mechanical detection results are transformed into intuitive visual feedback, forming a closed-loop interaction. This avoids the noise interference in the working environment during use from masking the alarm sound, ensuring that the operator accurately obtains the alarm information corresponding to the applied force.

[0037] In one embodiment, the top side of the handle 10 has a slot 13 for accommodating the second section 22 of the pry bar 20, and a sensor 40 is installed in the slot 13.

[0038] Specifically, in this embodiment of the present invention, a slot 13 structure is provided on the top side of the handle 10, which allows the trajectory of the slot 13 to coincide with the movement path of the second segment 22 of the pry bar 20. When the tooling is in the initial inspection state, the end of the second segment 22 of the pry bar 20 is exactly located in the slot 13, and the position state of the second segment 22 of the pry bar 20 is identified by the sensor 40 arranged in the slot 13.

[0039] In other words, the sensor probe of the sensor 40 in the slot 13 is directly facing the end of the second section 22 of the pry bar 20. When the downward pressure of the handle 10 is transmitted to the pry bar 20 and exceeds the spring threshold, the second section 22 of the pry bar 20 forms a deflection displacement relative to the slot 13. The end that was originally in contact with the sensor probe of the sensor 40 is removed from the effective sensing distance. This displacement change is captured in real time as an electrical signal jump. After the signal is generated, it is transmitted to the alarm circuit board 50 in the grip area 120, thereby triggering an audible and visual alarm. The entire process is synchronously responded at the moment the pry bar 20 completes its displacement.

[0040] Please see the appendix Figure 1 and Figure 2 In one embodiment, the second section 22 of the pry bar 20 is provided with a tail 23, and the second end of the pry bar 20 extends into the slot 13 through the tail 23.

[0041] Specifically, in this embodiment of the invention, the second segment 22 of the pry bar 20 is provided with a dedicated tail 23 structure at its end. The tail 23 has a cylindrical or square cross-section and is seamlessly welded or machined to the body of the second segment 22 to ensure the continuity and strength of the force transmission. The tail 23 serves as the terminal execution point of the pry bar 20's movement trajectory and, in its initial assembled state, extends into the slot 13 on the top side of the handle 10. The dimensions of the slot 13 match the cross-section of the tail 23, forming a clearance fit guide—the insertion depth of the tail 23 is constrained within a preset range by the slot 13, providing both initial positioning stability and allowing deflection along the hinge axis of the pry bar 20 when force is applied. Through the lever geometry formed by the pry bar 20, the tail 23 becomes the direct feedback point for the displacement of the pry bar 20, and its positional change directly reflects the over-limit state of the spring tension.

[0042] Furthermore, when the handle 10 applies downward pressure, the tail 23 of the second segment 22 of the pry bar 20 undergoes controllable displacement within the slot 13. Initially, the tail 23 is fully embedded in the bottom of the slot, maintaining a corresponding positional relationship with the sensor 40 probe, such as physical contact. Once the prying force exceeds the threshold of the tension spring 30, the tail 23 moves outward from the slot 13 along with the lever movement of the second segment 22, disengaging from the sensing area of ​​the sensor 40. The amount of deflection of the tail 23 directly corresponds to the magnitude of the prying force at the front of the pry bar 20, and the reduction in the insertion depth of the tail 23 within the slot 13 triggers subsequent electronic signals.

[0043] Thus, by cooperating with the slot 13, the mechanism of the tail 23 extending into the slot 13 simplifies the displacement detection logic. The depth of the tail 23 extending into the slot 13 is preset to the trigger threshold of the sensor 40, thereby ensuring the reliability of the detection results. The entire structure connects the mechanical event of the pry bar 20 deflection with the mechanical event of the tail 23 deflecting from insertion to removal, and the alarm circuit board 50 issues an audible and visual alarm after the sensor 40 detects that the pry bar 20 deflection exceeds the limit, thereby improving the operational efficiency of the pry inspection alarm tool.

[0044] Please see the appendix Figure 1 and Figure 2 In one embodiment, the second segment 22 of the pry bar 20 is provided with a connecting hole 24, and at least two connecting holes 24 are arranged along the length direction of the second segment 22 of the pry bar 20. The pry bar 20 is connected to the tension spring 30 through the connecting hole 24 of its second segment 22.

[0045] Specifically, in this embodiment of the invention, at least two connecting holes 24 are formed along the length of the second segment 22 of the pry bar 20. These holes are evenly distributed in a linear array to form a hole group structure. The position of the hole group corresponds to the length of the lever arm of the second segment 22, with the front hole closer to the hinge point of the mounting bracket 11 and the rear hole near the tail 23 area. This arrangement along the length utilizes the length space of the pry bar 20, avoids occupying additional volume radially, and provides multiple optional anchor points for the spring connection. Each connecting hole 24 adopts a countersunk or through-hole design, with a smooth inner wall to reduce friction loss and ensure smooth installation and removal of the spring hook.

