CN114434392A - Installation method of inclined coil spring in electrical connecting piece - Google Patents
Installation method of inclined coil spring in electrical connecting piece Download PDFInfo
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- CN114434392A CN114434392A CN202111621362.9A CN202111621362A CN114434392A CN 114434392 A CN114434392 A CN 114434392A CN 202111621362 A CN202111621362 A CN 202111621362A CN 114434392 A CN114434392 A CN 114434392A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000009434 installation Methods 0.000 title abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000011900 installation process Methods 0.000 claims abstract description 3
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- 238000007906 compression Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract description 3
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- 238000001746 injection moulding Methods 0.000 description 7
- 235000014676 Phragmites communis Nutrition 0.000 description 5
- 230000000747 cardiac effect Effects 0.000 description 5
- XBWAZCLHZCFCGK-UHFFFAOYSA-N 7-chloro-1-methyl-5-phenyl-3,4-dihydro-2h-1,4-benzodiazepin-1-ium;chloride Chemical compound [Cl-].C12=CC(Cl)=CC=C2[NH+](C)CCN=C1C1=CC=CC=C1 XBWAZCLHZCFCGK-UHFFFAOYSA-N 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
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- 238000009125 cardiac resynchronization therapy Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 238000000465 moulding Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
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- Manufacturing Of Electrical Connectors (AREA)
Abstract
The invention provides a method for installing an inclined ring spring in an electrical connector, which adopts a tool comprising a supporting mandrel and an installer which are matched with each other; the specific installation process is as follows: step 1, inserting a support mandrel into an electrode cavity channel of a connector; step 2, radially flattening the inclined ring spring into an elliptical shape, and obliquely inserting one end of a sharp head of the elliptical inclined ring spring into an inner cavity of a chuck of the clamping tube; after one end of the tip of the inclined ring spring abuts against the end face of the pressure head of the pressure rod, the tip of the other end of the inclined ring spring in an oval shape is clamped into the convex hull of the gripper; step 3, aligning the chuck provided with the inclined ring spring with a thin rod exposed outside the connector and supporting a mandrel, and slowly inserting the chuck into an electrode cavity of the connector; pushing a pressure rod on the mounting device, pushing the inclined ring spring into a cavity of the electrical connecting piece and pressing the inclined ring spring into the groove; and 4, taking the installer and the support mandrel out of the electrode cavity. The invention can effectively improve the installation power and efficiency of the inclined coil spring and prevent the damage and the insulation failure of the inclined coil spring.
Description
Technical Field
The invention belongs to the field of medical instrument manufacturing, and particularly relates to a method for installing an inclined coil spring in an electrical connector.
Background
An implantable cardiac pacemaker is an electronic therapeutic apparatus implanted in a patient for a long time, and electric pulses which are provided with energy by a battery are distributed by a pulse generator, and conducted by an electrode lead wire, the cardiac muscle contacted by an electrode is stimulated, so that the heart is excited and contracted, and the aim of treating the cardiac dysfunction caused by certain arrhythmia is fulfilled. The pulse generator of the cardiac pacemaker is mainly composed of a connector made of a high polymer material with biocompatibility and a metal shell. An electric connecting piece is arranged in the electrode cavity channel in the connector, and the electric connecting piece is conducted with a connector ring at the tail end of an electrode lead inserted into the electrode cavity channel, so that the electric pulse sent by the pulse generator can be conducted to the cardiac muscle, and the purposes of monitoring and treatment are achieved.
In order to ensure the reliability of the connection between the pulse generator and the electrode lead, the electrical connector in the connector is not directly contacted with the connector ring at the tail end of the electrode lead, but an annular metal reed or a bevel ring spring is arranged in the electrical connector to enhance the connection stability of the electrical connector and the electrode lead. After the annular reed is arranged in the electric connecting piece, the reed is generally welded to ensure that the connection between the elastic sheet and the electric connecting piece is firm; the inclined ring spring is arranged in the mounting groove of the electric connecting piece and can be stably connected without welding. Chinese patent publication No. CN 106025646 a discloses a structure for connecting positive and negative electrodes of a cardiac pacemaker, in which a ring-shaped reed structure is used inside an electrical connector, and six reeds are used. That is, only six contacts capable of conducting with the inserted electrode wire are provided. And the canted coil spring has up to tens of contacts that are in electrical communication with the electrode leads. Therefore, the inclined coil spring is more advantageous than the ring spring in reliability of the electrical contact.
