Double-contact-point board-to-board connector
By designing a dual-contact board-to-board connector with symmetrical spring arms and an inward-folding structure, the problem of poor contact in floating connectors under high-frequency vibration was solved, achieving stable electrical connection and signal transmission, and improving the connector's vibration resistance and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JUSTCONN ELECTRONIC TECHNOLOGY (DONG GUAN) CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
Existing floating board-to-board connectors are prone to poor contact and poor elastic deformation of the end bullet arms under high-frequency vibration environments, which affects the performance and reliability of the connectors.
A dual-contact board-to-board connector is designed, employing symmetrically arranged first and second spring arms, combined with an inward folding structure and multi-level retaining protrusions to form dual contact points and a progressive retaining effect. Precise positioning and stable installation are achieved through insertion slots and limiting grooves, enhancing vibration resistance.
In high-frequency vibration environments, the dual-contact structure improves contact stability and reliability, avoids poor contact, ensures stable connection and reliable signal transmission of terminals under complex working conditions, and extends service life.
Smart Images
Figure CN224153604U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of connectors, specifically to a dual-contact board-to-board connector. Background Technology
[0002] Board-to-board connectors are core components for electrical connections between circuit boards within electronic devices, and have a wide range of applications, including but not limited to communication equipment, consumer electronics, automotive electronics, industrial automation, medical devices, and military manufacturing. As electronic products become smaller and lighter, the design of board-to-board connectors is constantly being improved to adapt to more complex application environments and higher performance requirements.
[0003] Existing floating board-to-board connectors are mainly used to address the effects of substrate assembly positional deviations and external vibrations. Common solutions include, but are not limited to, the following: First, by incorporating elastic elements inside the connector, allowing it to move freely within a certain range and thus absorb assembly errors; second, by employing special pin designs that enable the pins to automatically adjust their position during mating; third, by optimizing the connector's structural design, such as adding foolproof structures to ensure correct insertion and removal directions and reduce the possibility of misoperation; and fourth, by improving the injection molding process to enhance the overall quality and stability of the connector.
[0004] However, existing floating board-to-board connectors still have some shortcomings. First, the contact surface of existing board-to-board connectors is relatively simple. Under long-term high-frequency vibration, the mating terminals are prone to poor contact or even complete failure. In addition, the bullet arms of existing connectors are difficult to achieve stable positioning and large-scale plastic deformation. This makes the connectors perform poorly in actual use. These problems limit the widespread promotion and use of existing floating board-to-board connectors in high-performance applications. Utility Model Content
[0005] The purpose of this invention is to address the above-mentioned defects by providing a dual-contact board-to-board connector. This solves the technical problems in the background art where the mating terminals are prone to poor contact during actual use, and the elastic deformation effect of the end bullet arms is not good, thus affecting the use of the connector.
[0006] The objective of this utility model is achieved through the following means:
[0007] A dual-contact board-to-board connector includes a mounting base, on which a mating groove is provided, and a protruding insertion protrusion is provided in the mating groove. The bottom of the mounting base is provided with an insertion slot communicating with the mating groove. The mounting base is connected to a plurality of mating terminals through the insertion slot.
[0008] The mating terminal includes a spring arm portion, a retaining portion, and a terminal welding portion. The mating terminal is paired and inserted into the insertion slot. The spring arm portion of the mating terminal extends through the insertion slot and protrudes into the inner wall of the mating groove. The spring arm portion includes a first spring arm and a second spring arm. The first spring arm and the second spring arm are arranged opposite to each other on the retaining portion, and a mating gap is provided between the first spring arm and the second spring arm. The ends of the first spring arm and the second spring arm near the retaining portion are respectively formed by bending to form a first elastic portion and a second elastic portion. The inner sides of the first spring arm and the second spring arm are respectively provided with a first contact protrusion and a second contact protrusion. The terminal welding portion is located at the bottom of the retaining portion and is exposed at the bottom of the fixing base. The side of the retaining portion is provided with a protruding structure for locking.
[0009] Furthermore, as described above, the mating groove is located on the top of the fixing base, and the insertion protrusion is located in the middle of the mating groove, so that the insertion protrusion distributes the mating groove at intervals.
