A needle mounting device

Abstract

This utility model discloses a pin mounting device, including a clamping assembly and an operating handle. One end of the clamping assembly has an annular groove for accommodating a retaining ring, and the operating handle is located at the other end of the clamping assembly. The operating handle has an elastic element for providing a reset force to clamp and release the annular groove. The clamping assembly, together with the operating handle, allows the operator to remotely control the device from outside the cavity. The annular groove precisely accommodates the retaining ring, and the clamping force provided by the elastic element ensures that the retaining ring will not fall off during transport in the slit. A single-handed operation of the handle can stably transport the retaining ring to the vicinity of the retaining ring groove at the end of the pin, and align the retaining ring groove by rotating the counterweight, overcoming the problem that conventional tools cannot achieve precise positioning in blind areas. In addition, the pin directly penetrates the heating plate hole fixed inside the cavity; the clamping device guides the retaining ring to the end of the pin; after the counterweight passes through the pin, its own weight instantly presses the retaining ring into and locks it in the retaining ring groove. This design completely avoids the step of disassembling the heating plate.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor technology, and in particular to a pin mounting device. Background Technology

[0002] In the vacuum chamber of semiconductor coating equipment, the heating plate needs to be positioned and raised by multiple ejector pins. Under prolonged high-temperature conditions, these ejector pins are prone to breakage or deformation due to frequent extension and retraction, requiring periodic replacement. However, existing replacement procedures face two major technical bottlenecks:

[0003] First, the operating space inside the cavity is cramped. Operators cannot directly observe or touch the ejector pin mounting position located at the bottom of the heating plate. Especially when it is necessary to accurately embed the retaining ring into the retaining ring groove, conventional tools are unable to effectively complete the clamping, positioning, and assembly actions in such a confined space. Second, the existing replacement process has to adopt a full disassembly solution. This means that the complex sealing connection structure between the heating plate and the cavity must be removed first, and the heating components must be moved out of the cavity before the ejector pin and retaining ring can be installed from the outside. This process not only causes long-term production line interruptions, but also introduces multiple technical risks, including the potential damage to the fragile functional coating (such as special ceramic coating) on ​​the surface of the heating plate during disassembly; the risk of failure of the vacuum sealing interface after reassembly, which may lead to process gas leakage; and the difficulty in guaranteeing reset accuracy, which may cause a series of chain problems such as wafer transport jamming. Utility Model Content

[0004] The present invention provides a pin mounting device that solves the technical problem that the heating plate needs to be removed due to insufficient cavity space during traditional pin mounting.

[0005] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a pin mounting device for engaging one end of a pin with a heating plate and engaging the other end with a counterweight via a retaining ring. The pin mounting device includes a clamping assembly and an operating handle. One end of the clamping assembly has an annular groove for accommodating the retaining ring. The operating handle is disposed at the other end of the clamping assembly and has an elastic element for providing a reset force to clamp and release the annular groove.

[0006] In some embodiments, the ejector pin mounting device further includes an anti-detachment component disposed within the annular groove to prevent the retaining ring from falling off.

[0007] In some embodiments, the anti-detachment component includes a tooth-shaped retaining clip disposed on one side of the annular groove.

[0008] In some embodiments, the operating handle includes a first operating member and a second operating member, the first operating member and the second operating member being disposed opposite to each other, and the elastic element being disposed between the first operating member and the second operating member.

[0009] In some embodiments, the clamping assembly includes a first clamping member and a second clamping member, the first operating member is connected to the first clamping member, the second operating member is connected to the second clamping member, and the first clamping member and the second clamping member are cross-hinged by a hinge axis.

[0010] In some embodiments, the annular groove includes a first groove disposed at the end of the first clamping member and a second groove disposed at the end of the second clamping member. When the operating handle is pressed, the first clamping member and the second clamping member move toward each other to clamp the retaining ring between the first groove and the second groove.

[0011] In some embodiments, the weight has a through mounting hole, and the inner wall of the mounting hole has an annular groove, and the retaining ring can be inserted into the annular groove to achieve axial locking with the weight.

