Wave soldering furnace jig cover plate pressing point

Abstract

The wave-soldering furnace jig cover plate pressing point comprises a connecting sleeve, a connecting rod penetrating through the connecting sleeve from top to bottom, a pressing head arranged at the bottom end of the connecting rod in a matched mode and a pressing spring connected to the connecting rod in a sleeving mode, a limiting cap is arranged at the top of the connecting rod, and the limiting cap abuts against the top of the connecting sleeve to form limiting. The connecting sleeve is divided into the clamping part and the limiting part, the diameter of the clamping part is smaller than that of the limiting part, and the clamping part is located above the limiting part, so that during installation, an assembled cover plate pressing point only needs to be inserted into a through hole in a plate through the clamping part on the connecting sleeve, and then installation can be completed; in addition, the connecting sleeve can be in close fit with the through hole through the clamping teeth, and falling off is avoided; in addition, through the first guide face of the inclined structure, the clamping part can be conveniently inserted into the through hole, the rear end of the anti-disengaging convex ring can form an inverted tooth-shaped structure, and therefore the anti-disengaging convex ring can be embedded into the through hole to form tight connection.

Description

TECHNICAL FIELD

[0001] The utility model relates to a furnace passing technical field, concretely relates to wave -soldering furnace passing fixture cover plate pressure point. BACKGROUND

[0002] In the design of wave -soldering fixture, the setting of cover plate pressure point is a key technical point. Cover plate pressure point is usually distributed on the gland of fixture, and is used for fixing PCB and its components, to ensure that their position is accurate and stable in the welding process. The number and position of pressure point need to be accurately designed according to the actual layout of PCB and the distribution of components, to ensure that each component can be fully protected and supported.

[0003] Referring to the Chinese utility model patent No. 201820115970. X discloses a kind of furnace passing fixtures, in the structure, the elastic pressure head device on cover plate is fixed tightly to the element on the front of PCB board, effectively solve the technical problem that PCB board is warped by heat, component is floated by tin, reduce the defective rate of product. However, when installing elastic pressure head device, bolt sleeve is first fixed in bolt hole on cover plate, then first bolt is passed through bolt sleeve, then first spring is sleeved on first screw, finally, pressure head is installed at the end of first bolt, such installation mode not only is inefficient, but also unstable, bolt sleeve and bolt hole are easily disconnected. In addition, since the pressure head is made of rubber material, it is easy to soften and deform when exposed to high temperature, so it is easy to reduce the compression effect. UTILITY MODEL CONTENTS

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a wave -soldering furnace passing fixture cover plate pressure point.

[0005] The utility model solves the technical problems thereof by adopting the following technical scheme:

[0006] Wave -soldering furnace passing fixture cover plate pressure point, including connecting sleeve, connecting rod passing through connecting sleeve from top to bottom, pressure head matched at the bottom end of connecting rod and pressure spring sleeved on connecting rod, the top of connecting rod is equipped with limit cap, and the limit cap is limited on the top of connecting sleeve, the two ends of pressure spring are respectively pressed on connecting sleeve and pressure head to generate thrust, the connecting sleeve includes integrally formed clamping portion and limiting portion, the diameter of clamping portion is less than the diameter of limiting portion, the outer surface of clamping portion is provided with annular structure clamping tooth, and the clamping tooth is tightly matched with through hole on cover plate.

[0007] In the utility model, the bottom of connecting rod is provided with external thread, the pressure head is provided with connecting hole, the inner side of connecting hole is provided with internal thread, and the pressure head is connected by thread screwing with bolt.

[0008] The utility model discloses a clamping tooth includes guide structure and anti -drop structure, the guide structure sets up on the one end of clamping portion away from the limiting portion, the diameter of guide structure is greater than or equal to the diameter of limiting cap, equal to the diameter of the through -hole on the cover plate.

[0009] Further, the anti-drop structure includes a plurality of anti-drop protruding rings arranged in sequence and spaced apart from the limiting portion direction from the guide structure, in the arrangement direction, the top of the front end of the next anti-drop protruding ring and the bottom of the rear end of the previous anti-drop protruding ring form the first guide surface of the inclined structure, the anti-drop protruding ring located at the front end is connected by the second guide surface between the guide structure.

[0010] Further, the spacing distance L of the adjacent two anti-drop protruding rings is equal to the width W of the anti-drop protruding ring.

