A press-fit structure

Abstract

The application provides a press-fitting structure, which comprises a bottom plate, a fixing frame, a transmission mechanism, an operating handle, a press head and a limiting module, wherein the fixing frame is fixed on the bottom plate, the transmission mechanism is arranged on the fixing frame, the operating handle is connected to the first end of the transmission mechanism, the press head is connected to the second end of the transmission mechanism, the operating handle provides lifting or pressing force for the press head through the transmission mechanism, the limiting module is below the press head and is fixed on the bottom plate, and the limiting module is used for limiting the depth and flatness of the press head when pressed. The application can ensure that the position of the press head is completely uniform every time, avoids product defects caused by the fact that the lower surface of the press head is not parallel to the upper surface of the product under pressure, and improves the assembly precision.

Description

Technical Field

[0001] This application belongs to the field of printed circuit board assembly technology, and in particular relates to a press-fit structure. Background Technology

[0002] Printed Circuit Board Assembly (PCBA) is the process of assembling a printed circuit board (PCB) with various electronic components (such as chips, resistors, capacitors, inductors, etc.) to achieve electrical interconnection between the components, and finally forming a complete circuit board system after processes such as soldering.

[0003] Pins are key components on a PCBA used for electrical connections and mechanical fixation. During PCBA assembly, pins must be precisely installed onto the PCBA using a press-fit process, and the assembly accuracy directly affects the electrical performance and structural stability of the PCBA. The press-fit process is a solderless process that uses external mechanical force to press the pins into the through-holes of the PCBA, achieving electrical connection through mechanical means.

[0004] The existing manual pin press-fit structure has obvious defects in actual use, such as uneven pin height and PCB board warping. This not only affects the assembly accuracy, but may also cause product damage, low production line yield, and reduced production efficiency. Utility Model Content

[0005] This application provides a press-fitting structure that solves the problems of assembly deviation and low precision in existing manual press-fitting structures.

[0006] In a first aspect, this application provides a press-fitting structure, the press-fitting structure comprising: a base plate; a fixing frame, the fixing frame being fixed on the base plate; a transmission mechanism disposed on the fixing frame; an operating handle, the operating handle being connected to a first end of the transmission mechanism; a pressing head, the pressing head being connected to a second end of the transmission mechanism, the operating handle providing a lifting or pressing force to the pressing head through the transmission mechanism; and a limiting module, the limiting module being located below the pressing head and fixed on the base plate, the limiting module being used to limit the pressing depth and flatness of the pressing head.

[0007] In this application, the limiting module restricts the downward stroke of the pressure head. Regardless of the amount of force applied manually by the operator, the endpoint position of the pressure head each time it is pressed is uniformly controlled by the limiting module, ensuring that the PIN pin pressing position is completely consistent each time. This avoids product defects caused by the lower surface of the pressure head not being parallel to the upper surface of the product being pressed, thus improving assembly accuracy. At the same time, the consistent PIN pin pressing depth ensures that the PCB board is evenly stressed during pressing, preventing the PCB board from warping.

[0008] In one implementation of the first aspect, the press-fitting structure further includes a wire gauge assembly mounted on the fixed frame. The wire gauge assembly includes a wire rail and a slider. The press head is connected to the second end of the transmission mechanism via the slider. The extension direction of the wire rail is consistent with the direction of pressing down or lifting the press head. The operating handle provides a lifting or pressing force to the press head through the transmission mechanism and the wire gauge assembly.

[0009] In this implementation, the wire gauge assembly utilizes the guiding characteristics of the wire gauge to constrain the movement trajectory to the vertical direction, ensuring that the pressure head maintains a downward pressing posture perpendicular to the upper surface of the product to be pressed as it moves with the slider. Simultaneously, the limiting module 2 further ensures the flatness of the pressure head when it contacts the product surface, preventing local tilting. In summary, the pressing structure provided in this application avoids the perpendicularity and parallelism deviations caused by the clamp's own transmission clearance and self-limiting mechanism when the clamp directly drives the pressure head in the prior art, reducing product damage and significantly improving assembly yield. Furthermore, the coordinated movement of the pressure head, the wire gauge assembly, the transmission mechanism, and the operating handle ensures stable pressing accuracy.