[0012] In some embodiments, the diameter of the mounting hole is larger than the diameter of the ejector pin, so that the counterweight can slide along the ejector pin axis and rotate circumferentially.

[0013] In some embodiments, the outer wall of the retaining ring is provided with a radial protrusion, and the end of the ejector pin that cooperates with the counterweight is provided with an annular groove. The radial protrusion matches the annular groove to achieve positioning of the retaining ring and the ejector pin.

[0014] In some embodiments, the elastic element is a compression spring, which drives the annular groove to be in a relaxed state in its natural state; when the first operating member and the second operating member are pressed and move towards each other, the compression spring is compressed, and at the same time drives the annular groove to clamp the retaining ring.

[0015] Compared with the prior art, the ejector pin mounting device of this utility model has at least the following beneficial effects:

[0016] The ejector pin mounting device provided by this utility model is used to make one end of the ejector pin cooperate with the heating plate, and the other end cooperate with the counterweight through the retaining ring. The ejector pin mounting device includes a clamping assembly and an operating handle. One end of the clamping assembly has an annular groove for accommodating the retaining ring. The operating handle is disposed at the other end of the clamping assembly, and the operating handle has an elastic element for providing a reset elastic force to achieve clamping and loosening of the annular groove.

[0017] Addressing the challenges of extremely limited operating space within the cavity and difficulty in directly accessing deeply concealed installation positions, a clamping assembly, combined with a slender operating handle, forms an extension tool, allowing the operator to remotely control the device from outside the cavity. An annular groove precisely accommodates tiny retaining rings, and the clamping force provided by an elastic element ensures the retaining rings do not fall off during transport in narrow spaces. A single-handed operation of the handle allows for stable delivery of the retaining ring to the vicinity of the retaining ring groove at the end of the ejector pin, and the rotating counterweight aligns it with the groove, overcoming the difficulty of achieving precise positioning in blind areas using conventional tools. To mitigate the risks associated with disassembling the heating plate, the entire installation process is completed in situ: the ejector pin directly penetrates the hole in the heating plate fixed within the cavity; the clamping device guides the retaining ring to the end of the ejector pin; after the counterweight passes through the ejector pin, its own weight instantly presses the retaining ring into and locks it in the retaining ring groove. This design completely eliminates the need for heating plate disassembly, removing the risks of ceramic coating damage, process gas leakage due to vacuum seal failure after reassembly, and wafer transfer failures caused by reset errors, significantly reducing maintenance time.

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This illustration shows a structural schematic diagram of a pin mounting device provided in an embodiment of the present invention;

[0021] Figure 2 This invention presents a front view of a counterweight in a pin mounting device according to an embodiment of the present invention.

[0022] Figure 3 yes Figure 2 A cross-sectional view along the BB direction;

[0023] Figure 4 This invention provides a schematic diagram illustrating the structure of a pin mounting device after the pin and heating plate are engaged in a specific configuration.

[0024] Figure 5 This invention provides a schematic diagram illustrating the structure of a pin mounting device after the clamping component and retaining ring are engaged, according to an embodiment of the present invention.

[0025] Figure 6 This invention provides a schematic diagram illustrating the structure of a pin mounting device after the counterweight and pin are engaged in a specific configuration.

[0026] Figure 7 This invention provides a schematic diagram illustrating the structure of a pin mounting device clamping assembly and a pin after they are engaged, according to an embodiment of the present invention.

[0027] Figure 8 yes Figure 7 A magnified view of a section at point A in the middle;

[0028] Figure 9 This illustration shows a schematic diagram of the structure of a pin mounting device provided by an embodiment of the present invention, in which the pin, heating plate, and counterweight are assembled.