[0010] By setting the mating groove on the top of the fixing base and using the insertion protrusion to separate them, two symmetrically arranged mating areas are formed, which reduces mechanical interference between different terminals under high-frequency vibration environment, avoids terminal offset or contact surface misalignment caused by vibration, and thus improves the contact stability of the connector under complex working conditions.
[0011] Further as described above, the insertion slot includes a retaining portion for mating and connecting the retaining portion and a limiting groove communicating with the retaining portion. The floating terminal is inserted and mated into the insertion slot from the bottom of the fixed seat. The limiting groove includes a first groove and a second groove. The first spring arm and the second spring arm pass through the retaining portion and are respectively engaged and mated with the first groove and the second groove.
[0012] The combination design of the retaining part and the limiting groove enables precise positioning and fixation of the docking terminal: the retaining part ensures that the retaining part is firmly installed, and the limiting groove is used to retain the first spring arm and the second spring arm respectively through the first groove and the second groove. This structure can prevent the terminal from loosening or excessively deforming during vibration, while maintaining reliable contact between the spring arm and the docking part to avoid contact failure.
[0013] Furthermore, as described above, the first spring arm and the second spring arm are symmetrically arranged, and the ends of the first spring arm and the second spring arm extend toward the groove of the mating groove.
[0014] The symmetrical design of the double-arm structure can evenly distribute the stress generated by vibration, avoiding fatigue failure of one arm due to long-term uneven stress. The layout of the arms extending towards the slot at the end expands the effective contact area, thereby reducing the risk of poor contact.
[0015] Optionally, in some embodiments, the first and second spring arms are asymmetrically arranged.
[0016] Further, as described above, the protrusion structure includes a first retaining protrusion and a second retaining protrusion arranged in sequence. The first retaining protrusion and the second retaining protrusion are disposed on one side of the retaining portion, and the protrusion amplitude of the first retaining protrusion and the second retaining protrusion increases sequentially. The inner side of the retaining portion is provided with a retaining groove for matching with the first retaining protrusion and the second retaining protrusion.
[0017] The multi-level retaining protrusions (with increasing amplitude design) on the side of the retaining part cooperate with the retaining groove to form a progressive retaining effect. The first and second retaining protrusions further enhance the retaining force when vibration intensifies, effectively resisting the displacement tendency of the terminal caused by high-frequency vibration, ensuring that the terminal maintains the designed position for a long time and improving the vibration resistance performance.
[0018] Furthermore, as described above, the fixing base has connecting grooves on opposite sides, and welding fixing pieces for welding are held and connected in the connecting grooves.
[0019] The welding retaining plate is connected to the retaining base through the connecting groove, providing a support point for the entire connector, and the retaining base can be connected to the external mounting end by welding.
[0020] Furthermore, as described above, the first elastic portion and the second elastic portion are bent and extended through the inward folding gap, so that the first elastic portion and the second elastic portion form an angle under bending.
[0021] The inward folding structure of the spring arm increases the elastic deformation space, giving the terminal a greater buffer margin under vibration and impact. The included angle formed by the inward fold can disperse stress concentration, preventing the spring arm from undergoing plastic deformation due to repeated bending, while maintaining a constant contact pressure on the contact element, ensuring stable contact resistance in high-frequency vibration environments, and improving signal transmission reliability.
[0022] The beneficial effects of this utility model are as follows: By setting a first contact protrusion and a second contact protrusion on the inner sides of the first and second spring arms respectively, a double contact point structure is formed, increasing the contact area and the number of contact points between the terminal and the mating component. In a high-frequency vibration environment, the double contact points can share the vibration impact, reduce the risk of poor contact due to fatigue or displacement of a single contact point, and ensure good contact between the mating terminal and the external mating component, achieving high-precision positioning stability and reliability.