[0010] In one implementation of the first aspect, the press-fitting structure further includes a connecting plate, the press head is connected to the slider via the connecting plate, the slider is connected to the second end of the transmission mechanism; and the connecting plate is provided with a plurality of connecting holes for fixing and adjusting the position of the press head.

[0011] In this implementation, the connection position of the pressure head can be adjusted through different connection holes to adapt to different pressing positions of the pressing product.

[0012] In one implementation of the first aspect, the limiting module includes at least two limiting posts and a fixing seat, the at least two limiting posts being mounted on the fixing seat, and the fixing seat being fixed to the base plate.

[0013] In one implementation of the first aspect, the fixing base is provided with a plurality of fixing holes, which are used to fix and adjust the positions of the at least two limiting posts.

[0014] In this implementation, the position of the limiting post can be adjusted through the multiple fixing holes to adapt to different pressing positions of the press-fitted product.

[0015] In one implementation of the first aspect, the pressing structure further includes a counting switch, which is mounted on the fixed frame and is used to count the number of times the pressing head is pressed down.

[0016] In this implementation, the counting switch is triggered by the pressing action of the pressure head. After each pressing is completed, the counting switch automatically counts once, realizing automatic recording of production capacity, replacing manual statistics, reducing data errors and labor costs, and facilitating production data management and output traceability.

[0017] In one implementation of the first aspect, the counting switch includes a proximity switch that counts the number of times the pressure head is pressed down by detecting the distance between the wire gauge assembly or the pressure head and the proximity switch; or a contact switch that counts the number of times the pressure head is pressed down by contact with the wire gauge assembly or the pressure head.

[0018] In one implementation of the first aspect, the press-fitting structure further includes a product fixing seat, which is located below the press head and fixed to the base plate.

[0019] In this implementation, the product fixing seat is used to position and fix the product to be pressed, so that the product remains stable during the pressing process and the pressing effect is not affected by product displacement.

[0020] In one implementation of the first aspect, the base plate has a plurality of positioning holes, which are used to fix and adjust the position of the product mounting base.

[0021] In this implementation, the position of the product fixing seat can be adjusted through the multiple positioning holes to adapt to different pressing positions of the pressing product.

[0022] In one implementation of the first aspect, the transmission mechanism includes a linkage transmission mechanism, and the connection between the pressure head and the second end of the transmission mechanism is a detachable connection.

[0023] As described above, the press-fitting structure of this application has the following beneficial effects:

[0024] The pressing structure provided in this application ensures the flatness of the upper surface of the product to be pressed by the pressing head, avoids pressing deviation in the parallel direction, and makes the pressing depth of the product to be pressed consistent and the pressure uniform, thereby improving the pressing accuracy and efficiency of the product to be pressed.

[0025] The pressing structure provided in this application ensures that the pressing head always maintains a pressing posture perpendicular to the upper surface of the product to be pressed when pressing down, avoiding pressing deviation in the vertical direction, further improving the pressing accuracy of the product to be pressed, while improving the yield of pressed products, reducing production costs and rework costs, and improving production efficiency by pressing in one step.

[0026] The press-fitting structure provided in this application can automatically record production capacity, reduce data errors and labor costs, and facilitate production data management and output traceability. Attached Figure Description

[0027] Figure 1 The diagram shown is a schematic diagram of a press-fit structure in the prior art as described in the embodiments of this application.

[0028] Figure 2 The diagram shown is a schematic representation of the overall structure of a press-fitting structure according to an embodiment of this application.

[0029] Figure 3 This is a front view of a press-fit structure as described in an embodiment of this application.

[0030] Figure 4 The image shown is a side view of a press-fit structure as described in an embodiment of this application.