[0029] Figure label:

[0030] 1. Ejector pin; 11. Annular groove; 2. Heating plate; 3. Snap ring; 31. Radial protrusion; 4. Counterweight; 41. Mounting hole; 42. Annular groove; 5. Clamping assembly; 51. Annular groove; 52. First clamping member; 53. Second clamping member; 54. Hinge shaft; 511. First groove; 512. Second groove; 6. Operating handle; 61. Elastic element; 62. First operating member; 63. Second operating member; 7. Anti-detachment assembly. Detailed Implementation

[0031] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0032] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0035] This embodiment provides a pin mounting device, such as Figures 1-9 As shown, the device is designed to allow one end of the ejector pin 1 to engage with the heating plate 2, and the other end to engage with the counterweight 4 via a retaining ring 3. The ejector pin mounting device includes a clamping assembly 5 and an operating handle 6. One end of the clamping assembly 5 has an annular groove 51 for accommodating the retaining ring 3. The operating handle 6 is located at the other end of the clamping assembly 5 and has an elastic element 61 for providing a reset force to achieve clamping and releasing of the annular groove 51.

[0036] In this embodiment, the ejector pin 1 passes through a pre-drilled hole in the heating plate 2. The clamping assembly 5 is the core part of the device, with an annular groove 51 at one end for pre-accommodating and positioning the retaining ring 3. The operating handle 6 is connected to the other end of the clamping assembly 5, and the operator operates by gripping it. The elastic element 61 is integrated inside the operating handle 6 or linked with the handle. During operation, one end of the ejector pin 1 is located in the hole of the heating plate 2, and its other end (with the retaining ring groove) needs to cooperate with the counterweight 4. The retaining ring 3 needs to be installed into the retaining ring groove at the end of the ejector pin 1 to lock the counterweight 4. The entire device is a single tool used to clamp the retaining ring 3 in the narrow space of the cavity and precisely guide and place it into the retaining ring groove position at the end of the ejector pin 1.

[0037] Specifically, the ejector pin 1 is used to lift and support the wafer on the heating plate 2. It needs to be replaced if it breaks or deforms, and is the target component for the installation operation. The heating plate 2 is the core component fixed inside the vacuum chamber; the ejector pin 1 needs to pass through its holes, and it should not be removed when replacing the ejector pin 1. The retaining ring 3 is a small annular part used to engage with the annular groove at the end of the ejector pin 1, serving to fix and lock it, preventing the weight 4 from falling off the ejector pin 1. The weight 4 engages with the end of the ejector pin 1 through its retaining groove and is locked by the retaining ring 3. It provides the necessary weight, and in the final step of installation, gravity is used to finally press the retaining ring 3 into and lock it into the retaining ring groove of the ejector pin 1. The clamping assembly 5 is the main structure of the device, used to position and transport the retaining ring 3 during installation. The operating handle 6 is for the operator to grip, allowing for precise operation of the entire device in confined spaces. The annular groove 51 is a specific structure at the end of the clamping assembly 5, designed to temporarily accommodate and fix the retaining ring 3, ensuring that the retaining ring 3 will not accidentally fall off during movement and positioning. The elastic element 61 is integrated into the operating handle 6, providing a reset force, which allows the operator to control the clamping and loosening of the annular groove 51 on the retaining ring 3 by pressing or releasing the handle with one hand, greatly simplifying the one-handed operation process.

[0038] In the specific working process, firstly, the ejector pin 1 is passed through the hole on the heating plate 2. Next, the retaining ring 3 is placed into the annular groove 51 at the end of the clamping assembly 5, and the operator clamps the retaining ring 3 in the annular groove 51 by operating the operating handle 6. Then, the weight 4 is passed through the ejector pin 1, and the operator holds the weight 4 by hand, temporarily stopping it at the upper part of the ejector pin 1. Afterwards, the operator holds the installation device (clamping assembly 5 and operating handle 6) and moves the clamped retaining ring 3 to the position at the end of the ejector pin 1 where the retaining ring 3 needs to be installed. Next, the weight 4 can be rotated to align its retaining groove, and then the operator releases the hand holding the weight 4, allowing the weight 4 to fall down along the ejector pin 1. During the fall of the weight 4, its weight will press the retaining ring 3 into and lock it into the retaining ring groove at the end of the ejector pin 1, thus completing the locking. Finally, the installation device is removed, and the installation is complete.