[0046] Furthermore, the tension spring 30 is directly connected to the connecting hole 24 via a hook. Specifically, the hook at one end of the tension spring 30 is embedded in the selected connecting hole 24 of the second section 22 of the pry bar 20, forming a rigid anchor. When the tension spring 30 is stretched, the tension is evenly transmitted to the pry bar 20 body through the hole wall. When the handle 10 is pressed down, the resistance of the tension spring 30 acts on the connecting hole 24 of the second section 22, which, combined with the lever principle, is converted into upper limit control of the front prying force. Multiple selectable positions of the hole group support flexible adjustment of the spring connection point: if the hook is fixed to a hole position near the front of the pry bar 20, the lever arm is shorter, and the front prying force threshold increases accordingly; conversely, when the hook is connected to a hole position near the tail 23 of the pry bar 20, the lever arm is extended, and the front threshold decreases. This design does not require changing the spring itself; the force control parameters can be adapted simply by switching the connecting hole 24.

[0047] In this way, the prying force corresponding to the pull-down springs 30 at multiple holes can be calculated using the lever principle. This allows the operator to select the optimal connection point based on the strength requirements of the weld point, optimizing the efficiency of the spring pull. For example, when inspecting high-strength welds, the spring hook can be fixed near the hole at the tail 23, increasing the lever arm length to reduce the actual prying force applied. Conversely, for fragile weld points, the hook can be moved to a forward hole to shorten the lever arm and increase the threshold protection. The entire connection mechanism allows for rapid adjustment through the physical layout of the connection holes 24, simplifying the operation process while ensuring force control accuracy, avoiding the limitations of traditional fixed designs.

[0048] In one embodiment, the end of the first segment 21 of the pry bar 20 is provided with a flat opening.

[0049] Specifically, in this embodiment of the invention, the end of the first segment 21 of the pry bar 20 is morphologically optimized, adopting a flat-mouth shape as the actuating structure. The flat-mouth shape forms a shovel-like mechanical contact interface, and the flat contact surface can completely fit the rectangular cross-section of the lower surface of the busbar, maximizing the contact area during insertion, avoiding local deformation caused by point force, and ensuring that the force is evenly distributed along the width direction of the busbar during prying. When the operator presses down the handle 10, the flat mouth wedges into the gap between the busbar and the battery cell, and the flat surface converts the downward pressure into a peeling force perpendicular to the welding surface. Compared with the traditional cylindrical pry bar 20, this significantly reduces the risk of shear damage to the edge of the busbar, while improving the accuracy and controllability of the force on the welding point.

[0050] Furthermore, the flat body maintains surface contact with the busbar throughout the pry inspection process, effectively dispersing pressure and preventing stress concentration that could lead to cracking of the metal laminate. Its rounded corner design at the ends also eliminates the risk of sharp edges scratching the cell surface, preventing over-testing. The flat opening design optimizes contact mechanics, ensuring that the testing force is effectively transmitted to the core area of ​​the welding surface while avoiding unnecessary structural damage caused by excessive local stress, thus reducing the probability of mistakenly damaging qualified solder joints from the outset.

[0051] Please see the appendix Figure 1 and Figure 2 In one embodiment, the flat opening of the first segment 21 of the pry bar 20 is close to the plane of the bottom side of the handle 10, and the second segment 22 of the pry bar 20 is connected to the top side of the handle 10 by a tension spring 30.

[0052] Specifically, in this embodiment of the invention, the flat end of the first segment 21 of the pry bar 20 is spatially positioned close to the bottom plane of the handle 10. This proximity ensures that when the operator presses down on the handle 10, the flat end can be inserted into the gap below the busbar with minimal travel, reducing unnecessary backlash between the flat end and the bottom of the handle 10. The flat end plane and the bottom plane of the handle 10 form an approximately parallel spatial arrangement, ensuring that the direction of the prying force is perpendicular to the welding surface, avoiding shearing forces due to angular deviations. This compact layout, close to the bottom, optimizes the operator's field of vision (the operator can directly see the insertion point of the flat end) and increases rigidity by shortening the length of the lever arm, preventing detection errors caused by bending or deformation of the pry bar 20.