The existing forming process of the connector mainly comprises the following steps: the injection molding process comprises the steps of high polymer material injection molding, high polymer material glue pouring molding, injection molding and glue pouring process, and then the molded injection molding piece is wrapped by the glue pouring process. The existing inclined coil spring assembly process generally comprises the steps of firstly assembling an inclined coil spring into a groove in an electric connector, forming an electric connecting assembly by the inclined coil spring and the groove, and then sealing the electric connecting assembly in a connector by using an injection molding or glue pouring process. Chinese patent publication No. CN 213616497U provides an assembling tool for a canted coil spring. And pressing the radial flattened inclined ring spring into the mounting groove of the electrical connecting piece through the guide-in seat with the reducing cavity by utilizing the ejector rod. The assembly tool is only suitable for being used under the condition that the electrical connecting piece is not installed in the connector.
The central aperture of the inclined ring spring is slightly smaller than the aperture of the cavity of the electric connecting piece, the cavity of the electric connecting piece also forms a part of the electrode cavity of the connector, and after the inclined ring spring is arranged in the groove of the electric connecting piece, the middle section of the cavity is narrowed to block the forming of the whole electrode cavity. The process sequence of assembling the inclined coil spring and then forming the connector has several defects: a certain resistance exists between the die pin and the inclined ring spring, and the penetration of the die pin is influenced; the coaxiality of the die pin and the inclined ring spring is deviated, and the inclined ring spring is possibly damaged due to uneven compression caused by the penetration of the die pin; the presence of the canted coil spring may have an effect on the mold seal structure: in the injection molding or glue filling process of the connector, insulating glue can enter the surface of the inclined ring spring along the gap between the inner wall of the cavity of the electrical connecting piece and the mold pin to influence the conductivity of the spring.
In order to solve the defects, the inclined coil spring is arranged after the connector is molded and cured. However, after the connector is formed and cured, a certain distance exists between the inclined ring spring mounting groove in the electrical connector and the electrode cavity opening, and the electrode cavity between the inclined ring spring mounting groove and the electrode cavity opening is also in a multi-stage reducing design mode, so that the inclined ring spring is very difficult to mount by bare hands, a special tool is not used, and the inclined ring spring is easy to cause permanent deformation and scrap.
Disclosure of Invention
The invention provides an installation method of an inclined coil spring in an electrical connecting piece, the designed tool is simple in structure and easy to operate, the inclined coil spring can be installed after a connector of the electrical connecting piece is formed, the installation power and efficiency of the inclined coil spring can be effectively improved, and the damage and insulation failure of the inclined coil spring are prevented.
A method for installing an inclined ring spring in an electric connecting piece is used for assembling the inclined ring spring into a groove in a cavity channel of the electric connecting piece, the electric connecting piece is arranged in a connector, and an adopted tool comprises a supporting mandrel and an installer which are matched with each other;
the mounting device comprises a clamping pipe and a pressure rod inserted in the clamping pipe, a guide cavity channel is arranged in the clamping pipe, and a chuck communicated with the guide cavity channel is arranged at the front end of the clamping pipe; the chuck comprises three-piece grippers, a U-shaped groove is arranged between every two adjacent piece grippers, and a convex hull is arranged on the inner edge of the front end of at least one piece gripper; the pressure lever comprises a pressure head at the front part and a guide post at the rear part, and a cavity extending from the pressure head to the guide post is arranged in the pressure lever; the outer diameter of the pressure head is slightly smaller than the inner diameter of the chuck, and the outer diameter of the guide column is slightly smaller than the diameter of the guide cavity;
the supporting mandrel comprises a fixed section, a supporting section and a thin rod; the rear end face of the supporting section is used as a supporting face of the front end face of the groove; the thin rod is matched with the cavity of the pressure rod;
the specific installation process is as follows:
and 4, taking the installer and the support mandrel out of the electrode cavity.