[0039] The ejector pin installation device provided in this embodiment effectively solves two core problems in the background technology through the coordinated work of its components: First, addressing the problem of extremely limited operating space inside the cavity and difficulty in directly accessing the deeply hidden installation position, the clamping component 5, together with the slender operating handle 6, constitutes an extension tool, allowing the operator to remotely control it from outside the cavity; the annular groove 51 precisely accommodates the tiny retaining ring 3, and with the clamping force provided by the elastic element 61, it ensures that the retaining ring does not fall off during transportation in the narrow gap; the retaining ring can be stably transported to the vicinity of the retaining ring groove at the end of the ejector pin 1 with one hand operating the handle, and the retaining ring groove is aligned by rotating the counterweight 4, overcoming the problem that conventional tools cannot achieve precise positioning in blind areas. Second, addressing the series of risks caused by disassembling the heating plate, the entire installation process is completed in the original position of the heating plate: the ejector pin 1 directly penetrates the hole of the heating plate 2 fixed in the cavity; the clamping device guides the retaining ring 3 to the end of the ejector pin; after the counterweight 4 passes through the ejector pin, its own weight falls and instantly presses the retaining ring into and locks it in the retaining ring groove. This design completely avoids the heating plate disassembly step, eliminating the risk of ceramic coating damage caused by traditional disassembly methods, the risk of process gas leakage caused by vacuum seal failure after reassembly, and wafer transmission failure caused by reset errors, thus significantly shortening maintenance time.

[0040] In a specific embodiment, such as Figure 1 As shown, the ejector pin mounting device also includes an anti-detachment component 7, which is disposed in the annular groove 51 to prevent the retaining ring 3 from falling off.

[0041] The anti-detachment component 7 is directly disposed inside the annular groove 51. Its structure is embedded or attached to the surface of the groove wall of the annular groove 51, forming an integral part or tightly fitting with the annular groove 51. When the retaining ring 3 is placed in the annular groove 51, the physical structure of the anti-detachment component 7 acts directly on the outer periphery or specific part of the retaining ring 3, forming a blocking or limiting contact, thereby constraining the retaining ring 3 within the predetermined position of the annular groove 51. The core function of the anti-detachment component 7 is to prevent the retaining ring 3 from accidentally detaching from the annular groove 51 during device operation, especially when transporting, positioning, and aligning in narrow cavities. This component uses mechanical blocking or elastic constraints to counteract vibration, tilting, or external force interference, ensuring that the tiny retaining ring 3 remains stably clamped before reaching the installation position at the end of the ejector pin 1, avoiding the risk of installation failure or part loss due to the retaining ring detaching.

[0042] When the retaining ring 3 is placed into the annular groove 51, the physical limiting structure of the anti-detachment component 7 automatically or through operation triggers, covering a portion or circumferential edge of the retaining ring 3 to form an anti-detachment lock. When the operator controls the device to move via the operating handle 6, the anti-detachment component 7 continuously provides a restraining force, preventing the retaining ring 3 from popping out or slipping out of the annular groove 51 during transportation. When the device transports the retaining ring 3 to the end of the retaining ring groove of the ejector pin 1 and completes the alignment of the counterweight 4 with the retaining groove, the operator releases the clamping force of the elastic element 61 via the operating handle 6. At the same time, the restraint of the anti-detachment component 7 is released synchronously. At this time, the falling counterweight 4 presses the retaining ring 3 into the retaining ring groove of the ejector pin 1 to complete the locking. This cooperation significantly improves the reliability of transporting the retaining ring 3 in confined spaces and eliminates the risk of repeated operations and equipment downtime caused by the fall of small parts.