[0031] Figure 5 The diagram shown is a structural schematic of the positioning module in a press-fitting structure according to an embodiment of this application.

[0032] Figure 6 The diagram shown is a structural schematic of a product fixing seat in a press-fitting structure according to an embodiment of this application.

[0033] Component designation explanation

[0034] 10 Press-fit structure 231 Fixing base

[0035] 11 Product contour base 232 limiting post

[0036] 12 pressure heads 240 fixing bracket

[0037] 13 Quick Clamping Pliers 250 Base Plate

[0038] 200 Press-fit structure 260 Product fixing base

[0039] 210 Quick clamp 261 Fixture

[0040] 211 Operating handle 262 Product contour positioning seat

[0041] 212 Linkage Mechanism 270 Line Gauge Assembly

[0042] 220 pressure head, 280 connecting plate

[0043] 230 Limit Module 290 Counting Switch Detailed Implementation

[0044] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0045] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the 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.

[0046] To provide a clearer understanding of the technical features, objectives, and effects of this application, a detailed description is now provided with reference to the accompanying drawings.

[0047] Specific embodiments of this application. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "up," "down," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the mechanism or element referred to must have a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, that component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0049] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, mechanisms, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0050] In the PCBA product assembly process, the pin press-fitting process is a core step that determines product performance and reliability, and its process accuracy directly affects the final product quality. However, the currently used manual pin press-fitting and positioning structure still has many problems in practical applications.

[0051] On the one hand, product quality defects are prominent, and yield control is difficult. For example... Figure 1As shown, the existing manual press-fit structure 10 mainly consists of three parts: a product positioning fixture 11, a press head 12, and a quick clamp 13. It primarily relies on the self-limiting function of the quick clamp 13 to achieve the downward positioning of the press head 12. However, in actual press-fit operations, when the quick clamp 13 drives the press head 12 downward, due to the inherent transmission clearance of the quick clamp 13, the perpendicularity between the press head 12 and the product cannot be guaranteed. Simultaneously, the self-limiting function of the quick clamp 13 cannot guarantee the parallelism between the press head 12 and the product. Uneven force on the press head 12 not only leads to inconsistent PIN pin pressing depths, directly affecting the connection stability between the PIN pins and the PCBA, but also causes localized overload on the PCBA, leading to board warping or even cracking, ultimately resulting in product scrap. These problems result in a low overall yield rate on the production line, increasing production and rework costs.

[0052] On the other hand, the efficiency of capacity statistics is low and the error rate is high. The daily production quantity of the existing press-fitting structure mainly relies on manual statistics, which not only occupies additional time costs, but also easily leads to deviations in capacity data due to manual counting errors.

[0053] Therefore, the following embodiments of this application provide a press-fitting structure that solves the technical problems of inconsistent product press-fitting depth and low production capacity statistics efficiency in the prior art.

[0054] like Figures 2 to 4 As shown, this embodiment provides a pressing structure 200, which limits the pressing depth of the pressing head when it contacts the upper surface of the product by limiting the pressing module, ensuring the flatness of the pressing head contacting the upper surface of the product, so that the pressing depth of the product to be pressed is consistent and the pressure is uniform, thereby improving the pressing accuracy and efficiency of the product to be pressed.

[0055] The following will take the products to be press-fitted as PIN pins and PCB boards as examples, and describe in detail the principle and implementation of a press-fitting structure 200 of this embodiment with reference to the accompanying drawings, so that those skilled in the art can understand the press-fitting structure 200 of this embodiment without creative effort.

[0056] like Figures 2 to 4 As shown, this embodiment provides a press-fitting structure 200, which includes a quick clamp 210, a press head 220, a limiting module 230, a fixing frame 240, and a base plate 250. The fixing frame 240 is fixed on the base plate 250. The quick clamp 210 includes an operating handle 211 and a transmission mechanism 212. The transmission mechanism 212 is disposed on the fixing frame 240. The operating handle 211 is connected to the first end of the transmission mechanism 212, and the press head 220 is connected to the second end of the transmission mechanism 212. The limiting module 230 is disposed on the base plate 250 and located below the press head 220.

