CN210379489U - Terminal and terminal connecting device and motor with same - Google Patents

Abstract

The present disclosure provides a terminal and a terminal connection device having the same, a motor, the terminal being made of a conductive material for electrically connecting a pin of the motor with an external connector, the terminal including: a first terminal portion including a first body defining a first insertion direction for inserting the pin, and an elastic contact extending from the first body and configured to be elastically deformed with the insertion of the pin to apply a contact force on the pin; a second terminal portion including a second body defining a second insertion direction into the external connector; and a bent portion through which the first terminal portion and the second terminal portion are connected such that the first insertion direction is substantially perpendicular to the second insertion direction.

Description

Terminal and terminal connecting device and motor with same

Technical Field

The utility model relates to a terminal and terminal connecting device, motor that have this terminal.

Background

The small-sized motor is an important basic product widely applied in various fields such as factory automation, home life automation, office automation and the like, and the common small-sized motor is divided into a lead motor and a leadless motor according to different connection modes of leads. A leaded motor means that the leads are connected directly to the respective terminals to provide current to the motor stator windings, a so-called direct connection. The leadless motor is only provided with a connector port, and the lead is connected with the motor through a matching interface as a separate part, namely, the indirect connection mode is adopted.

Generally, in the scheme of the leaded motor, a structure that a lead is welded with a circuit board (PCB) first and then the PCB is welded to a contact pin corresponding to a motor winding is adopted, while the leadless motor is a structure that an external connector is inserted into the PCB and the PCB is welded to the contact pin corresponding to the motor winding.

However, in both the leaded motor and the leadless motor, the intermediate transition is connected by means of a PCB. This PCB board connection method causes a series of problems: firstly, the problem of motor circuit disconnection caused by unsmooth electrical connection inside the PCB is solved; secondly, the PCB adopts at least one welding procedure, so that the problems of welding cold joint, pad falling, welding bead splashing to the gear and the like can occur; finally, the key PCB process is labor-intensive in welding.

SUMMERY OF THE UTILITY MODEL

At least one embodiment of the present disclosure provides a terminal made of a conductive material for electrically connecting a pin of a motor with an external connector, including: a first terminal portion including a first body defining a first insertion direction for inserting the pin, and an elastic contact extending from the first body and configured to be elastically deformed with the insertion of the pin to apply a contact force on the pin; a second terminal portion including a second body defining a second insertion direction into the external connector; and a bent portion through which the first terminal portion and the second terminal portion are connected such that the first insertion direction is substantially perpendicular to the second insertion direction.

In some examples, the elastic contact piece includes an elastic arm bent with respect to the first body to form a first included angle θ ranging from 15 ° to 50 °, the elastic arm configured to be bent and deformed toward a direction in which the first included angle θ is decreased as a pin is inserted to generate the contact force, and a contact protrusion configured to contact the pin to apply the contact force.

In some examples, the first terminal portion further comprises: the side surface of the first body is bent to form at least one limiting part, the at least one limiting part comprises a side wall and a top wall, and the at least one limiting part and the first body are encircled to form a pin cavity for receiving the pin.

In some examples, the first body includes a bottom wall from which the resilient contact extends in the first insertion direction such that when the pin is inserted into the pin cavity, a resilient connection is formed between the pin and the top wall, the contact protrusion.

In some examples, the spring contact further includes a support arm extending from the contact protrusion and forming a second included angle α with the spring arm such that the spring arm and the support arm form a substantially V-shape.

In some examples, the second included angle α ranges between 90 ° and 130 ° such that when the pin is inserted into the pin cavity, the end of the support arm can slide on the bottom wall in the first insertion direction, the height a of the support arm in the direction perpendicular to the first insertion direction, the height b of the pin cavity in the direction perpendicular to the first insertion direction, and the maximum dimension c of the pin cross-section satisfy the relationships b-a < c and a < b.

In some examples, the first body includes a bottom wall, the resilient contact extends from the top wall toward the bottom wall in the first insertion direction such that when the pin is inserted into the pin cavity, the pin forms a resilient connection with the bottom wall and the contact protrusion, the resilient contact further includes a support arm extending from the contact protrusion and forming a second included angle α with the resilient arm such that the resilient arm and the support arm form a substantially V-shape.

In some examples, the first terminal portion further comprises: and the elastic contact pieces are bent from the surfaces of the wing pairs towards each other to form a contact bulge pair, so that when the pin is inserted, an elastic connection is formed between the pin and the contact bulge pair.

In some examples, the elastic contact is a pair of wings bent from the side of the first body, and the wings include a plane portion and a contact protrusion protruding from a middle of the plane portion toward the other opposite wing, thereby forming a pair of contact protrusions such that when the pin is inserted, an elastic connection is formed between the pin and the pair of contact protrusions.

In some examples, the second terminal portion further includes a snap spring including a root portion extending from the second body and a free portion extending from the root portion away from the second body and obliquely with respect to the second body.

In some examples, the second terminal portion has a rectangular or U-shaped cross-sectional shape including at least two second side walls extending in the second insertion direction, and is configured to be electrically connected to an electrical contact portion of the external connector when the external connector is inserted.

In some examples, the external connector is a RAST connector, the electrical contact portion includes at least two contact domes, and the at least two second sidewalls are configured to be electrically connected with the at least two contact domes of the external connector, respectively, when the external connector is inserted.