[0023] The first and second elastic arms are arranged opposite each other and form a mating gap, so that the elastic arm portion has elastic deformation space, and the first and second elastic portions formed by bending extend the length of the first and second elastic arms, thereby expanding the elastic deformation range of the mating terminal and improving the working reliability of the connector in complex vibration environment. Attached Figure Description
[0024] Figure 1This is a top-view schematic perspective view of the overall structure of this embodiment;
[0025] Figure 2 This is a three-dimensional schematic diagram of the overall structure from a bottom-view perspective in this embodiment;
[0026] Figure 3 This is an exploded view of this embodiment;
[0027] Figure 4 This is a cross-sectional view of this embodiment;
[0028] Figure 5 This is a schematic diagram of the structure of the fixing base in this embodiment;
[0029] Figure 6 This is a schematic diagram of the docking terminal structure in this embodiment;
[0030] The reference numerals in the figure are as follows:
[0031] 100-Fixing base, 101-Mating groove, 102-Plug-in protrusion, 103-Holding part, 104-Limiting groove, 1041-First groove, 1042-Second groove, 105-Connecting groove, 106-Holding groove;
[0032] 200 - mating terminal, 201 - spring arm portion, 2011 - first spring arm, 2012 - second spring arm, 2013 - first elastic portion, 2014 - second elastic portion, 2015 - first contact protrusion, 2016 - second contact protrusion, 202 - holding portion, 203 - terminal welding portion, 204 - mating gap, 205 - first retaining protrusion, 206 - second retaining protrusion. Detailed Implementation
[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0034] In this embodiment, refer to Figures 1-6 The specific implementation of the dual contact point board-to-board connector includes a fixed base 100, on which a mating groove 101 is provided, and a protruding insertion protrusion 102 is provided in the mating groove 101. The bottom of the fixed base 100 is provided with an insertion slot communicating with the mating groove 101, and the fixed base 100 is connected to a mating terminal 200 through the insertion slot.
[0035] The mating terminal 200 includes a spring arm portion 201, a retaining portion 202, and a terminal welding portion 203. The mating terminal 200 is mated and inserted into an insertion slot, and the spring arm portion 201 of the mating terminal 200 extends through the insertion slot and protrudes into the inner wall of the mating groove 101. The spring arm portion 201 includes a first spring arm 2011 and a second spring arm 2012. The first spring arm 2011 and the second spring arm 2012 are disposed opposite to each other on the retaining portion 202, and a mating gap 20 is provided between the first spring arm 2011 and the second spring arm 2012. 4. The first elastic arm 2011 and the second elastic arm 2012 are bent to form a first elastic part 2013 and a second elastic part 2014 respectively. The inner sides of the first elastic arm 2011 and the second elastic arm 2012 are respectively provided with a first contact protrusion 2015 and a second contact protrusion 2016. The terminal welding part 203 is provided at the bottom of the holding part 202 and exposed at the bottom of the fixing base 100. The side of the holding part 202 is provided with a protruding structure for holding.
[0036] In practical implementation, the mating terminal 200 can be made of copper alloy, which has good conductivity and fatigue resistance, or stainless steel, to improve durability. Meanwhile, the width of the mating terminal 200 can be selected according to the appropriate cross-sectional size based on the current, ensuring safe and reliable power transmission.
[0037] Reference Figure 5 The docking groove 101 is disposed on the top of the fixing base 100, and the insertion protrusion is disposed in the middle of the docking groove 101, so that the insertion protrusion distributes the docking groove 101 at intervals.
[0038] By setting the mating groove 101 on the top of the fixing base 100 and using the insertion protrusion to separate them, two symmetrically arranged mating areas are formed, which reduces mechanical interference between different terminals under high-frequency vibration environment, avoids terminal offset or contact surface misalignment caused by vibration, and thus improves the contact stability of the connector under complex working conditions.
[0039] In practice, the mounting base 100 can be made of metal or plastic materials, which have high mechanical strength and corrosion resistance.
[0040] Reference Figure 5 The insertion slot includes a retaining part 103 for mating and connecting the retaining part 202 and a limiting groove 104 communicating with the retaining part 103. The floating terminal is inserted and mated into the insertion slot from the bottom of the fixing seat 100. The limiting groove 104 includes a first groove 1041 and a second groove 1042. The first spring arm 2011 and the second spring arm 2012 pass through the retaining part 103 and are respectively mated with the first groove 1041 and the second groove 1042.