[0043] In a specific embodiment, the anti-detachment component 7 includes a toothed fixing clip, which is disposed on one side of the annular groove 51. The anti-detachment component 7 employs a toothed fixing clip structure, specifically disposed on one side of the groove wall of the annular groove 51. Its toothed protrusions extend into the groove, allowing the toothed structure of the fixing clip to partially cover the edge area of ​​the retaining ring 3 when it is placed in the annular groove 51, forming a one-way mechanical block. The core effect of this design is that it completely eliminates the risk of accidental detachment of the retaining ring 3 during device transportation due to vibration, tilting, or operational shaking through physical limiting. It particularly ensures the clamping stability of the smaller diameter retaining ring 3 when passing through a height-restricted cavity. Simultaneously, the directional blocking characteristic of the toothed fixing clip allows the weight 4 to smoothly press the retaining ring 3 out of the annular groove 51 when it falls, achieving a conflict-free coordination between the anti-detachment function and the installation action.

[0044] In a specific embodiment, such as Figure 1 As shown, the operating handle 6 includes a first operating member 62 and a second operating member 63, which are disposed opposite to each other, and the elastic element 61 is disposed between the first operating member 62 and the second operating member 63.

[0045] The first operating element 62 and the second operating element 63 are core components of the operating handle 6, and are arranged parallel or nearly parallel to each other. The elastic element 61 is precisely arranged in the gap area between the first operating element 62 and the second operating element 63, with its two ends abutting or fixed to the inner walls of the two operating elements, providing a continuous reset force for their relative opening and closing movements. The first operating element 62 and the second operating element 63 together constitute the interface for the operator's direct hand force application. Their core function is to convert the gripping or pinching force applied by the operator onto them into control actions on the distal clamping assembly 5. Specifically, the operator pinches or presses the first operating element 62 and the second operating element 63 with one hand to bring them closer or further apart. This action is transmitted to the clamping assembly 5 through a mechanical connection, thereby driving the annular groove 51 to perform the operation of clamping or releasing the retaining ring 3, realizing reliable gripping and precise release of the tiny retaining ring in a narrow cavity.

[0046] In its natural state, the elastic force of the elastic element 61 pushes the first operating member 62 and the second operating member 63 to the open position. At this time, the annular groove 51 of the clamping assembly 5 is in a relaxed state, making it easy to insert the retaining ring 3. When the operator pinches the first operating member 62 and the second operating member 63 together with one hand to overcome the elastic force of the elastic element 61 and bring them closer to each other, this action causes the annular groove 51 of the clamping assembly 5 to contract through the linkage mechanism, thereby firmly clamping the retaining ring 3. After releasing the pressure of the hand, the elastic force of the elastic element 61 automatically pushes the first operating member 62 and the second operating member 63 back to the open position, which in turn causes the annular groove 51 to return to the relaxed state to release the retaining ring 3. This combination realizes the convenience of one-handed operation, significantly improves the control accuracy and efficiency of installing the retaining ring 3 in a height-restricted cavity, and at the same time, the automatic reset characteristic of the elastic element 61 ensures the continuity and reliability of the operation.

[0047] In a specific embodiment, such as Figure 1 As shown, the clamping assembly 5 includes a first clamping member 52 and a second clamping member 53. The first operating member 62 is connected to the first clamping member 52, and the second operating member 63 is connected to the second clamping member 53. The first clamping member 52 and the second clamping member 53 are cross-hinged by a hinge pin 54.

[0048] The first clamping member 52 and the second clamping member 53 are cross-hinged at the middle position by a hinge pin 54, forming an X-shaped movable structure similar to scissors; the first operating member 62 is fixedly connected to or integrally extended to the upper end of the first clamping member 52, and the second operating member 63 is fixedly connected to or integrally extended to the upper end of the second clamping member 53, so that the first operating member 62 and the second operating member 63 respectively serve as extended operating parts of the first clamping member 52 and the second clamping member 53; the annular groove 51 is provided at the lower end clamping part of the first clamping member 52 and the second clamping member 53.