In some examples, the bent portion is provided on either side surface of an end of the first body opposite to the elastic contact piece.

In some examples, the first terminal portion and the second terminal portion are integrally stamped and formed from a conductive material having a thickness between 0.2mm and 0.5 mm.

At least one embodiment of the present disclosure provides a terminal connection device, including: a plurality of the above terminals; and a housing made of an insulating material, the housing including a body portion configured to receive the terminal and a socket portion configured to receive an electrical contact portion of an external connector such that the terminal and the external connector are electrically connected within the terminal connection device.

In some examples, the main body portion is provided with a plurality of mounting holes for receiving the second terminal portions and a plurality of mounting grooves for receiving the first terminal portions, the mounting holes being disposed adjacent to the respective mounting grooves to form mounting pairs, each mounting pair mounting one of the terminals, a mounting gap between each of the plurality of mounting grooves and the first body being between 0 and 0.5 mm.

In some examples, a depth of each of the plurality of mounting grooves is greater than or equal to a height of the first body of the first terminal portion, and each of the plurality of mounting grooves includes a stopper boss protruding from at least one sidewall of the mounting groove and engaging the first terminal portion to limit wobbling of the terminal.

In some examples, each of the plurality of mounting holes includes: a guide positioning rib provided in the mounting hole and having a width slightly smaller than a width between inner surfaces of at least two second side walls of the second terminal portion so as to be allowed to be received between the inner surfaces of the at least two second side walls of the second terminal portion; and the anti-falling boss protrudes from the inner surface of the mounting hole and is configured to form clamping connection with the clamping elastic piece when the second terminal part is mounted.

In some examples, an insulating rib is disposed between adjacent mounting pairs.

At least one embodiment of the present disclosure provides a motor including: a motor housing that houses a coil assembly; the contact pin is electrically connected with the coil assembly; and the terminal connecting device described above, wherein the pin and the external connector are electrically connected in the terminal connecting device through the terminal.

Drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention, and are not intended to limit the present invention.

Fig. 1A illustrates a perspective view of a terminal according to an exemplary embodiment of the present disclosure;

FIG. 1B is a front view of the terminal shown in FIG. 1A;

FIG. 1C is a cross-sectional view of the terminal shown in FIG. 1A;

fig. 1D is a partially enlarged view of the terminal shown in fig. 1C, showing an engaged state when the pin is engaged with the first terminal portion;

fig. 2A shows a perspective view of a terminal according to another embodiment of the present disclosure;

FIG. 2B is a cross-sectional view of the terminal shown in FIG. 2A;

fig. 3A shows a perspective view of a terminal according to yet another embodiment of the present disclosure;

FIG. 3B is a top view of the terminal shown in FIG. 3A;

fig. 4A illustrates a perspective view of a terminal according to yet another embodiment of the present disclosure;

FIG. 4B is a top view of the terminal shown in FIG. 4A;

fig. 5 shows a perspective view of a terminal according to an alternative embodiment of the present disclosure;

fig. 6 shows a perspective view of a terminal according to yet another alternative embodiment of the present disclosure;

fig. 7 illustrates a perspective view of a terminal connection device according to an exemplary embodiment of the present disclosure;

fig. 8 shows an exploded view of fig. 7, and in a partial enlarged view the chamfer of the limit boss.

Fig. 9 is a perspective view of the terminal-connecting device shown in fig. 7 from another angle;

FIG. 10 illustrates a partial enlarged view of a body portion according to an exemplary embodiment of the present disclosure;

fig. 11 is a partial enlarged view of the terminal-connecting device shown in fig. 7;

fig. 12 shows a cross-sectional view of a terminal connection device according to an exemplary embodiment of the present disclosure;

fig. 13 shows a cross-sectional view of a terminal connecting device according to an exemplary embodiment of the present disclosure after being mounted with an external connector;

fig. 14A to 14C are sectional views illustrating a mounting process of a terminal according to an exemplary embodiment of the present disclosure;

fig. 15 shows a cross-sectional view illustrating a mounting process of a terminal according to another embodiment of the present disclosure;

fig. 16 shows a perspective view of an electric machine according to an exemplary embodiment of the present disclosure;

fig. 17 shows an exploded view of the motor according to fig. 16.

List of reference numerals

1 first terminal part

11 first body

12 elastic contact

121 elastic arm

122 contact protrusion

123 support arm

13 position limiting part

131 side wall

132 top wall

133 pin cavity

14 bottom wall

15 side wing

151,152 flank pair

153,154 contact projection pair

155,156 planar portion

2 second terminal part

21 second body

211 second side wall

22 snap-fit elastic member

221 root of Largeleaf Fargeleaf

222 free part

3 bent part

31 cut

4 casing

5 main body part

51 mounting hole

511 guiding and positioning rib

512 anti-falling boss

52 mounting groove

521 side wall

522 limit boss

523 chamfer

53 insulating convex rib

6 socket part

7 Motor casing

8 coil component

81 skeleton

82 enameled wire

9 Transmission assembly

10 rotor assembly

20 pin

30 external connector

301 contact spring

100 terminal

200 terminal connecting device

300 electric machine

Detailed Description

In order to make the technical solution of the present invention, its purpose, technical solution and advantages become clearer, the drawings of the embodiments of the present invention will be combined hereinafter, and the technical solution of the embodiments of the present invention will be clearly and completely described. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