[0041] The combined design of the retaining part 103 and the limiting groove 104 achieves precise positioning and fixation of the docking terminal 200: the retaining part 103 ensures that the retaining part 202 is securely installed, and the limiting groove 104 is used to retain the first spring arm 2011 and the second spring arm 2012 through the first groove 1041 and the second groove 1042 respectively. This structure can prevent the terminal from loosening or excessively deforming during vibration, while maintaining reliable contact between the spring arm and the docking part to avoid contact failure.
[0042] In the specific implementation process, the first spring arm 2011 and the second spring arm 2012 are used to hold the external male end of the connector, so that the first spring arm 2011 and the second spring arm 2012 are engaged and paired in the first groove 1041 and the second groove 1042, thereby improving the contact effect and stability with the male end of the connector.
[0043] The first elastic arm 2011 and the second elastic arm 2012 are symmetrically arranged, and the ends of the first elastic arm 2011 and the second elastic arm 2012 extend toward the groove of the docking groove 101.
[0044] The symmetrical design of the double-arm structure can evenly distribute the stress generated by vibration, avoiding fatigue failure of one arm due to long-term uneven stress. The layout of the arms extending towards the slot at the end expands the effective contact area, thereby reducing the risk of poor contact.
[0045] Optionally, in some embodiments, the first spring arm 2011 and the second spring arm 2012 are asymmetrically arranged.
[0046] In the specific implementation process, the first elastic part 2013 and the second elastic part 2014 are arranged in a "U" shape. When subjected to external force, the first elastic arm 2011 and the second elastic arm 2012 undergo adaptive deformation, avoiding the plastic deformation failure problem caused by concentrated stress in the traditional single elastic arm structure, and extending the service life. At the same time, the mating gap 204 formed between the first elastic arm 2011 and the second elastic arm 2012 further ensures the insertion and assembly with the external male connector.
[0047] In this embodiment, the lengths of the first elastic arm 2011 and the second elastic arm 2012 are extended by the first elastic portion 2013 and the second elastic portion 2014 formed by inward folding, so that the elastic arm can provide a more stable restoring force under vibration or impact load, reduce the permanent deformation of the terminal caused by long-term stress, and ensure that the connector maintains stable electrical connection performance in dynamic environments.
[0048] Reference Figure 6The protrusion structure includes a first retaining protrusion 205 and a second retaining protrusion 206 arranged sequentially. The first retaining protrusion 205 and the second retaining protrusion 206 are disposed on one side of the retaining portion 202, and the protrusion amplitude of the first retaining protrusion 205 and the second retaining protrusion 206 increases sequentially. The inner side of the retaining portion 103 is provided with a retaining groove 106 for matching with the first retaining protrusion 205 and the second retaining protrusion 206.
[0049] The multi-level retaining protrusions (with increasing amplitude design) on the side of the retaining part 202 cooperate with the retaining groove 106 to form a progressive retaining effect. The first retaining protrusion and the second retaining protrusion 206 further enhance the retaining force when the vibration intensifies, effectively resisting the displacement tendency of the terminal caused by high frequency vibration, ensuring that the terminal maintains the designed position for a long time, and improving the vibration resistance performance.
[0050] The protruding structure on the side of the retaining part 202 forms a retaining engagement with the retaining groove 106, ensuring that the spring arm part 201 is always in the preset working position, and avoiding contact failure caused by the offset of the docking terminal 200.
[0051] The fixing base 100 has connecting grooves 105 on both opposite sides, and welding fixing pieces for welding are held and connected in the connecting grooves 105.
[0052] The welding fixing piece is connected to the fixing base 100 through the connecting groove 105, providing a support point for the entire connector, and the fixing base 100 can be connected to the external mounting end by welding.
[0053] In the specific implementation process, the fixing seat 100 is welded to the circuit board by welding fixing pieces. The fixing seat 100 is the female seat of the board-to-board connector.
[0054] The first elastic part 2013 and the second elastic part 2014 are bent and extended through the inward folding and docking gap 204, so that the first elastic part 2013 and the second elastic part 2014 form an angle under bending.