The invention aims to solve the problem that an inclined coil spring is inconvenient to install after an electric connecting piece for medical equipment is packaged in a high polymer material in the prior art, and simultaneously solves the problems of the defects of unfavorable assembly of a mould pin, damage of the inclined coil spring, insulation failure of the inclined coil spring and the like possibly caused by an inclined coil spring installation mode in the prior art, so that the tool for quickly and effectively installing the inclined coil spring into the groove of the electric connecting piece after a connector is molded and cured and the method for installing the inclined coil spring by using the tool are provided.
Further, in the step 1, when the fixing section of the support mandrel is fixed with the bottom of the electrode cavity, the height difference between the rear end face of the support section and the front end face of the groove of the electrical connector is within +/-0.06 mm.
The specific process of the step 3 is as follows:
aligning the chuck provided with the inclined ring spring to a thin rod exposed outside the connector and supporting the mandrel, and allowing the thin rod to penetrate through a central hole of the inclined ring spring in the inner cavity of the chuck and continuously insert into a cavity of the pressure rod; when the end surface of the chuck props against the rear end surface of the electrical connector in the electrode cavity, the installer reaches the designated position;
a pressure rod on the installer is pushed slowly, and a pressure head of the pressure rod can push the inclined ring spring to pass through a convex closure on the gripper and enter a cavity channel of the electrical connecting piece from an inner cavity of the chuck;
when the oblique coil spring collides the rear end face of the supporting core shaft, the oblique coil spring is continuously pushed along with the pressure head of the pressure rod, the oblique coil spring colliding one end of the rear end face can firstly slide into the groove of the electrical connecting piece, and the other end of the oblique coil spring abutting against the end face of the pressure head slides into the groove.
Further, in the frock of adoption, the support section of support dabber adopts conical surface structure, and the one end diameter that is close to the canned paragraph on the support section is less than the one end diameter that is close to the pin, and the tapering of conical surface is 1: 5.
the diameter of the large end of the supporting section is 0.2mm smaller than the diameter of a cavity of the electric connecting piece, and is 0.1mm larger than the central aperture of the inclined coil spring.
Preferably, the outer wall of the clamping pipe is symmetrically provided with waist-shaped limiting grooves along the axial direction, the guide post is fixed with a limiting pin through a pin hole, and the guide post is matched with the two limiting grooves for limiting through the limiting pin.
Through setting up spacer pin and spacing groove, steerable depression bar is when removing to the maximum position, and the pressure head end face of depression bar is 0.1mm apart from the distance of electric connecting piece recess rear end face, can prevent to lead to damaging under the condition of unable observation oblique ring spring position in the electric connecting piece chamber way, the depression bar excessively extrudes oblique ring spring.
Furthermore, the length of the limiting pin is greater than the diameter of the pressure rod and smaller than the diameter of the clamping pipe; after the limiting pin penetrates through the pin hole of the pressing rod, the distance between the end faces of the limiting pin at two ends and the central axis of the pressing rod is equal.
Preferably, the rear end of the clamping pipe is provided with a sinking platform in the guide cavity, the rear end of the guide post is provided with a rod handle, the rear part of the guide post is sleeved with a return spring, one end of the return spring is abutted against the bottom surface of the sinking platform, and the other end of the return spring is abutted against a tail cone surface on the rod handle.
Through setting up reset spring, can accomplish the installation back of a spring to one side, let the pressure lever reset voluntarily, improve the installation effectiveness of spring to one side.
Preferably, the inner edge of the front end of each claw on the chuck is provided with a convex hull, so that the inclined ring spring can be effectively prevented from being ejected from the inner cavity of the chuck when the inclined ring spring is restored to be circular from an oval shape.
Preferably, the width of the U-shaped groove on the chuck is 1/8-1/10 of the outer perimeter of the chuck, so that the inclined coil spring can be effectively prevented from rotating when the inclined coil spring is pre-installed in an inner cavity of the chuck.
Compared with the prior art, the invention has the following beneficial effects:
1. the mounting tool has the advantages of small number of parts, simple structure and easy processing; the self-assembly of the tool is simple and easy to operate, and the tool can be assembled only by fixing one limiting pin.
2. The tool has high installation efficiency of the inclined coil spring, and after the inclined coil spring is installed for one time, the pressure rod in the installer can automatically reset, so that the inclined coil spring can be pre-installed for the next time.