[0057] The quick clamp 210 is the power triggering component of the pressing structure 200. It is manually controlled by the operator. When the operator holds the operating handle 211 of the quick clamp 210 and presses down, the transmission mechanism 212 of the quick clamp 210 provides the power for the pressing head 220 to move downward, starting the pressing process of the PIN pin. After the pressing is completed, it is also manually lifted by the operator.

[0058] By way of example and not limitation, the transmission mechanism 212 includes, but is not limited to, linkage transmission mechanism, gear and rack transmission mechanism, cam transmission mechanism, and rope transmission mechanism.

[0059] The pressure head 220 acts directly on the product to be pressed. Driven by the quick clamp 210, the pressure head 220 contacts the upper surface of the product and completes the pressing action. The accuracy of its movement directly affects the pressing quality of the PIN pins.

[0060] By way of example and not limitation, the connection between the pressure head 220 and the second end of the transmission mechanism 212 can be a non-detachable connection or a detachable connection. Exemplarily, the connection between the pressure head 220 and the second end of the transmission mechanism 212 can be a rigid fixed connection, such as a threaded connection, pin fixing, welding, or integral molding; the connection can also be an adjustable connection, adjusting parameters such as the axial extension, angular deflection, or lateral movement of the pressure head 220, for example, by adjusting components (flanges with perforated holes, rotatable threaded sleeves and threaded adjusting rods, slide rails and slider components, universal joints, etc.) and corresponding locking components to achieve adjustment and fixation; the connection can also be an elastic buffer connection, for example, an elastic gasket (such as a rubber pad or disc spring) is placed between the pressure head 220 and the second end of the transmission mechanism 212, and the connection is rigidly made by bolts, but the elastic gasket can deform slightly under pressure to compensate for unevenness on the workpiece surface.

[0061] The limiting module 230 is used to limit the pressing depth of the pressure head 220 after it contacts the upper surface of the product and to ensure the flatness of the pressure head when it contacts the product surface.

[0062] Figure 5 The diagram illustrates one possible structure of the limiting module 230, which includes a fixed base 231 and at least two limiting posts 232 fixed to the fixed base 231. Exemplarily, the limiting posts 232 may be flat-head bolts, and are fixed to the fixed base 231 by bolt connection.

[0063] In some embodiments, the fixing base 231 is provided with a plurality of fixing holes, which are used to fix the at least two limiting posts 232 and adjust the position of the at least two limiting posts 232 so as to adapt to different pressing positions of the pressing product.

[0064] In some embodiments, the top of the limiting post 232 is provided with a flexible material (such as rubber, thermoplastic elastomer, etc.) that is adapted to its shape.

[0065] It should be understood that Figure 5 Two limiting posts 232 are shown, and the fixing base 231 is provided with four fixing holes. The two limiting posts 232 are fixed on two of the fixing holes, and the remaining two fixing holes can be used to adjust the position of the two limiting posts 232. This application is not limited thereto.

[0066] In some embodiments, the pressing structure 200 further includes a product fixing seat 260, which is located below the pressing head 220 and fixed on the base plate 250. The product fixing seat 260 is used to position and fix the product to be pressed, so that the product remains stable during the pressing process and the pressing effect is not affected by product displacement.

[0067] For example, such as Figure 6 As shown, the product fixing seat 260 includes a fixing seat 261 and a product contour positioning seat 262. The product contour positioning seat 262 is adapted to the shape of the product to be pressed and fixed on the fixing seat 261. The fixing seat 261 is fixed on the base plate 250.

[0068] For example, the base plate 250 is provided with a plurality of holes, which are used for the fixed connection (such as by a positioning pin) between the product fixing seat 260 and the base plate 250 and for position adjustment, so as to adapt to different pressing positions of the pressing product.

[0069] In some embodiments, handles are provided on both sides of the base plate 250 to facilitate operators to move or transport the press-fit structure 200, providing convenient force application points for equipment transfer, installation and other operations.