[0055] The inward folding structure of the spring arm increases the elastic deformation space, giving the terminal a greater buffer margin under vibration and impact. The included angle formed by the inward fold can disperse stress concentration, preventing the spring arm from undergoing plastic deformation due to repeated bending, while maintaining a constant contact pressure on the contact element, ensuring stable contact resistance in high-frequency vibration environments, and improving signal transmission reliability.
[0056] In the specific implementation process, the internal bending design improves the combined vibration resistance of the mating terminal 200 and the mating part, and the setting of the first contact protrusion 2015 and the second contact protrusion 2016 ensures the contact stability of the connector under complex working conditions.
[0057] The board-to-board connector in this embodiment is a female-end board-to-board connector. Through the synergistic effect of the dual contact points, the spring arm portion 201, the bent elastic portion folded inward on the spring arm portion 201, and the protruding structure of the retaining portion 202, the connector constructs multiple anti-vibration mechanisms: the dual contact points increase the contact area and contact effect with the mating parts, and ensure good contact between the mating terminal 200 and the external mating parts, achieving high-precision positioning stability and reliability. The first elastic portion 2013 and the second elastic portion 2014 formed by bending extend the length of the first spring arm 2011 and the second spring arm 2012, thereby expanding the elastic deformation range of the mating terminal 200 and improving the working reliability of the connector in complex vibration environments.
[0058] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.
Claims
1. A dual contact pad board-to-board connector comprising a fixed housing, characterized by: The fixed seat is provided with a butt joint groove, a protruding plug-in protrusion is arranged in the butt joint groove, the bottom of the fixed seat is provided with a plug-in slot in communication with the butt joint groove, and the fixed seat is connected with a plurality of butt joint terminals through the plug-in slot; The butt joint terminal comprises a elastic arm part, a holding part and a terminal welding part, the butt joint terminal is matched and plugged into the plug-in slot, the elastic arm part of the butt joint terminal extends to the inner wall of the butt joint groove through the plug-in slot, the elastic arm part comprises a first elastic arm and a second elastic arm, the first elastic arm and the second elastic arm are oppositely arranged on the holding part, a butt joint gap is arranged between the first elastic arm and the second elastic arm, the end of the first elastic arm and the second elastic arm close to the holding part is respectively formed with a first elastic part and a second elastic part through bending, the inner side of the first elastic arm and the second elastic arm is respectively provided with a first contact protrusion and a second contact protrusion, the terminal welding part is arranged at the bottom of the holding part and is exposed at the bottom of the fixed seat, and the side of the holding part is provided with a protruding structure for clamping.
2. The dual contact board-to-board connector of claim 1, wherein: The butt joint groove is arranged at the top of the fixed seat, and the plug-in protrusion is arranged at the middle of the butt joint groove, so that the plug-in protrusion is distributed between the butt joint grooves.
3. The dual contact board-to-board connector of claim 2, wherein: The plug-in slot comprises a clamping part for matching and connecting the holding part and a limiting groove in communication with the clamping part, and the floating terminal is matched and connected to the plug-in slot from the bottom of the fixed seat, the limiting groove comprises a first groove and a second groove, and the first elastic arm and the second elastic arm pass through the clamping part and are matched and connected to the first groove and the second groove respectively.
4. The dual contact board-to-board connector of claim 1, wherein: The first elastic arm and the second elastic arm are symmetrically arranged, and the ends of the first elastic arm and the second elastic arm extend to the slot of the butt joint groove.
5. The dual contact board-to-board connector of any one of claims 1-4, wherein: The protruding structure comprises a first clamping protrusion and a second clamping protrusion arranged in sequence, the first clamping protrusion and the second clamping protrusion are arranged on one side of the holding part, the protruding amplitudes of the first clamping protrusion and the second clamping protrusion increase in sequence, and the inner side of the clamping part is provided with a clamping groove for matching the first clamping protrusion and the second clamping protrusion.
6. The dual contact board-to-board connector of any one of claims 1-4, wherein: The connecting slots are arranged on both sides of the fixed seat, and welding fixing plates for welding are clamped and connected in the connecting slots.
7. The dual contact board-to-board connector of any one of claims 1-4, wherein: The first elastic part and the second elastic part are bent and extended to the butt joint gap through inner folding, so that the first elastic part and the second elastic part form an included angle under bending.