3. The tool is provided with the thin rod of the supporting mandrel, the inclined ring spring can always slide in the cavity channel in an inclined state under the guiding action of the thin rod, the inclined ring spring can be ensured to be smoothly installed in a groove of the cavity channel of the electric connecting piece, and the installation success rate of the inclined ring spring is effectively improved.
4. The chuck is provided with the three-piece gripper and the U-shaped groove, and the U-shaped groove can effectively prevent the inclined ring spring from rotating when the inclined ring spring is pre-installed and enters the inner cavity of the chuck; the hand grip can be opened outwards for a certain angle under a certain acting force, so that the inclined ring spring can be conveniently pre-installed in the inner cavity of the chuck.
5. By adopting the method, the process flow sequence for installing the inclined ring spring can be optimized, the connector can be subjected to injection molding or glue pouring molding firstly, and then the inclined ring spring is installed, so that the risk of damage to the inclined ring spring can be reduced.
Drawings
FIG. 1 is a perspective view of an installer inserted into an electrode channel of a pulse generator;
FIG. 2 is a schematic structural view of the electrical connector;
FIG. 3 is a cross-sectional view of the electrical connector;
FIG. 4 is a schematic diagram of the tooling structure for the installation of the canted coil spring of the present invention;
FIG. 5 is a structural view of a support mandrel of the present invention;
FIG. 6 is an exploded view of the mounter in the present invention;
fig. 7 is a sectional view of the mounter;
FIG. 8 is a schematic structural view of a canted coil spring in its natural configuration;
FIG. 9 is a schematic view of the radially flattened oval configuration of the canted coil spring;
FIG. 10 is an enlarged fragmentary view of the canted coil spring installed in the mounting fixture;
FIG. 11 is a partial cross-sectional view of a pulse generator electrode channel;
FIG. 12 is a partial cross-sectional view of the installer inserted into the electrode channel of the pulse generator;
fig. 13 is a partial cross-sectional view of an installer installing the canted coil spring in place.
Description of reference numerals: 1 supporting a mandrel; 1-1 fixing the end face; 1-2 fixed segment; 1-3 support sections; 1-4 rear end faces; 1-5 slender rods; 2, mounting a device; 3 clamping the tube; 3-1, a chuck; 3-2U-shaped grooves; 3-3, gripping; 3-4 convex hulls; 3-5 limiting grooves; 3-6 first arc surface; 3-7 second arc surface; 3-8, sinking a platform; 3-9 guiding the cavity; 4, pressing a rod; 4-1 pressure head; 4-2 pin holes; 4-3 of a handle; 4-4 tail cones; 4-5 guide posts; 4-6 cavities; 5, limiting pins; 5-1 limiting pin column surface; 5-2 limiting pin end face; 6, a return spring; 7 electrical connectors; 7-1 cavity channel; 7-2 grooves; 7-3, the front end surface of the groove; 7-4, the rear end face of the groove; 8, a bevel ring spring; 9 electrode channels; 9-1 first-stage cavity channel; 9-2 second-stage cavity channels; 9-3 third-stage cavity channels; 9-4 fourth-stage cavity channel; 9-5 fifth-stage cavity channels; 10 a pulse generator; 11 connecting heads.
Detailed Description
The invention will be described in further detail below with reference to the drawings and examples, which are intended to facilitate the understanding of the invention without limiting it in any way.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, 2, 3 and 8, in order to ensure the reliability of the connection of the pulse generator 10 with the electrode lead, the electrical connector 7 in the connector 11 is not directly contacted with the connector ring at the tail end of the electrode lead, and a canted coil spring 8 is arranged in the electrical connector to enhance the connection stability of the electrical connector and the electrode lead, namely, the canted coil spring 8 is assembled in a groove 7-2 in a cavity 7-1 of the electrical connector 7. The front end surface and the rear end surface of the groove 7-2 are respectively a groove front end surface 7-3 and a groove rear end surface 7-4.
As shown in fig. 4, the present invention provides an installation tool for a canted coil spring, which includes a support mandrel 1 and an installer 2. As shown in fig. 5, the support mandrel 1 is composed of three sections of rod bodies with different diameters, namely a fixed section 1-2, a support section 1-3 and a thin rod 1-5.