[0049] When the operator pinches the first operating member 62 and the second operating member 63 with one hand, this action causes the first clamping member 52 and the second clamping member 53 to rotate relative to each other around the hinge shaft 54, causing the lower clamping part to close and the annular groove 51 to contract accordingly, thereby firmly clamping the retaining ring 3. After the operating member is released, the elastic force of the elastic element 61 pushes the first operating member 62 and the second operating member 63 to reset, causing the first clamping member 52 and the second clamping member 53 to rotate in the opposite direction around the hinge shaft 54, causing the lower clamping part to open and the annular groove 51 to relax and release the retaining ring 3. This combination amplifies the operating force through the leverage effect of the hinge shaft 54, significantly improving the clamping stability and release accuracy of the small retaining ring in a narrow space, and ensuring the convenience and reliability of one-handed operation.

[0050] In a specific embodiment, the annular groove 51 includes a first groove 511 disposed at the end of the first clamping member 52 and a second groove 512 disposed at the end of the second clamping member 53. When the operating handle 6 is pressed, the first clamping member 52 and the second clamping member 53 move toward each other so that the first groove 511 and the second groove 512 clamp the retaining ring 3.

[0051] The first groove 511 is precisely formed on the inner surface of the end clamping portion of the first clamping member 52, and the second groove 512 is symmetrically formed on the inner surface of the end clamping portion of the second clamping member 53. When the operating handle 6 is in the naturally open state, the first groove 511 and the second groove 512 are separated to form an opening, which facilitates the insertion of the retaining ring 3. When the operating handle 6 is pressed, the first clamping member 52 and the second clamping member 53 move towards each other with the hinge pin 54 as the fulcrum, causing the first groove 511 and the second groove 512 to move closer together until they close. At this time, the two grooves form a complete annular groove 51 structure. The core function of the first groove 511 and the second groove 512 is to jointly form a split annular groove 51 for accurately accommodating and positioning the retaining ring 3. Its split design allows the two grooves to apply clamping force evenly from both sides when the clamping member is closed, firmly covering the outer periphery of the retaining ring 3 and preventing it from shifting or falling off. When the clamping member is opened, the two grooves separate and the retaining ring 3 can be released smoothly.

[0052] The operator pinches the first operating element 62 and the second operating element 63 of the operating handle 6 with one hand, driving the first clamping element 52 and the second clamping element 53 to rotate around the hinge axis 54 and move towards each other, so that the first groove 511 and the second groove 512 close synchronously, tightly clamping and fixing the retaining ring 3 placed therebetween; after the operating handle 6 is released, under the action of the elastic element 61, the operating element resets and drives the clamping element to rotate in the opposite direction and separate, and the first groove 511 and the second groove 512 open to release the constraint on the retaining ring 3; this design realizes reliable gripping and precise release of the retaining ring 3 through the linkage of the grooves, especially ensuring the clamping stability and operational controllability of the retaining ring with a small diameter in the deep and narrow cavity.

[0053] In a specific embodiment, such as Figure 2 and Figure 3 As shown, the hammer 4 has a through mounting hole 41, and the inner wall of the mounting hole 41 has an annular groove 42. The retaining ring 3 can be embedded in the annular groove 42 to achieve axial locking with the hammer 4.

[0054] The hammer 4 has a through mounting hole 41, which allows the hammer 4 to pass entirely through the ejector pin 1. This allows the operator to push the hammer 4 to the top of the ejector pin 1 for temporary support, reserving operating space for the subsequent installation of the retaining ring. The annular groove 42 on the inner wall of the mounting hole 41 is a continuous closed groove, the size of which precisely matches the retaining ring 3. When the hammer 4 falls, it guides the retaining ring 3 to be inserted into the groove without deviation. When the retaining ring 3 is simultaneously inserted into the retaining ring groove at the end of the ejector pin 1 and the annular groove 42 of the hammer 4, a two-way mechanical interlock is formed, which completely restricts the axial displacement of the hammer 4 relative to the ejector pin 1, achieving a stable axial lock. In this embodiment, by passing the ejector pin 1 through the mounting hole 41, the annular groove 42, and the embedded engagement of the retaining ring 3, reliable assembly of micro parts is ensured in one go within a deep and narrow cavity that cannot be visually observed.

[0055] In a specific embodiment, the diameter of the mounting hole 41 is larger than the diameter of the ejector pin 1, so that the weight 4 can slide along the axial direction of the ejector pin 1 and rotate circumferentially.