A typical electric machine generally includes a coil assembly and a rotor assembly, the coil assembly being energized to generate a magnetic field to drive the rotor assembly. The coil assembly comprises a contact pin and a winding, the contact pin is electrically connected with the winding and serves as an interface connected with an external power supply, and the contact pin is welded on the PCB in a PCB mode and is electrically connected with an external connector. This PCB board connection method causes a series of problems: firstly, the problem of motor circuit disconnection caused by unsmooth electrical connection inside the PCB is solved; secondly, the PCB adopts at least one welding procedure, so that the problems of welding cold joint, pad falling, welding bead splashing to the gear and the like can occur; finally, the key PCB process is labor-intensive in welding.

It should be noted that the female terminal and the male terminal mentioned in the present invention refer to the way of electrically connecting the terminals, for example, the female terminal, which may also be called as a female terminal, has a wiring cavity, and is electrically connected with the connector by accommodating the connector in the wiring cavity; the male terminal, which may also be referred to as a male terminal, has a terminal wall that is electrically connected to the connector by insertion into a terminal cavity of the connector.

The utility model discloses a terminal 100, this terminal can be connected with contact pin 20 and external connector 30 electricity of motor 300 respectively through first terminal part 1 and second terminal part 2 to contact pin 20 with external connector 30 with motor 300 switches on mutually. The first terminal portion 1 is preferably a female terminal and the second terminal portion 2 is preferably a male terminal. Through the utility model discloses the PCB board can be omitted to the wiring scheme of realization to the installation that the scheme of having avoided carrying out the switching through the PCB board is related is complicated and technical problem such as desoldering.

A terminal 100 according to at least one embodiment of the present disclosure includes a first terminal portion 1, the first terminal portion 1 including a first body 11 and an elastic contact 12, the first body 11 defining a first insertion direction a for inserting a pin 20, the elastic contact 12 extending from the first body 11, and the elastic contact 12 configured to be elastically deformed as the pin 20 is inserted to exert a contact force on the pin 20; a second terminal portion 2, the second terminal portion 2 including a second body 21, the second body 21 defining a second insertion direction B into the external connector 30; and a bent portion 3, the first terminal portion 1 and the second terminal portion 2 being connected by the bent portion 3 such that the first insertion direction a is substantially perpendicular to the second insertion direction B.

A terminal 100 according to an exemplary embodiment of the present invention will be described below with reference to fig. 1A to 1D. Fig. 1A illustrates a perspective view of a terminal according to an exemplary embodiment of the present disclosure, fig. 1B is a front view of the terminal illustrated in fig. 1A, fig. 1C is a sectional view of the terminal illustrated in fig. 1A, and fig. 1D is a partially enlarged view of the terminal illustrated in fig. 1C, which illustrates an engaged state when a pin is engaged with a first terminal portion. As shown, the terminal 100 includes a first terminal portion 1, a second terminal portion 2, and a bent portion 3, the first terminal portion 1 includes a first body 11 and an elastic contact 12, the first body 11 defines a first insertion direction a for inserting the pin 20, the elastic contact 12 extends from the first body 11 in the first insertion direction a, and the elastic contact 12 exerts a component force F of a contact force on the pin 20 perpendicular to the first insertion direction a. The second terminal portion 2 includes a second body 21, the second body 21 defining a second insertion direction B into the external connector 30.

In the present embodiment, the first terminal portion 1, the second terminal portion 2, and the bent portion 3 are integrally formed, for example, by press-forming. The first terminal portion 1 and the second terminal portion 2 are connected by the bent portion 3, and the bent portion 3 is provided on either side surface of an end of the first body 11 opposite to the elastic contact piece 12, and in this embodiment, the bent portion 3 is provided at an end opposite to the elastic contact piece 12 and is located on a side surface facing outward of the paper surface in fig. 1A, and the bent portion 3 may be provided at other positions, for example, a side surface facing inward of the paper surface, or an end side surface facing the elastic contact piece 12, which will be described in a later embodiment. The bent portion 3 has a bent right-angle shape, and thus the first terminal portion 1 and the second terminal portion 2 are bent to be substantially perpendicular, so that the first insertion direction a is substantially perpendicular to the second insertion direction B.

In a typical motor configuration, when the motor base is placed on a horizontal surface, the output shaft of the motor is generally perpendicular to the horizontal surface, while the pins of the coil assembly are generally parallel to the horizontal surface. The external connector is usually inserted into the motor housing from below, so the mounting direction of the external connector is usually perpendicular to the mounting direction of the contact pin, therefore the terminal 100 of the present invention also takes the above factors into consideration, and the first terminal portion 1 for electrically connecting the contact pin and the second terminal portion 2 for electrically connecting the external connector are bent to be substantially perpendicular by the bending portion 3, so as to facilitate the mounting operation. The bending part 3 can also be provided with a notch 31, so that the structure is simplified and the material is saved.

It should be noted that, in the present invention, "substantially perpendicular" means being 90 degrees or approximately equal to 90 degrees, and it is very difficult to realize complete perpendicularity between two components, i.e. precisely 90 degrees, in consideration of actual production conditions, but in practical application, a certain deviation from 90 degrees, for example, within plus or minus 5 degrees, can also realize the technical effects of the present invention.