The front end of the fixed section 1-2 is a fixed end face 1-1, the fixed end face 1-1 can control the insertion depth of the support mandrel 1 in the electrode cavity 9, and the fixed section 1-2 is in clearance fit with a fifth-stage cavity 9-5 of the electrode cavity 9 to limit the inclination and the shaking of the support mandrel 1 in the electrode cavity 9.
The middle section of the support mandrel is provided with a support section 1-3, the support section 1-3 is of a conical surface structure, and the rear end face of the support section is used as a support surface. The diameter of the large end of the support section 1-3 is 0.2mm smaller than the diameter of the cavity of the electric connecting piece 7 and 0.1mm larger than the central aperture of the inclined coil spring 8. After the inclined coil spring 8 is installed, when the supporting mandrel 1 is drawn out from the central inner hole of the inclined coil spring 8, the large end of the supporting section 1-3 cannot have an overlarge extrusion effect on the inclined coil spring 8. The rear end face 1-4 of the support section 1-3 is slightly higher than the front end face 7-3 of the groove of the electric connecting piece 7 by 0.05mm or the two planes are flush. When the inclined coil spring 8 obliquely collides with the rear end face 1-4 in the cavity 7-1 of the electric connecting piece 7, the inclined coil spring can smoothly slide into the groove 7-2.
The rear section of the supporting mandrel 1 is a thin rod 1-5, and the thin rod 1-5 can control the inclined ring spring 8 to slide into the groove 7-2 in an inclined state in the cavity 7-1 of the electric connecting piece 7. After the installation of the helical coil spring 8 is completed, the support mandrel 1 can be removed from the electrode channel 9 by means of the thin rods 1-5 exposed outside the electrode channel 9.
As shown in fig. 6 and 7, the mounter 2 includes four parts of a clamping pipe 3, a pressing rod 4, a stopper pin 5, and a return spring 6. The pressure lever 4 is arranged in a guide cavity channel 3-9 of the clamping tube 3, a guide post 4-5 of the pressure lever 4 is in clearance fit with the guide cavity channel 3-9 of the clamping tube 3, and the pressure lever 4 can linearly slide in the guide cavity channel 3-9 for the maximum displacement L.
In order to realize the connection of the clamping pipe 3 and the pressure rod 4, the mounting device 2 is provided with a limiting pin 5. The limiting pin 5 is in interference fit with a pin hole 4-2 arranged on the pressure lever 4. The limiting pin 5 comprises a limiting pin cylindrical surface 5-1 and a limiting pin end surface 5-2, and when no certain external force vertically acts on the limiting pin end surface 5-2, the limiting pin 5 cannot axially displace in the pin hole 4-2 on the pressure rod 4. The length of the limiting pin 5 is larger than the diameter of the pressure rod 4, but smaller than the diameter of the clamping pipe 3. After the limiting pin 5 penetrates through the pin hole 4-2 of the pressure rod 4, the distances between the end faces 5-2 of the limiting pin at the two ends and the central axis of the pressure rod 4 are equal.
In order to prevent the compression bar 4 from rotating in the clamping tube 3 and control the moving distance of the compression bar 4 in the clamping tube 3, the clamping tube 3 of the mounting device 2 is provided with a kidney-shaped limiting groove 3-5. The two ends of the limiting groove 3-5 are a first arc surface 3-6 and a second arc surface 3-7.
As shown in fig. 6, the groove width of the limiting groove 3-5 is 0.1mm larger than the diameter of the limiting pin 5, and the rotation of the pressure lever 4 in the clamping tube 3 can be effectively prevented after the limiting pin 5 is inserted into the limiting groove 3-5; the effective length of the limiting grooves 3-5 is equal to the maximum displacement L of the limiting pin 5, namely the displacement of the pressure rod 4 in the guide channels 3-9 of the clamping tube 3 is L.