[0070] In this embodiment, the operation process of the pressing structure 200 is as follows: the operator manually places the product to be assembled on the predetermined position or the product fixing seat 260, and then holds the operating handle 211 and presses it down. The transmission mechanism 212 drives the pressing head 220 to move down synchronously. The limiting module 230 will restrict the pressing head 220 from continuing to move down to ensure that the pressing position is consistent each time. After the pressing is completed, the operator manually lifts the operating handle 211 to the correct position, and then the operator takes out the pressed semi-finished product and puts it into the material box.

[0071] In this embodiment, the limiting module 230 restricts the downward stroke of the pressure head 220. Regardless of the amount of force applied manually by the operator, the endpoint position of the pressure head 220 is uniformly controlled by the limiting module 230 each time, ensuring that the PIN pin is pressed down at a completely consistent position each time. This avoids product defects caused by the lower surface 220 of the pressure head not being parallel to the upper surface of the product being pressed, and improves assembly accuracy.

[0072] Furthermore, the press-fit structure 200 also includes a wire gauge assembly 270 (such as a precision wire gauge), which is disposed on the fixed frame 240. The wire gauge assembly 270 connects the press head 220 to the second end of the transmission mechanism 212. The wire gauge assembly 270 is used to transmit the force applied by the transmission mechanism 212 to the press head 220 and to limit the movement direction and movement distance of the press head 220.

[0073] Specifically, the wire guide assembly 270 includes a wire rail and a slider. The wire rail is mounted on the fixed frame 240 and the extension direction of the wire rail is consistent with the vertical downward or upward direction of the pressure head 220. The first side of the slider is movably connected to the wire rail, the second side of the slider is fixedly connected to the pressure head 220, and the third side of the slider is fixedly connected to the second end of the transmission mechanism 212.

[0074] In some embodiments, the second side of the slider is fixedly connected to the pressure head 220 via a connecting plate, and the connecting plate is provided with a plurality of connecting holes. The plurality of connecting holes are used to fix the slider and the pressure head 220 (e.g., by means of a positioning pin) and to adjust the connection position of the pressure head through different connecting holes so as to adapt to different pressing positions of the pressing product.

[0075] In this embodiment, the operation process of the pressing structure 200 is as follows: the operator manually places the product to be assembled on the predetermined position or the product fixing seat 260, and then holds the operating handle 211 and presses it down. The transmission mechanism 212 drives the slider of the wire gauge assembly 270 to move down along the wire rail. The slider drives the pressing head 220 to move down synchronously. The limiting module 230 will restrict the pressing head 220 from continuing to move down, ensuring that the pressing position is consistent each time. After the pressing is completed, the operator manually lifts the operating handle 211 to the correct position, and then the operator takes out the pressed semi-finished product and puts it into the material box.

[0076] In this embodiment, the wire gauge assembly 270 utilizes the guiding characteristics of the wire gauge (constraining the movement trajectory to the vertical direction) to ensure that the pressure head 220 maintains a downward pressing posture perpendicular to the upper surface of the product to be pressed when it moves with the slider. At the same time, the limiting module 230 further ensures the flatness of the pressure head when it contacts the product board surface (avoiding local tilting). This avoids the perpendicularity and parallelism deviations caused by the clamp's own transmission clearance and self-limiting when the clamp directly drives the pressure head in the prior art, reducing product damage and significantly improving the assembly yield. Meanwhile, the wire gauge assembly 270 moves in coordination with the quick clamp 210 and the pressure head 220 to ensure stable pressing accuracy.

[0077] Furthermore, the pressing structure 200 also includes a counting switch 290, which is disposed on the fixed frame 240 and near the end of the pressing stroke of the pressing head 220. The counting switch 290 is used to record production capacity. Specifically, the counting switch 290 is triggered by the pressing action of the pressing head 220. Each time the pressing head 220 completes a pressing, the counting switch 290 is triggered and completes a count.