The terminal 100 is made of a conductive material commonly used in the art, such as copper, aluminum, a copper alloy or an aluminum alloy, preferably made of copper or a copper alloy, has a thickness of 0.2mm to 0.5mm, such as 0.3mm, and is preferably integrally formed by stamping with a die. The material thickness is selected primarily with consideration of the following factors: if the thickness of the material is too thin, for example, less than 0.2mm, the mechanical strength of the manufactured terminal is too weak to meet the requirement of the terminal insertion strength; if the material thickness is too thick, for example, greater than 0.5mm, the elastic coefficient of the elastic contact 12 is too large, which results in a large assembly difficulty, and the whole size of the terminal inevitably becomes large due to the increased material thickness, which results in an increased installation space and waste of space and material cost.

In this embodiment, the first terminal portion 1 further includes at least one limiting portion 13, preferably two limiting portions 13, formed by bending from the side of the first body 11, each limiting portion 13 includes a side wall 131 and a top wall 132, and the limiting portions 13 and the first body 11 surround to form a pin cavity 133 for receiving the pin 20.

The elastic contact 12 includes an elastic arm 121, a contact protrusion 122 and a support arm 123, the elastic arm 121 is bent with respect to the first body 11 to form a first included angle θ, the elastic arm is configured to be bent and deformed toward a direction in which the first included angle θ is decreased as the pin is inserted to generate a contact force, and the contact protrusion 122 is configured to contact the pin 20 to apply the contact force.

In the present embodiment, the first body 11 includes a bottom wall 14, and the elastic contact 12 is bent and extended from the bottom wall 14 along the first insertion direction a, so that when the pin 20 is inserted into the pin cavity 133 along the first insertion direction a, an elastic connection is formed between the pin 20 and the top wall 132 and the contact protrusion 122.

The supporting arm 123 extends from the contact protrusion 122 and forms a second included angle α with the resilient arm 121, so that the resilient arm 121 and the supporting arm 123 form a substantially V-shape, as shown in the figure, the supporting arm 123 has a height a perpendicular to the first insertion direction A, the pin cavity 133 has a height b perpendicular to the first insertion direction A, b can also be defined as the distance between the bottom surface of the top wall 132 and the surface of the first body 11, the maximum dimension of the cross-section of the pin 20 is c, the above parameters are designed to satisfy the following relationships b-a < c and a < b, in practical applications, the dimensions of the pin 20 are given, so c can be considered constant, so the dimensions of the parameters a and b can be adjusted according to the above relationships, the size of b-a can be considered as the gap between the contact protrusion 122 and the top wall 132 in the non-inserted state, while satisfying the relationship b-a < c can ensure that the resilient contact 20 can drive the resilient contact 12 to deform, especially the resilient arm 121, so that the first included angle 122 becomes smaller, the contact protrusion 122, i.e.g., the resilient arm 12 and the resilient arm 121 can be designed to prevent the contact from being deformed more than the contact 12 when the contact 20 is inserted, the contact 20 is inserted into the contact 120, the contact 120 is designed to prevent the contact from being deformed, the contact element is designed to be inserted into the contact element, the contact element is designed to be inserted into the contact element, so that the contact element is not to be inserted angle is larger than the contact element, so that the contact element 120 is not to be inserted angle 30, so that the contact element is not to be inserted into the contact element, so that the contact element is not to be inserted angle is not to be inserted into the contact element.

The cross-sectional shape of the second body 21 of the second terminal portion 2 may be rectangular or U-shaped, comprising at least two second side walls 211 extending in the second insertion direction B for being configured to be electrically connected with electrical contact portions of the external connector 30 when the external connector 30 is inserted. In particular, the second body 21 may include two second sidewalls 211. When the external connector is a RAST connector, the electrical contact portions may be two contact domes 301, the two second side walls 211 are used to engage the two contact domes 301 of the external connector 30, respectively, when the external connector 30 is inserted, and in the present embodiment, the second body 21 has a U-shaped cross-sectional shape and extends in the second insertion direction B.

As shown in the figure, the second terminal portion 2 further includes two snap springs 22, and the snap springs 22 include root portions 221 extending from the second side wall 211 of the second body 21 and free portions 222 extending from the root portions 221 away from the second body 21 and obliquely with respect to the second body 21. The manner of engagement of the snap springs 22 will be described in detail later in the description.

Having described the configuration of the terminal 100 according to an exemplary embodiment, the method of manufacturing the terminal 100 according to this embodiment will be briefly described below, and the manufacturing method is merely exemplary, and the terminal 100 may be manufactured by other conventional methods in the art. First, a copper plate material having a thickness of 0.3mm is provided, and the first terminal portion 1, the second terminal portion 2, and the bent portion 3 of the terminal 100 are press-formed on the copper plate while they are in the same plane. Next, the respective features of the first terminal portion 1 and the second terminal portion 2, including but not limited to the elastic contact 12, the elastic arm 121, the contact protrusion 122, the support arm 123, the limiting portion 13, the second side wall 211, and the snap-fit elastic member 22, are bent out. Finally, the bent portion 3 is bent by 90 degrees so that the first terminal portion 1 is perpendicular to the second terminal portion 2, thereby forming the terminal 100 of this embodiment.