In order to realize the reset of the pressure lever 4 after the displacement in the guide channels 3-9 of the clamping tube 3, the mounting device 2 is provided with a reset spring 6. As shown in fig. 4, 6 and 7, the return spring 6 is installed between the tail of the clamping tube 3 and the lever handle 4-3 of the pressure lever 4. A guide cavity 3-9 at the tail part of the clamping tube 3 is provided with a sinking platform 3-8, and a rod handle 4-3 of the pressure rod 4 is provided with a tail conical surface 4-4. The distance between the bottom surface of the sinking platform 3-8 and the tail cone surface 4-4 is L1, the length of the return spring 6 in a natural state is L2, and L < L1< L2. The return spring 6 is installed on the mounting device 2 and then is in a certain compression state.
To perform the pre-mounting work of the canted coil spring 8 in the mounter 2, the grip pipe 3 of the mounter 2 is provided with a collet 3-1. As shown in fig. 6 and 10, the chuck 3-1 is in a three-piece handle 3-3 structure, and a U-shaped groove 3-2 is arranged between every two handles 3-3, and the total number is three. The inner edge of the front end of one of the grippers 3-3 is provided with a convex hull 3-4, and the convex hull 3-4 can limit the inclined ring spring 8 from being popped out from the inner cavity of the chuck 3-1 when the inclined ring spring is restored to be circular from an oval shape.
The installation tool is adopted in the installation method of the inclined ring spring in the electric connecting piece, and the installation method specifically comprises the following steps:
And 2, as shown in fig. 8, 9 and 10, radially flattening the inclined coil spring 8 into an oval shape, wherein one end of the sharp head of the oval inclined coil spring 8 is obliquely inserted into the inner cavity of the chuck 3-1 of the clamping tube 3 of the mounter 2. After one end of the pointed end of the inclined ring spring 8 props against the end face of the pressure head 4-1 of the pressure rod 4, the pointed end of the other end of the inclined ring spring 8 in an oval shape is clamped into the handle 3-3 with the convex hull 3-4 at the head part of the clamping tube 3. By poking the handle 3-3 with the convex hull 3-4 to a certain angle to the outside of the clamping tube, the inclined ring spring 8 is more easily supported by the convex hull 3-4 on the handle 3-3 and is not ejected from the inner cavity of the clamping head 3-1. When the clamp head 3-1 of the clamping pipe 3 is inserted into the oval inclined ring spring 8 in an inclined mode, the oval inclined ring spring 8 needs to slide into the U-shaped groove 3-2 with the convex hull 3-4 and the handles 3-3 opposite to each other, and the U-shaped groove 3-2 can prevent the inclined ring spring 8 from rotating in the inner cavity of the clamp head 3-1. The inclined ring spring 8 is arranged in the inner cavity of the chuck 3-1 and can slightly extrude the inner wall of the chuck 3-1 after being released, and the three-jaw gripper 3-3 of the chuck 3-1 cannot deform by expanding outwards due to small acting force. The inclined ring spring 8 is in an elliptical shape in the inner cavity of the clamping head 3-1 of the clamping pipe 3 of the mounting device 2 and is obliquely propped between the end surface of the pressure head 4-1 of the pressure lever 4 and the convex hull 3-4 of the gripper 3-3.
And 4, after the acting force on the lever handle 4-3 of the pressure lever 4 is released, the pressure lever 4 and the limiting pin 5 can reset from the second arc surface 3-7 of the limiting groove 3-5 of the clamping pipe 3 to the first arc surface 3-6 of the initial position of the limiting pin 5 under the action of the restoring force of the reset spring 6 of the pressure lever 4. The applicator 2 is then withdrawn from the electrode channel 9. Finally, the support mandrel 1 in the electrode channel 9 of the connector 11 is removed.
The tool and the method for installing the inclined ring spring are suitable for but not limited to an implanted cardiac pacemaker, an Implanted Cardioverter Defibrillator (ICD), a cardiac resynchronization therapy defibrillator (CRT-D), a cardiac resynchronization therapy pacemaker (CRT-P), an implanted brain pacemaker, an implanted spinal cord stimulator, an implanted sacral nerve stimulator, an implanted vagus nerve stimulator and the like.