[0053] More specifically, the second section 22 of the pry bar 20 is connected to the top side of the handle 10 by a tension spring 30, forming a force control module for the lever. One end of the tension spring 30 is hooked and fixed to a preset anchor point on the top side of the handle 10, and the other end is connected to a connecting hole 24 arranged on the second section 22, forming an oblique stretching path from the top side to the pry bar 20. When the operator presses down on the handle 10, the tension resistance of the spring is naturally perpendicular to the top side plane. The flat end of the first section 21 of the pry bar 20 is close to the bottom side of the handle 10. Its flat end serves as the force input end, and its proximity to the bottom side of the handle 10 makes the point of force application closer to the bottom side of the handle 10. That is, for the prying and inspection area, the bottom side of the handle 10 and the flat end of the first section 21 of the pry bar 20 are close to the same plane, reducing the space occupied by the tooling in the prying and inspection area.

[0054] Please see the appendix Figure 2 In one embodiment, the first segment 21 and the second segment 22 of the pry bar 20 are not axial.

[0055] Specifically, in this embodiment of the invention, the physical structure of the pry bar 20 is not a traditional straight rod. Its first segment 21 and second segment 22 are rigidly connected with axial offset by a preset bending angle. This different axis layout is manifested as a three-segment geometric structure. The hinge point at the mounting bracket 11 is the lever fulcrum. The first segment 21 extends from the fulcrum towards the front of the pry bar 20, while the second segment 22 extends from the same fulcrum towards the tail 23 of the pry bar 20. In the initial unused state, the axes of the first segment 21 and the second segment 22 of the pry bar 20 are parallel to the length direction of the handle 10.

[0056] When handle 10 is pressed down for prying, the force is transmitted to the hinge point via the second segment 22. The first segment 21 then rotates around the hinge point, generating a prying force. Because the two segments are not aligned, for example, if there is a corresponding angle, the long arm effect of the second segment 22 can be amplified: under the same handle 10 displacement, the displacement of the short arm of the first segment 21 is significantly less than the displacement of the tail 23 of the second segment 22. This displacement difference can be converted into force control through lever ratio calculation; that is, the tension of the spring 30 in the second segment 22 can be directly correlated with the prying force threshold of the first segment 21. (See attached...) Figure 2 As shown, when the first segment 21 and the second segment 22 of the pry bar 20 are not coaxial and their axes are parallel to each other, provided that the first segment 21 is close to the bottom plane of the handle 10 for easy operation and insertion into the inspection area, the displacement of the second segment 22 can be deflected with the top side of the handle 10 as the reference plane, and its deflection displacement is controlled within the detection range of the sensor 40 installed on the handle 10. Compared with the coaxial design of the first segment 21 and the second segment 22 of the pry bar 20, the front and rear ends 23 of the pry bar 20 can better adapt to the spatial relationship between the inspection area and the inspection area of ​​the sensor 40.

[0057] Meanwhile, the first segment 21 of the pry bar 20 is a short axis, focusing on busbar insertion and vertical prying. The short arm characteristic limits the displacement stroke, preventing damage to the weld joints due to excessive force. The second segment 22 of the pry bar 20 is a long axis, responsible for force transmission and displacement amplification of the tension spring 30. The long arm characteristic allows the sensor 40 to be triggered by even a small spring deformation. Furthermore, the functional independence of the two segments is achieved through axial offset, which avoids the force transmission path from intersecting and allows for independent optimization of their respective geometric parameters (e.g., the first segment 21 is thickened to resist bending, and the second segment 22 is reduced in weight to increase speed).

[0058] In this way, by distributing the first section 21 and the second end of the pry bar 20 at different heights on opposite axes in space, corresponding to the short arm and long arm functional areas of the lever respectively, a compact structure is achieved while satisfying the function of preventing over-inspection of the tooling.

[0059] In one embodiment, a tension spring 30 is detachably installed between the handle 10 and the pry bar 20, and tension springs 30 with different tension properties are installed to adapt to the force required for prying and inspection by the pry bar 20.

[0060] Specifically, in this embodiment of the invention, the tension spring 30 is installed at both ends using standardized interfaces such as hooks between the pre-set anchor point on the top side of the handle 10 and the connecting hole 24 of the second section 22 of the pry bar 20. After the hooks are embedded in the connecting hole 24 of the handle 10 and the matching slot of the pry bar 20, a mechanical interlock against pull-out is formed. Disassembly can be achieved simply by vertically lifting the hooks. This makes the tension spring 30 an independent and replaceable functional unit, providing a basis for dynamic adaptation. Before disassembly, the handle 10 is lightly pressed to bring the tension spring 30 to a zero-tension state, eliminating disassembly resistance. Disassembly can be achieved by vertically lifting the middle of the tension spring 30 with one hand. Then, the hook of the new tension spring 30 is aligned with the connecting hole 24 of the handle 10 and the matching slot of the pry bar 20 and pressed vertically into place. After pre-tightening, a light pull confirms the lock, completing the replacement and improving replacement efficiency.