[0011] Further, the end face of the limiting portion away from the one end of the clamping portion extends inwardly with a positioning groove, one end of the compression spring extends into the positioning groove and abuts against the inner end face of the positioning groove.

[0012] Further, the slot of the positioning groove and the end face of the limiting portion are provided with the limiting surface of the inclined structure.

[0013] The utility model has the following advantages and beneficial effects:

[0014] By dividing the connecting sleeve into the clamping portion and the limiting portion, the diameter of the clamping portion is smaller than the limiting portion and located above the limiting portion, during installation, only need to insert the assembled cover plate pressure point through the clamping portion on the connecting sleeve into the through-hole on the plate to complete the installation, that is, convenient and fast, and the connecting sleeve and the through-hole can be tightly matched by the clamping tooth to avoid falling off; in addition, the first guide surface of the inclined structure not only facilitates the insertion of the clamping portion into the through-hole, but also forms the inverted tooth structure at the rear end of the anti-drop protruding ring, so that it can be embedded into the through-hole to form a tight connection. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model is further illustrated as follows by combining with the drawings and embodiments:

[0016] Fig. 1 It is the structural schematic diagram of the cover plate pressure point in the embodiment;

[0017] Fig. 2 It is the assembly schematic diagram of the cover plate pressure point in the embodiment;

[0018] Fig. 3 It is the structural schematic diagram of the connecting sleeve in the embodiment;

[0019] Fig. 4 It is the front view of the connecting sleeve in the embodiment. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. However, this utility model is not limited to the following embodiments.

[0021] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0023] like Figs. 1 to 4 As shown, this embodiment discloses a wave soldering furnace fixture cover plate pressure point, including a connecting sleeve 1 for fixing to the cover plate, a connecting rod 2 passing through the connecting sleeve 1 from top to bottom, a pressure head 3 fitted at the bottom end of the connecting rod 2, and a compression spring 4 sleeved on the connecting rod 2. A limiting cap 21 is provided at the top of the connecting rod 2, and the limiting cap 21 abuts against the top of the connecting sleeve 1 to form a limit. The two ends of the compression spring 4 press against the connecting sleeve 1 and the pressure head 3 respectively to generate thrust. The connecting sleeve 1 includes a cylindrical snap-fit ​​part 11 and a... The limiting part 12 and the snap-fit ​​part 11 are located above the limiting part 12 and are integrally formed. The diameter of the snap-fit ​​part 11 is smaller than the diameter of the limiting part 12. The outer surface of the snap-fit ​​part 11 is provided with snap-fit ​​teeth 13 of an annular structure. The snap-fit ​​teeth 13 are tightly fitted with the through hole on the cover plate. During installation, the assembled cover plate can be installed by simply inserting the snap-fit ​​part 11 on the connecting sleeve 1 into the through hole on the plate. This is convenient and quick. In addition, the snap-fit ​​teeth 13 can also make the connecting sleeve 1 tightly fitted with the through hole to prevent it from falling off.

[0024] In this embodiment, the bottom of the connecting rod 2 is provided with an external thread 22, the pressure head 3 is provided with a connecting hole 31, the inner side of the connecting hole 31 is provided with an internal thread 32, and the pressure head 3 and the bolt are connected by screwing the thread. Preferably, the length of the pressure head 3 is not limited, and can be replaced and adjusted according to the distance between the cover plate and the PCB board.

[0025] In this embodiment, the engaging tooth 13 includes a guide structure 131 and an anti-detachment structure 132. The guide structure 131 is disposed on the engaging portion 11 at one end away from the limiting portion 12. The diameter of the guide structure 131 is greater than or equal to the diameter of the limiting cap 21 and equal to the diameter of the through hole on the cover plate. The anti-detachment structure 132 includes a plurality of anti-detachment protrusions 133 arranged sequentially and at intervals from the guide structure 131 toward the limiting portion 12. In the arrangement direction, the top of the front end of the latter anti-detachment protrusion 133 is adjacent to the front end of the former anti-detachment protrusion 133. A first guide surface 134 with an inclined structure is formed between the bottom of the rear end of the 33. In addition, the anti-detachment protrusion 133 located at the front end is connected to the guide structure 131 through a second guide surface 135. Preferably, the interval L between two adjacent anti-detachment protrusions 133 is equal to the width W of the anti-detachment protrusion 133. The first guide surface 134 with an inclined structure not only facilitates the insertion of the snap-fit ​​part 11 into the through hole, but also makes the rear end of the anti-detachment protrusion 133 form a reverse tooth structure, so that it can be embedded into the through hole to form a tight connection.