The technical solutions and advantages of the present invention have been described in detail with reference to the above embodiments, it should be understood that the above embodiments are only specific examples of the present invention and should not be construed as limiting the present invention, and any modifications, additions and equivalents made within the scope of the principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for mounting an inclined coil spring in an electric connecting piece is used for assembling the inclined coil spring (8) into a groove (7-2) in a cavity (7-1) of the electric connecting piece (7), the electric connecting piece (7) is arranged in a connector (11), and the method is characterized in that the adopted tool comprises a supporting mandrel (1) and an installer (2) which are matched with each other;
the mounting device (2) comprises a clamping pipe (3) and a pressure rod (4) inserted in the clamping pipe (3), a guide cavity (3-9) is arranged inside the clamping pipe (3), and a chuck (3-1) communicated with the guide cavity (3-9) is arranged at the front end of the clamping pipe (3); the chuck (3-1) comprises three-piece grippers (3-3), a U-shaped groove (3-2) is arranged between every two adjacent piece grippers (3-3), and a convex hull (3-4) is arranged on the inner edge of the front end of at least one piece gripper (3-3); the pressure lever (4) comprises a pressure head (4-1) at the front part and a guide column (4-5) at the rear part, and a cavity (4-6) extending from the pressure head (4-1) to the guide column (4-5) is arranged in the pressure lever (4); the outer diameter of the pressure head (4-1) is slightly smaller than the inner diameter of the chuck (3-1), and the outer diameter of the guide column (4-5) is slightly smaller than the diameter of the guide cavity (3-9);
the support mandrel (1) comprises a fixed section (1-2), a support section (1-3) and a thin rod (1-5); the rear end face (1-4) of the supporting section (1-3) is used as a supporting face of the front end face (7-3) of the groove (7-2); the thin rod (1-5) is matched with the cavity (4-6) of the pressure rod (4);
the specific installation process is as follows:
step 1, inserting a support mandrel (1) into an electrode cavity (9) of a connector (11), fixing a fixing section (1-2) of the support mandrel (1) with the bottom of the electrode cavity (9), and taking a rear end face (1-4) of the support section (1-3) as a support face of a front end face (7-3) of a groove (7-2) at the moment;
step 2, radially flattening the inclined ring spring (8) into an oval shape, and obliquely inserting one end of a pointed end of the oval inclined ring spring (8) into an inner cavity of a chuck (3-1) of the clamping tube (3); after one end of the tip of the inclined ring spring (8) props against the end face of the pressure head (4-1) of the pressure rod (4), the tip of the other end of the elliptic inclined ring spring (8) is clamped into the convex hull (3-4) of the gripper (3-3);
step 3, aligning a chuck (3-1) provided with an inclined ring spring (8) with a thin rod (1-5) exposed outside the connector (11) and supporting the mandrel (1), and slowly inserting the chuck into an electrode cavity (9) of the connector (11); pushing a pressure lever (4) on the mounting device (2), pushing the inclined ring spring (8) into a cavity (7-1) of the electrical connecting piece (7) and pressing the inclined ring spring into the groove (7-2);
and 4, taking the mounter (2) and the support mandrel (1) out of the electrode cavity (9).
2. The method for mounting the canted coil spring in the electrical connector according to claim 1, wherein in step 1, when the fixed section (1-2) of the support mandrel (1) is fixed to the bottom of the electrode channel (9), the height difference between the rear end surface (1-4) of the support section (1-3) and the front end surface (7-3) of the groove (7-2) of the electrical connector (7) is within ± 0.06 mm.
3. The method for installing the canted coil spring in the electrical connector according to claim 1, wherein the specific process of step 3 is:
aligning a chuck (3-1) provided with an inclined ring spring (8) to a thin rod (1-5) exposed outside a connector (11) and supporting a mandrel (1), and enabling the thin rod (1-5) to penetrate through a central hole of the inclined ring spring (8) in an inner cavity of the chuck (3-1) and to be continuously inserted into a cavity (4-6) of a compression bar (4); when the end surface of the chuck (3-1) is propped against the rear end surface of the electrical connector (7) in the electrode cavity (9), the installer (2) reaches the designated position;
a pressure rod (4) on the mounting device (2) is pushed slowly, a pressure head (4-1) of the pressure rod (4) can push an inclined ring spring (8) to cross a convex hull (3-4) on the gripper (3-3) and enter a cavity channel (7-1) of the electrical connecting piece (7) from an inner cavity of the gripper (3-1);
when the inclined coil spring (8) collides with the rear end face (1-4) of the support core shaft (1), the inclined coil spring (8) is continuously pushed along with the pressure head (4-1) of the pressure rod (4), the inclined coil spring (8) colliding with one end of the rear end face (1-4) slides into the groove (7-2) of the electrical connecting piece (7) first, and the inclined coil spring (8) abuts against the other end of the end face of the pressure head (4-1) and then slides into the groove (7-2).