[0061] Furthermore, the value of the detachable design lies in the precise adaptation of the prying force by replacing the tension springs 30 with those of different performance characteristics. This is based on the lever mechanics principle of the prying fixture, where the tension threshold of the tension spring 30 is amplified proportionally to the front prying force. When the operator replaces the tension spring 30 with a high stiffness coefficient, the force increases for the same displacement, and the prying force is simultaneously increased to match the high-strength welding inspection requirements. Conversely, using a low stiffness coefficient tension spring 30 reduces the force, avoiding over-inspection damage to fragile weld points. This mechanism, together with the axial connection holes 24 of the second section 22 of the pry bar 20, forms a dual adjustment dimension. Changing the performance of the tension spring 30 controls the force value benchmark, while adjusting the connection holes 24 changes the lever arm length; the two work together to achieve a wide range of force threshold coverage. Thus, the dynamic adaptation process does not interfere with the fixture's function; the sensor 40 always triggers the alarm through the displacement of the tail 23 of the pry bar 20, ensuring the universality and reliability of the detection logic.

[0062] In summary, this utility model provides a pry-and-pry alarm fixture. By inserting the front of the pry bar into the lower part of the busbar and pressing the handle downwards, when the downward pressure on the handle exceeds the upper limit of the tension spring, the tail of the pry bar shifts. The tail of the pry bar leaves the sensor slot, and the sensor transmits a signal to the alarm circuit board. The buzzer and LED on the alarm circuit board sound and indicate that the welding tension at this position meets the set upper limit. Utilizing the lever principle, the prying force at the front of the pry bar can be adjusted by changing the tension of the tension spring. This solves the subjective error of manual pry-and-pry operations, ensuring detection reliability while reducing the risk of over-detection.

[0063] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pry-detection alarm fixture, characterized in that, include: The handle (10) has a mounting bracket (11) at one end and a grip (12) at the other end; A pry bar (20) hinged to the mounting bracket (11) of the handle (10), the first segment (21) of the pry bar (20) being located outside the mounting bracket (11) of the handle (10), and the second segment (22) of the pry bar (20) being located between the mounting bracket (11) of the handle (10) and the grip (12); and A tension spring (30) is connected between the handle (10) and the pry bar (20). One end of the tension spring (30) is located between the mounting bracket (11) and the grip (12) of the handle (10), and the other end is located on the second section (22) of the pry bar (20).

2. The pry-detection alarm fixture according to claim 1, characterized in that, The handle (10) is equipped with a sensor (40) and an alarm circuit board (50). After the sensor (40) detects that the displacement of the second segment (22) of the pry bar (20) meets the set value, it emits an audible and visual indication through the alarm circuit board (50).

3. The pry-detection alarm fixture according to claim 2, characterized in that, The grip part (12) has a grip area (120) on the top side of the handle (10). The alarm circuit board (50) is installed inside the handle (10) corresponding to the grip area (120), and the grip area (120) is made of a light-transmitting material.

4. The pry-detection alarm fixture according to claim 2, characterized in that, The top side of the handle (10) is provided with a slot (13) for accommodating the second section (22) of the pry bar (20), and the sensor (40) is installed in the slot (13).

5. The pry-detection alarm fixture according to claim 4, characterized in that, The second section (22) of the pry bar (20) is provided with a tail (23), and the second end of the pry bar (20) extends into the slot (13) through the tail (23).

6. The pry-detection alarm fixture according to claim 1, characterized in that, The second section (22) of the pry bar (20) is provided with a connecting hole (24), and at least two of the connecting holes (24) are arranged along the length direction of the second section (22) of the pry bar (20). The pry bar (20) is connected to the tension spring (30) through the connecting hole (24) of its second section (22).

7. The pry-detection alarm fixture according to claim 1, characterized in that, The end of the first section (21) of the crowbar (20) is provided with a flat opening.

8. The pry-detection alarm fixture according to claim 7, characterized in that, The flat opening of the first section (21) of the pry bar (20) is close to the plane of the bottom side of the handle (10), and the second section (22) of the pry bar (20) is connected to the top side of the handle (10) by the tension spring (30).

9. The pry-detection alarm fixture according to claim 8, characterized in that, The first segment (21) and the second segment (22) of the crowbar (20) are not axially aligned.

10. The pry-detection alarm fixture according to claim 1, characterized in that, The tension spring (30) is detachably installed between the handle (10) and the pry bar (20). By installing tension springs (30) with different tension properties, the force required for prying and inspection by the pry bar (20) can be adapted.

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