[0056] The mounting hole 41 of the counterweight 4 has a diameter larger than that of the ejector pin 1, forming an annular gap. This gap allows the counterweight 4 to slide freely up and down along the axis of the ejector pin 1 without being affected by frictional resistance, providing the operator with the freedom to manually adjust the height of the counterweight. At the same time, the circumferential gap ensures that the counterweight 4 can rotate around the axis of the ejector pin 1, allowing the operator to precisely adjust the position of the annular groove 42 of the counterweight 4 by touch in a deep and narrow cavity that cannot be seen visually, until it is completely aligned with the retaining ring groove at the end of the ejector pin 1. This dual degree of freedom design significantly improves the positioning accuracy and assembly error tolerance of the micro retaining ring 3 in a blind assembly environment, and completely solves the operational bottleneck of "difficulty in accurately embedding the retaining ring into the retaining ring groove" in the background technology.

[0057] In a specific embodiment, such as Figure 4 and Figure 8 As shown, the outer wall of the retaining ring 3 is provided with a radial protrusion 31, and the end of the ejector pin 1 that cooperates with the counterweight 4 is provided with an annular groove 11. The radial protrusion 31 and the annular groove 11 are matched to realize the positioning of the retaining ring 3 and the ejector pin 1.

[0058] A radial protrusion 31 is added to the outer wall of the retaining ring 3, which forms a locally thickened mechanical locking part. An annular groove 11 is opened at the end of the ejector pin 1 that mates with the counterweight 4. The groove depth and contour size are precisely matched with the radial protrusion 31 of the retaining ring 3. When the counterweight 4 falls, its gravity drives the retaining ring 3 to move down synchronously. At this time, the radial protrusion 31 of the retaining ring 3 is forced into the annular groove 11 of the ejector pin 1, forming a physical interlocking of concave and convex. This fit completely eliminates the axial movement gap through the interference fit between the radial protrusion 31 and the annular groove 11, realizing zero displacement positioning of the retaining ring 3 on the ejector pin 1. At the same time, the tactile feedback generated when the radial protrusion 31 is embedded in the annular groove 11 provides the operator with a clear signal that the assembly is in place, ensuring reliable locking of the parts in a blind operation environment.

[0059] In a specific embodiment, the elastic element 61 is a compression spring, which drives the annular groove 51 to be in a relaxed state in its natural state; when the first operating member 62 and the second operating member 63 are pressed and move towards each other, the compression spring is compressed, and at the same time drives the annular groove 51 to clamp the retaining ring 3.

[0060] The elastic element 61 adopts a compression spring structure. In its naturally extended state, it uses its elastic force to open the first operating member 62 and the second operating member 63, which in turn drives the annular groove 51 to be in an expanded and relaxed state. At this time, the operator can quickly put the smaller diameter retaining ring 3 into the groove with one hand. When the operator squeezes the first operating member 62 and the second operating member 63 to make them move in opposite directions against the elastic force of the compression spring, the compression spring is linearly compressed and stores energy. At the same time, this mechanical movement is precisely converted into the radial contraction action of the annular groove 51 through the clamping component 5, so that the groove wall firmly clamps the retaining ring 3. In this embodiment, by synchronizing the spring deformation and the clamping action in real time, the retaining ring 3 can be instantly locked with one hand, which greatly improves the response speed and operational reliability of grasping small parts in deep and narrow cavities. Moreover, the spring compression and energy storage provides power guarantee for subsequent automatic reset.