A terminal 100 according to another exemplary embodiment of the present invention will be described below with reference to fig. 2A to 2B. Fig. 2A illustrates a perspective view of a terminal according to another embodiment of the present disclosure, and fig. 2B is a cross-sectional view of the terminal illustrated in fig. 2A. Only the differences between the present embodiment and the embodiment shown in fig. 1A to 1D will be described below, and the similarities will not be described again. Compared to the embodiment shown in fig. 1A to 1D, the extending starting point of the elastic contact 12 of the present embodiment is different, and in the present embodiment, the elastic contact 12 is bent and extends from the top wall 132 of one of the position-limiting portions 13 (for example, the position-limiting portion 13 closer to the end portion) toward the bottom wall 14 along the first insertion direction a. At this time, when the pin 20 is inserted into the pin cavity 133, the pin 20 forms an elastic connection with the bottom wall 14 of the first body 11 and the contact protrusion 122.

Referring to fig. 3A to 3B, a terminal 100 according to yet another exemplary embodiment of the present invention is shown. Fig. 3A illustrates a perspective view of a terminal according to yet another embodiment of the present disclosure, and fig. 3B is a top view of the terminal illustrated in fig. 3A. Only the differences between the present embodiment and the embodiment shown in fig. 1A to 1D will be described below, and the similarities will not be described again. Compared with the embodiments shown in fig. 1A to 1D or fig. 2A to 2B, the elastic contact 12 of the present embodiment is disposed in a different manner. Specifically, the elastic contact 12 is formed by bending from the surfaces of the pair of wings 15 toward each other, and the wings 15 are formed by bending from the side surfaces of the first body 11. In this embodiment, a pair of wings 15 form a pair of wings 151,152, and the pair of wings 151,152 are bent toward each other to form a pair of contact protrusions 153, 154.

As shown in fig. 3B, the elastic contact 12 is bent into a V-shape similar to that of the embodiment shown in fig. 1A to 1D or fig. 2A to 2B, except that when the pin 20 is inserted in the first insertion direction a, an elastic connection is formed between the pin 20 and the pair of contact protrusions 153, 154.

Referring to fig. 4A to 4B, a terminal 100 according to still another exemplary embodiment of the present invention is shown. Fig. 4A illustrates a perspective view of a terminal according to still another embodiment of the present disclosure, and fig. 4B is a top view of the terminal illustrated in fig. 4A. Only the differences between the present embodiment and the embodiment shown in fig. 3A to 3B will be described below, and the similarities will not be described again. Compared with the embodiment shown in fig. 3A to 3B, the elastic contact 12 of the present embodiment is disposed in a different manner. Specifically, the elastic contact 12 is a pair of flanks 151,152 formed by being bent from the side of the first body 11, and the flanks 151,152 include a flat surface portion 155,156 and a pair of contact projections 153,154 protruding from the middle of the flat surface portion 155,156 toward the opposite other flank, thereby forming a pair of contact projections such that when the pin 20 is inserted in the first insertion direction a, an elastic connection is formed between the pin 20 and the pair of contact projections 153, 154.

Fig. 5 and 6 again illustrate terminals 100 according to two alternative embodiments of the present disclosure. Fig. 5 illustrates a perspective view of a terminal according to an alternative embodiment of the present disclosure, and fig. 6 illustrates a perspective view of a terminal according to yet another alternative embodiment of the present disclosure. The second terminal portion 2 and the bent portion 3 of the two embodiments are different in structure compared to the respective embodiments described above. Specifically, fig. 5 shows an alternative embodiment in which the number of the snap elastic pieces 22 is one, and the snap elastic pieces are disposed on the back surface of the U-shaped second body 21, i.e., the surface connecting the two second side walls 211. Fig. 6 shows an alternative embodiment in which the second body 21 has a rectangular cross-sectional shape and the number of the snap springs 22 is one, and similarly, the snap springs are also provided on the back surface of the rectangular second body 21, i.e., the surface of the rectangular cross-section facing the first body 11. In this alternative embodiment, the bent portion 3 is provided on the end side surface facing the elastic contact piece 12, so that the first terminal portion 1 and the second terminal portion 2 are provided substantially in the same plane and substantially perpendicular to each other.

The utility model discloses a terminal connecting device 200, include: a plurality of terminals 100 as described above and a housing 4 made of an insulating material, the housing 4 including a body portion 5 and a socket portion 6, the body portion 5 configured to accommodate the terminals 100, the socket portion 6 configured to accommodate an electrical contact portion of the external connector 30 so that the terminals 100 and the external connector 30 are electrically connected within the terminal connecting device 200.

The terminal-connecting device 200 may be fixed to the motor 300 by means of a snap connection. The terminal-connecting device 200 stably holds the terminal 100, one end of the terminal 100 being connected to the pin 20 of the motor 300 and the other end being connected to the external connector 30. Through the utility model discloses the PCB board can be omitted to the wiring scheme of realization to avoided carrying out the technical problem such as the installation complicacy that the scheme of switching relates through the PCB board, and can realize that the optimization of terminal arranges with stable in position. Furthermore, it has other technical advantages as will be mentioned below.