4. The method for mounting a canted coil spring in an electrical connector according to claim 1, wherein the support section (1-3) of the support mandrel (1) has a conical surface structure, the diameter of the end of the support section (1-3) near the fixed section (1-2) is smaller than the diameter of the end near the slender rod (1-5), and the taper of the conical surface is 1: 5.
5. the method for mounting a canted coil spring in an electrical connector according to claim 4, wherein the support section (1-3) has a large end diameter 0.2mm smaller than the diameter of the channel (7-1) of the electrical connector (7) and 0.1mm larger than the diameter of the center bore of the canted coil spring (8).
6. The method for installing the canted coil spring in the electrical connector according to claim 1, wherein the clamping tube (3) has a waist-shaped limiting groove (3-5) axially symmetrically formed in an outer wall thereof, the guide post (4-5) is fixed with a limiting pin (5) through a pin hole (4-2), and the guide post (4-5) is limited by the limiting pin (5) in cooperation with the two limiting grooves (3-5).
7. The method for mounting a canted coil spring in an electrical connector according to claim 6, wherein the length of the limit pin (5) is greater than the diameter of the pressure rod (4) and less than the diameter of the clamping tube (3); after the limiting pin (5) penetrates through the pin hole (4-2) of the pressure lever (4), the distances between the limiting pin end faces (5-2) at the two ends and the central axis of the pressure lever (4) are equal.
8. The method for mounting the inclined coil spring in the electrical connecting piece according to claim 6, wherein a sinking platform (3-8) is arranged in a guide cavity (3-9) at the rear end of the clamping tube (3), a rod handle (4-3) is arranged at the rear end of the guide column (4-5), a return spring (6) is sleeved at the rear part of the guide column (4-5), one end of the return spring abuts against the bottom surface of the sinking platform (3-8), and the other end of the return spring abuts against a tail conical surface (4-4) on the rod handle (4-3).
9. The method for mounting a canted coil spring in an electrical connector according to claim 1, wherein the front inner edge of each of the gripping arms (3-3) on the collet (3-1) is provided with a convex hull (3-4).
10. The method for mounting a canted coil spring in an electrical connector according to claim 1, wherein the U-shaped groove (3-2) in the collet (3-1) has a width 1/8 to 1/10 of the outer circumference of the collet (3-1).
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| CN202111621362.9A CN114434392B (en) | 2021-12-28 | 2021-12-28 | Installation method of bevel ring spring in electric connector |
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| CN202111621362.9A CN114434392B (en) | 2021-12-28 | 2021-12-28 | Installation method of bevel ring spring in electric connector |
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| CN114434392B CN114434392B (en) | 2024-02-20 |
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| CN113084749A (en) * | 2021-04-12 | 2021-07-09 | 浙江银轮机械股份有限公司 | Sealing ring installer |
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|---|---|---|---|---|
| US5050282A (en) * | 1990-08-27 | 1991-09-24 | The United States Of America As Represented By The Secretary Of The Navy | O-ring insertion tool |
| US5862578A (en) * | 1997-03-20 | 1999-01-26 | Aeroquip Corporation | Insertion tool |
| US5909909A (en) * | 1997-09-08 | 1999-06-08 | Glauber; Carl J. | System for installing O-ring |
| US9144898B1 (en) * | 2012-12-18 | 2015-09-29 | Winford Davis, Jr. | Faucet seat and spring inserter |
| CN106181857A (en) * | 2016-07-09 | 2016-12-07 | 东莞市华睿电子科技有限公司 | A kind of cast elastic component assembling device and method |
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| CN114434392B (en) | 2024-02-20 |
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Denomination of invention: Installation method of inclined coil spring in electrical connectors Granted publication date: 20240220 Pledgee: Agricultural Bank of China Limited Hangzhou Yuhang Branch Pledgor: Danyuan medical technology (Hangzhou) Co.,Ltd. Registration number: Y2024980016105 |
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