[0026] Furthermore, a positioning groove 121 extends inward from the end face of the limiting part 12 away from the snap-fit ​​part 11, and one end of the compression spring 4 extends into the positioning groove 121 and abuts against the inner end face of the positioning groove 121.

[0027] Furthermore, a limiting surface 122 with an inclined structure is provided between the groove opening of the positioning groove 121 and the end face of the limiting part 12. When the fit between the through hole on the cover plate and the snap-fit ​​part 11 is too tight to be inserted manually, the pressure spring 4 can be fully compressed into the positioning groove 121 by the pressure block, and one end of the pressure block is pressed against the limiting surface 122. At this time, the pressure block can be tapped with other tools, and the snap-fit ​​part 11 can be inserted into the through hole by tapping. Therefore, the limiting surface 122 can make the pressure block form a radial limit to prevent shaking.

[0028] The above description in this specification is merely an illustrative example of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the specific embodiments described or adopt similar methods to replace them, as long as they do not deviate from the content of this specification or exceed the scope defined in the claims, they shall all fall within the protection scope of this invention.

Claims

1. A wave soldering furnace fixture cover plate pressure point, comprising a connecting sleeve (1), a connecting rod (2) passing through the connecting sleeve (1) from top to bottom, a pressure head (3) fitted at the bottom end of the connecting rod (2), and a compression spring (4) sleeved on the connecting rod (2). A limiting cap (21) is provided at the top of the connecting rod (2), and the limiting cap (21) abuts against the top of the connecting sleeve (1) to form a limit. The two ends of the compression spring (4) press against the connecting sleeve (1) and the pressure head (3) respectively to generate thrust. Its characteristics are: The connecting sleeve (1) includes an integrally formed snap-fit ​​part (11) and a limiting part (12). The diameter of the snap-fit ​​part (11) is smaller than the diameter of the limiting part (12). The outer surface of the snap-fit ​​part (11) is provided with snap-fit ​​teeth (13) of an annular structure. The snap-fit ​​teeth (13) are tightly fitted with the through hole on the cover plate.

2. The pressure point of the wave soldering furnace fixture cover plate according to claim 1, characterized in that: The bottom of the connecting rod (2) is provided with an external thread (22), the pressure head (3) is provided with a connecting hole (31), the inner side of the connecting hole (31) is provided with an internal thread (32), and the pressure head (3) is connected to the bolt by screwing the thread.

3. The pressure point of the wave soldering furnace fixture cover plate according to claim 1, characterized in that: The snap-fit ​​tooth (13) includes a guide structure (131) and an anti-detachment structure (132). The guide structure (131) is located on the snap-fit ​​part (11) at one end away from the limiting part (12). The diameter of the guide structure (131) is greater than or equal to the diameter of the limiting cap (21) and equal to the diameter of the through hole on the cover plate.

4. The pressure point of the wave soldering furnace fixture cover plate according to claim 3, characterized in that: The anti-detachment structure (132) includes a plurality of anti-detachment protrusions (133) arranged sequentially at intervals from the guide structure (131) toward the limiting part (12). In the arrangement direction, a first guide surface (134) with an inclined structure is formed between the top of the front end of the last anti-detachment protrusion (133) and the bottom of the rear end of the previous anti-detachment protrusion (133). The anti-detachment protrusion (133) located at the front end is connected to the guide structure (131) through a second guide surface (135).

5. The pressure point of the wave soldering furnace fixture cover plate according to claim 4, characterized in that: The distance L between two adjacent anti-detachment protrusions (133) is equal to the width W of the anti-detachment protrusion (133).

6. The pressure point of the cover plate of the wave soldering furnace fixture according to claim 1, characterized in that: A positioning groove (121) extends inward from the end face away from the snap-fit ​​part (11) on the limiting part (12), and one end of the compression spring (4) extends into the positioning groove (121) and abuts against the inner end face of the positioning groove (121).

7. The pressure point of the wave soldering furnace fixture cover plate according to claim 6, characterized in that: The positioning groove (121) has an inclined limiting surface (122) between the groove opening and the end face of the limiting part (12).

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