A terminal connection device 200 according to an exemplary embodiment of the present invention will be described below with reference to fig. 7 to 13. Fig. 7 illustrates a perspective view of a terminal connection device according to an exemplary embodiment of the present disclosure, fig. 8 illustrates an exploded view of fig. 7, and illustrates a chamfer of a stopper boss in a partially enlarged view. Fig. 9 is a perspective view of the terminal-connecting device shown in fig. 7, viewed from another angle. Fig. 10 illustrates a partial enlarged view of a body portion according to an exemplary embodiment of the present disclosure. Fig. 11 is a partially enlarged view of the terminal-connecting device shown in fig. 7. Fig. 12 illustrates a cross-sectional view of a terminal-connecting device according to an exemplary embodiment of the present disclosure. Fig. 13 shows a cross-sectional view of a terminal connection device according to an exemplary embodiment of the present disclosure after being mounted with an external connector.

As shown, the terminal connection device 200 includes a housing 4 and a plurality of terminals 100, preferably two terminals 100, the housing 4 includes a body portion 5 and a socket portion 6, the body portion 5 is configured to accommodate the terminals 100, the socket portion 6 is configured to accommodate the external connector 30, and the terminals 100 and the external connector 30 are electrically connected to each other in the terminal connection device 200. The configuration of the housing 4 of the terminal-connecting device 200 will be described below.

As described previously, the housing 4 includes the body portion 5 and the socket portion 6, and the body portion 5 and the socket portion 6 may be formed in one piece by injection molding. The body portion 5 is provided with a plurality of mounting holes 51 for accommodating the second terminal portions 2 of the terminals 100 and a plurality of mounting grooves 52 for accommodating the first terminal portions 1 of the terminals 100, the mounting holes 51 being disposed adjacent to the respective mounting grooves 52 to form mounting pairs, one terminal 100 being mounted in each mounting pair. In the present embodiment, the housing 4 includes two mounting pairs formed by the mounting holes 51 and the mounting grooves 52, to which the two terminals 100 are mounted, respectively.

The mounting groove 52 is mainly used for engaging the first terminal portion 1 of the terminal 100, a mounting gap between the mounting groove 52 and the first body 11 of the first terminal portion 1 is between 0 and 0.5mm, a depth of the mounting groove 52 is greater than or equal to a height of the first body 11 of the first terminal portion 1 so that the first terminal portion 1 can be completely inserted into the mounting groove 52, and each mounting groove 52 includes a stopper boss 522 protruding from one side wall of the mounting groove 52 and engaging the first terminal portion 1 of the terminal 100, specifically engaging the first body 11, when the terminal 100 is inserted in the second insertion direction B to position the terminal 100 in the mounting groove 52 and to restrict shaking of the terminal 100 by the stopper boss 522, thereby ensuring stable mounting of the terminal 100. The end of the limit boss 522 may also be provided with a chamfer 523, as shown in fig. 8 and 11, the chamfer 523 may facilitate installation and removal, and avoid machining burrs from interfering with installation or causing injury to a user.

The mounting holes 51 are mainly used for accommodating the second terminal portions 2 of the terminals 100, and each mounting hole 51 includes: a guide positioning rib 511 and a coming-off prevention boss 512, the guide positioning rib 511 being provided in the mounting hole 51 and having a width slightly smaller than a width between the inner surfaces of the at least two second side walls 211 of the second terminal portion 2 to allow being configured to be received between the inner surfaces of the at least two second side walls 211 of the second terminal portion 2. For example, the width of the guiding and positioning rib 511 is slightly smaller than the width between the inner surfaces of the two second side walls 211 of the second terminal portion 2, and in this embodiment, the single-sided fit gap is not more than 0.1mm, which helps to support the side walls of the second terminal portion 2, so that when the second side walls 211 of the second terminal portion 2 are elastically and electrically connected with the external connector 30, the clamping force of the external connector 30 on the second side walls 211 of the second terminal portion 2 is prevented from causing the side walls to contract close to each other, and the poor electrical connection phenomenon is prevented. As shown in fig. 12 and 13, in order to better position and fix the position of the second terminal portion 2, the side surface of the guide positioning rib 511 which comes into contact with the inner surface of the second side wall 211 of the second terminal portion 2 has a draft angle such that the thickness of the guide positioning rib 511 gradually increases in the second insertion direction B to facilitate the insertion and positioning of the second terminal portion 2. The coming-off prevention boss 512 projects from the inner surface of the mounting hole 51, and as shown in fig. 12, the coming-off prevention boss 512 is configured to form a snap connection with the snap spring 22 when the second terminal part 2 is mounted. The mounting process of the second terminal portion 2 will be described later in detail.

In addition, since the terminals 100 are charged during operation, the insulating ribs 53 are disposed between the adjacent pairs for isolating and insulating the adjacent terminals 100, thereby ensuring sufficient electrical gap and creepage distance between the terminals 100 and preventing short circuit between poles or leakage of electricity between the terminals 100.

As shown in fig. 9, 12 and 13, the socket portion 6 is for receiving the external connector 30 to be inserted from a direction opposite to the second insertion direction B and fixing the external connector 30 by snap-fit connection.

The external connector 30 may include a pair of contact springs 301 that apply a clamping force to the second side wall 211 of the second terminal portion 2 to thereby achieve electrical connection.