[0061] The pin mounting device provided in this embodiment operates as follows:

[0062] At the start of operation, the compression spring is in its naturally extended state, and its elastic force opens the first operating member 62 and the second operating member 63, driving the first clamping member 52 and the second clamping member 53 to rotate and separate around the hinge axis 54, so that the first groove 511 and the second groove 512 are in an open state, forming a relaxed annular groove 51; at this time, the retaining ring 3 is placed into the annular groove 51, as... Figure 5As shown, the toothed retaining clips on the sidewall of the annular groove 51 automatically form a one-way limiting position on the edge of the retaining ring 3; the operator squeezes the first operating member 62 and the second operating member 63 with one hand to make them move towards each other against the force of the compression spring. This action causes the first clamping member 52 and the second clamping member 53 to close, so that the first groove 511 and the second groove 512 close and clamp the retaining ring 3; then the ejector pin 1 is inserted into the mounting hole of the heating plate 2, as shown. Figure 4 As shown, the handheld device delivers the clamping ring 3 to the end of the ejector pin 1; the mounting hole 41 of the counterweight 4 is passed through the ejector pin 1, as shown. Figure 6 As shown, utilizing the gap formed by the diameter of the mounting hole 41 being larger than the diameter of the ejector pin 1, the counterweight 4 is manually rotated to align its annular groove 42 with the position of the retaining ring 3 and hold it in place; the operating device aligns the radial protrusion of the retaining ring 3 with the annular groove at the end of the ejector pin 1, as shown. Figure 7 and Figure 8 As shown; the weight 4 is released and falls freely along the ejector pin 1. Its own weight presses the retaining ring 3 into both the annular groove of the ejector pin 1 and the annular groove 42 of the weight 4, achieving radial positioning of the retaining ring 3 with the ejector pin 1 and axial locking with the weight 4, as shown. Figure 9 As shown; finally, release the operating handle 6, the compression spring will automatically reset, causing the annular groove 51 to open and release the clamp, and the device can be removed to complete the installation.

[0063] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A pin mounting device, characterized in that, The ejector pin mounting device is designed to allow one end of the ejector pin to engage with the heating plate, and the other end to engage with the counterweight via a retaining ring. The ejector pin mounting device includes a clamping assembly and an operating handle. One end of the clamping assembly has an annular groove for accommodating the retaining ring. The operating handle is located at the other end of the clamping assembly and has an elastic element for providing a reset force to achieve clamping and releasing of the annular groove.

2. The ejector pin mounting device according to claim 1, characterized in that, The pin mounting device also includes an anti-detachment component, which is disposed in the annular groove to prevent the retaining ring from falling off.

3. The ejector pin mounting device according to claim 2, characterized in that, The anti-detachment component includes a tooth-shaped fixing clip, which is disposed on one side of the annular groove.

4. The ejector pin mounting device according to claim 1, characterized in that, The operating handle includes a first operating element and a second operating element, which are disposed opposite to each other, and the elastic element is disposed between the first operating element and the second operating element.

5. The ejector pin mounting device according to claim 4, characterized in that, The clamping assembly includes a first clamping member and a second clamping member. The first operating member is connected to the first clamping member, and the second operating member is connected to the second clamping member. The first clamping member and the second clamping member are cross-hinged by a hinge axis.

6. The ejector pin mounting device according to claim 5, characterized in that, The annular groove includes a first groove at the end of the first clamping member and a second groove at the end of the second clamping member. When the operating handle is pressed, the first clamping member and the second clamping member move toward each other, causing the first groove and the second groove to clamp the retaining ring.

7. The ejector pin mounting device according to claim 1, characterized in that, The hammer has a through mounting hole, and the inner wall of the mounting hole has an annular groove. The retaining ring can be inserted into the annular groove to achieve axial locking with the hammer.

8. The ejector pin mounting device according to claim 7, characterized in that, The diameter of the mounting hole is larger than the diameter of the ejector pin, so that the weight can slide along the axial direction of the ejector pin and rotate circumferentially.

9. The ejector pin mounting device according to claim 7, characterized in that, The outer wall of the retaining ring has a radial protrusion, and the end of the ejector pin that cooperates with the counterweight has an annular groove. The radial protrusion matches the annular groove to achieve positioning of the retaining ring and the ejector pin.

10. The ejector pin mounting device according to claim 5, characterized in that, The elastic element is a compression spring, which drives the annular groove to be in a relaxed state in its natural state; when the first operating member and the second operating member are pressed and move towards each other, the compression spring is compressed, and at the same time drives the annular groove to clamp the retaining ring.

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