[0078] By way of example and not limitation, the counting switch 290 includes a proximity switch and a contact switch. The proximity switch is a non-contact electronic switch that automatically outputs an on / off signal to control the circuit and complete automatic counting by sensing the proximity of the corresponding component of the press-fit structure 200. For example, it can be an inductive proximity switch, a capacitive proximity switch, or a photoelectric proximity switch. The contact switch is a contact mechanical switch that closes or opens its internal conductive contacts through physical contact with the corresponding component of the press-fit structure 200, thereby realizing the circuit on / off and completing automatic counting.

[0079] In this embodiment, after each press is completed, the counting switch 290 automatically counts once, realizing automatic recording of production capacity, replacing manual statistics, reducing data errors and labor costs, and facilitating production data management and output traceability.

[0080] In summary, this embodiment provides a pressing structure 200. The 270 gauge assembly ensures the verticality of the pressing head during pressing and adjusts the pressing distance, guaranteeing that the pressing head always maintains a pressing posture perpendicular to the upper surface of the product to be pressed. The limiting module 230 further limits the pressing depth when the pressing head contacts the upper surface of the product, ensuring the flatness of the surface and resulting in consistent pressing depth and uniform pressure, thus improving pressing accuracy and efficiency. The counting switch 290 automatically records production capacity, reducing data errors and labor costs. The pressing process of the pressing structure 200 achieves "one-step" pressing through the collaborative working structure of each component, avoiding repeated adjustments, shortening the single pressing cycle, and improving overall production efficiency and product yield.

[0081] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0082] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A press-fit structure, characterized by, The press-fitting structure includes: Base plate; The fixing frame is fixed to the base plate; The transmission mechanism is mounted on the fixed frame; An operating handle is connected to the first end of the transmission mechanism; A pressure head is connected to the second end of the transmission mechanism, and the operating handle provides a lifting or pressing force to the pressure head through the transmission mechanism. A limiting module is located below the pressure head and fixed on the base plate. The limiting module is used to limit the depth and flatness of the pressure head when it is pressed down.

2. The press fit structure of claim 1, wherein The press-fitting structure also includes: A wire gauge assembly, mounted on the fixed frame, includes a wire guide and a slider. The pressure head is connected to the second end of the transmission mechanism via the slider. The extension direction of the wire guide is consistent with the downward or upward direction of the pressure head. The operating handle provides lifting or pressing force to the indenter through the transmission mechanism and the gauge assembly.

3. The press fit structure of claim 2, wherein The press-fitting structure also includes: A connecting plate is provided, the pressure head is connected to the slider via the connecting plate, and the slider is connected to the second end of the transmission mechanism; and The connecting plate is provided with multiple connecting holes, which are used to fix and adjust the position of the pressure head.

4. The press fit structure of claim 1, wherein The limiting module includes at least two limiting posts and a fixing seat. The at least two limiting posts are mounted on the fixing seat, and the fixing seat is fixed to the base plate.

5. The press fit structure of claim 4, wherein The fixing base is provided with multiple fixing holes, which are used to fix and adjust the position of the at least two limiting posts.

6. The press fit structure of claim 2, wherein The press-fitting structure also includes: A counting switch is mounted on the fixed frame and is used to count the number of times the pressure head is pressed down.

7. The press fit structure of claim 6, wherein The counting switch includes: A proximity switch that counts the number of times the indenter is pressed down by detecting the distance between the wire gauge assembly or the indenter and the proximity switch; or A contact switch that counts the number of times the pressure head is pressed down by the contact of the wire gauge assembly or the pressure head.

8. The press fit structure of claim 1, wherein The press-fitting structure also includes: The product fixing seat is located below the pressure head and fixed to the base plate.

9. The press fit structure of claim 8, wherein, The base plate has multiple positioning holes, which are used to fix and adjust the position of the product mounting base.

10. The press fit structure of claim 1, wherein The transmission mechanism includes a linkage transmission mechanism, and the connection between the pressure head and the second end of the transmission mechanism is detachable.

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