Fig. 14A to 14C are sectional views illustrating a mounting process of a terminal according to an exemplary embodiment of the present disclosure. The mounting process of the second terminal portion 2 into the main body portion 5 of the housing 4 will be described below with reference to fig. 14A to 14C. In the present embodiment, the second terminal portion 2 may be, for example, the structure in the embodiment of fig. 1A to 4B, that is, the second terminal portion 2 includes two snap springs 22 extending from the second side wall 211.

Fig. 14A shows a state before the elastic engaging member 22 contacts the anti-falling boss 512 during the insertion of the terminal 100, in which the free portion 222 of the elastic engaging member 22 extends obliquely with respect to the second body 21 and is not subjected to force. Fig. 14B shows a state in which the snap spring 22 is in contact with the coming-off preventing projection 512 during the insertion of the terminal 100, and the free portion 222 of the snap spring 22 is in contact with the coming-off preventing projection 512 and is deformed by the force of the surface of the coming-off preventing projection 512. At this time, a force in the second insertion direction B continues to be applied to the terminal 100, and as shown in fig. 14C, the terminal 100 is fully inserted into the housing 4, the free portion 222 is not subjected to the force, and returns to the normal shape. At this time, the free portion 222 is in contact with the lower portion of the coming-off preventing projection 512, while the inner surface of the second side wall 211 of the second terminal part 2 is in close contact with the stopper projection 522, thereby restricting the movement of the terminal 100 in the second insertion direction B, and completing the mounting of the terminal 100. After which the external connector 30 may be inserted into the socket portion 6 and electrically connected with the second terminal portion 2 of the terminal 100, as shown in fig. 13.

Fig. 15 shows a cross-sectional view of the second terminal portion 2 of a further alternative embodiment, which is installed in the main body portion 5 of the housing 4, and unlike the previous embodiment, the second terminal portion 2 of the present embodiment may be, for example, the structure of the embodiment of fig. 5 to 6, that is, the second terminal portion 2 includes one snap-fit elastic member 22 disposed on the surface connecting the two second side walls 211, and the number of the anti-falling bosses 512 may be one, and the installation process and principle thereof are similar to those of the previous embodiment, and fig. 15 shows the second terminal portion 2 in the state of being snapped and positioned after being installed.

The utility model discloses still disclose a motor 300, include: a motor housing 7, the motor housing 7 accommodating a coil assembly 8; the contact pin 20 is electrically connected with the coil assembly 8; and the terminal-connecting device 200 as described above, the pin 20 and the external connector 30 are electrically connected in the terminal-connecting device 200 through the terminal 100, for example, to form a reliable electrical connection.

Fig. 16 illustrates a perspective view of a motor 300 according to an exemplary embodiment of the present disclosure. Fig. 17 shows an exploded view of the motor 300 according to fig. 16. The motor 300 includes a motor housing 7, a coil assembly 8, a transmission assembly 9, a rotor assembly 10, a pin 20, and the above-described terminal connection device 200. As shown in fig. 16 and 17, the terminal connecting device 200 is fixedly attached to the motor housing 7 by snap-fit connection. The motor housing 7 houses a coil assembly 8, a transmission assembly 9 and a rotor assembly 10. The coil assembly 8 includes a bobbin 81 and an enamel wire 82 wound on the bobbin 81, and the contact pin 20 is electrically connected to the coil assembly 8, specifically, the enamel wire 82. The pins 20 may be mounted to the coil assembly 8 using mounting means known in the art, such as by soldering, and will not be described further herein.

As described in the foregoing embodiments, the pin 20 of the motor 300 and the external connector 30 form a reliable electrical connection in the terminal-connecting device 200 through the terminal 100.

In operation, the external connector 30 receives a driving voltage signal and transmits it to the coil assembly 8 through the terminals 100 and the pins 20, thereby generating an alternating magnetic field, driving the rotor assembly 10 to rotate, the rotation of the rotor assembly 10 being transmitted to the transmission assembly 9 through the output shaft and finally being output from the rotational shaft of the transmission assembly 9.

The motor 300 adopting the technical scheme of the embodiment has a compact structure, the pin 20 of the motor 300 is electrically connected with the external connector 30 in the terminal connecting device 200 through the terminal 100, and meanwhile, the pin 30 is electrically connected with the terminal 100 through the elastic contact piece 12, so that processes such as welding are omitted, the process cost is saved, and the production efficiency can be improved.

The above description is only a specific implementation manner of the present invention, but the scope of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the embodiments of the present invention or under the idea of the present invention disclosed in the embodiments of the present invention, and all the changes or substitutions should be covered within the scope of the embodiments of the present invention.

Claims (20)

1. A terminal, made of an electrically conductive material, for electrically connecting a pin of an electric motor with an external connector, comprising:

a first terminal portion including a first body defining a first insertion direction for inserting the pin, and an elastic contact extending from the first body and configured to be elastically deformed with the insertion of the pin to apply a contact force on the pin;

a second terminal portion including a second body defining a second insertion direction into the external connector; and

a bent portion through which the first terminal portion and the second terminal portion are connected such that the first insertion direction is substantially perpendicular to the second insertion direction.

2. The terminal of claim 1, wherein the resilient contact includes a resilient arm bent with respect to the first insertion direction to form a first included angle θ ranging from 15 ° to 50 °, and a contact protrusion configured to contact the pin to apply the contact force, the resilient arm being configured to flex toward a direction that decreases the first included angle θ as the pin is inserted to generate the contact force.

3. The terminal of claim 2, wherein the first terminal portion further comprises:

the side surface of the first body is bent to form at least one limiting part, the at least one limiting part comprises a side wall and a top wall, and the at least one limiting part and the first body are encircled to form a pin cavity for receiving the pin.

4. A terminal according to claim 3, wherein the first body includes a bottom wall from which the resilient contact extends in the first insertion direction such that when the pin is inserted into the pin cavity, a resilient connection is formed between the pin and the top wall, the contact protrusion.

5. The terminal of claim 4, wherein the spring contact further comprises a support arm extending from the contact protrusion and forming a second included angle α with the spring arm such that the spring arm and the support arm form a substantially V-shape.

6. The terminal of claim 5, wherein the second included angle α ranges between 90 ° and 130 ° such that the end of the support arm is slidable on the bottom wall in the first insertion direction when the pin is inserted into the pin cavity,

the height a of the supporting arm in the direction perpendicular to the first inserting direction, the height b of the pin cavity in the direction perpendicular to the first inserting direction and the maximum dimension c of the pin section satisfy the following relations: b-a < c and a < b.

7. The terminal of claim 3, wherein the first body includes a bottom wall, the resilient contact extends from the top wall toward the bottom wall in the first insertion direction such that when the pin is inserted into the pin cavity, the pin forms a resilient connection with the bottom wall and the contact protrusion, the resilient contact further including a support arm extending from the contact protrusion and forming a second included angle α with the resilient arm such that the resilient arm and the support arm form a generally V-shape.

8. The terminal of claim 1, wherein the first terminal portion further comprises:

and the elastic contact pieces are bent from the surfaces of the wing pairs towards each other to form a contact bulge pair, so that when the pin is inserted, an elastic connection is formed between the pin and the contact bulge pair.

9. A terminal according to claim 1, wherein the resilient contact is a pair of wings bent from the side of the first body, the wings including a flat portion and a contact projection projecting from a middle portion of the flat portion toward the other opposite wing, thereby forming a pair of contact projections such that when the pin is inserted, a resilient connection is formed between the pin and the pair of contact projections.

10. A terminal according to claim 1, wherein the second terminal portion further comprises a snap spring including a root portion extending from the second body and a free portion extending from the root portion away from the second body and obliquely with respect to the second body.

11. A terminal according to claim 1, wherein the second terminal portion has a rectangular or U-shaped cross-sectional shape, and includes at least two second side walls extending in the second insertion direction and configured to be electrically connected to electrical contact portions of the external connector when the external connector is inserted.

12. The terminal of claim 11, wherein the external connector is a RAST connector, wherein the electrical contact portion comprises at least two contact domes, and wherein the at least two second sidewalls are configured to electrically connect with the at least two contact domes of the external connector, respectively, when the external connector is inserted.

13. The terminal of claim 1, wherein the bent portion is provided on either side surface of an end of the first body opposite to the elastic contact piece.

14. The terminal of claim 1, wherein the first terminal portion and the second terminal portion are integrally stamped and formed from a conductive material having a thickness of between 0.2mm and 0.5 mm.

15. A terminal connecting device, characterized by comprising:

a plurality of terminals as claimed in any one of claims 1 to 14; and

a housing made of an insulating material, the housing comprising a body portion configured to receive the terminal and a socket portion configured to receive an electrical contact portion of an external connector such that the terminal and the external connector are electrically connected within the terminal connection device.

16. The terminal-connecting device according to claim 15, wherein the main body portion is provided with a plurality of mounting holes for receiving the second terminal portions and a plurality of mounting grooves for receiving the first terminal portions, the mounting holes being provided adjacent to the respective mounting grooves to form mounting pairs, each mounting pair mounting one of the terminals, a mounting gap between each of the plurality of mounting grooves and the first body being between 0 and 0.5 mm.

17. The terminal-connecting device according to claim 16, wherein each of the plurality of mounting grooves has a depth greater than or equal to a height of the first body of the first terminal portion, and each of the plurality of mounting grooves includes a stopper boss protruding from at least one side wall of the mounting groove and engaging the first terminal portion to restrict wobbling of the terminal.

18. The terminal-connecting device according to claim 16, wherein the second terminal portion further includes a snap spring, each of the plurality of mounting holes includes:

a guide positioning rib provided in the mounting hole and having a width slightly smaller than a width between inner surfaces of at least two second side walls of the second terminal portion so as to be allowed to be received between the inner surfaces of the at least two second side walls of the second terminal portion;

and the anti-falling boss protrudes from the inner surface of the mounting hole and is configured to form clamping connection with the clamping elastic piece when the second terminal part is mounted.

19. The terminal-connecting device according to claim 16, wherein an insulating rib is provided between adjacent mounting pairs.

20. An electric machine, comprising:

a motor housing that houses a coil assembly;

the contact pin is electrically connected with the coil assembly; and

the terminal-connecting device of any one of claims 15 to 19, wherein the pin and the external connector are electrically connected within the terminal-connecting device through the terminal.

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