JP2017188333A - Crimp terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crimp terminal in novel structure capable of preventing occurrence of jump-up deformation of a margin of a core wire to the side of a connection part.SOLUTION: A crimp terminal 10 is configured by including: a connection part 22 which is conducted and connected to an electrical connection target; a core wire crimp part 20 which is crimped to a core wire 14 of a covered conductor 12; and a coupling part 24 extending between the connection part 22 and the core wire crimp part 20. In the coupling part 24, a margin pressing piece 28 is protrusively provided for pressing, from an outer peripheral side, a margin 30 of the core wire 14 protruding from the core wire crimp part 20 closer to the connection part 22 at a position separated from the core wire crimp part 20 closer to the connection part 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a crimp terminal that is crimped to a core wire of a covered electric wire.

  2. Description of the Related Art Conventionally, a crimp terminal attached by being crimped to a core wire exposed at an end of a covered electric wire used in an electrical system such as an automobile has been widely adopted. For example, as described in JP-A-2015-103369 (Patent Document 1), the crimp terminal is formed of a conductive member such as a metal and is conductively connected to an electrical connection target. It is set as the structure which has a connection part, the core wire crimping part crimped | bonded to the outer peripheral surface of the core wire of a covered electric wire, and the connection part extended between them.

  By the way, when crimping the core wire crimping portion of the crimp terminal to the core wire of the covered electric wire, in a state of providing a so-called protrusion portion in which the tip of the core wire protrudes to the connection portion side from the core wire crimping portion of the crimp terminal, It is desirable to perform crimping. Thereby, the connection state between the crimp terminal and the covered electric wire is stably secured, and it can be easily and surely confirmed that the necessary contact allowance between the core wire crimping portion and the core wire is satisfied.

  However, due to the die shape of the crimping machine, the wear of the die, and the like, the protruding portion of the core wire may be deformed so as to jump upward as described in FIG. . When such a jumping deformation of the protruding portion occurs, for example, when the crimp terminal is attached to the terminal cavity of the connector, the protruding portion interferes with a lance or the like disposed in the terminal cavity, and thus enters the terminal cavity. In some cases, it was difficult to attach the crimp terminal. In addition, there is a risk that the deformed protruding portion interferes with other members and the like, causing problems such as a short circuit.

JP2015-103369A

  The present invention has been made in the background of the above-mentioned circumstances, and its solution is a crimp terminal having a novel structure capable of preventing the occurrence of jumping deformation of the protruding portion toward the connecting portion side of the core wire. Is to provide.

  The first aspect of the present invention includes a connection part that is conductively connected to an electrical connection target, a core wire crimping part that is crimped to a core wire of the covered electric wire, and between the connection part and the core wire crimping part. In the crimp terminal configured to include an extending connecting portion, the connecting portion is protruded from the core crimping portion to the connecting portion at a position spaced from the core crimping portion to the connecting portion. A protruding portion pressing piece for pressing the protruding portion of the core wire from the outer peripheral side is projected.

  According to this aspect, the connecting portion of the crimp terminal is provided with a protruding portion pressing piece that presses the protruding portion of the core wire protruding from the core wire crimping portion toward the connecting portion side from the outer peripheral side. The allowance portion can be pressed from the outer peripheral side with the allowance portion presser piece. Therefore, the occurrence of the jumping deformation of the leading portion, which has been a problem in the prior art, is completely prevented, and the occurrence of problems due to interference with other members due to the deformed leading portion can be prevented.

  Moreover, since the protruding portion pressing piece in the connecting portion is provided at a position separated from the core wire crimping portion to the connecting portion side, the protruding portion is pressed from the outer peripheral side and covered by the protruding portion pressing piece. Even in this case, it can be easily confirmed that the projecting portion protrudes from the core crimping portion to the connecting portion side. Therefore, the visual confirmation of the connection state based on the presence or absence of the core wire protruding portion from the core wire crimping portion can be easily and reliably performed, and the securing of the connection stability is ensured at the same time.

  According to a second aspect of the present invention, in the one described in the first aspect, a protruding dimension from the connecting portion of the protruding portion pressing piece pressed against the protruding portion is pressure-bonded to the core wire. It is comprised so that it may become smaller than the protrusion dimension from the said connection part of the said core wire crimping | compression-bonding part.

  According to this aspect, since the protruding dimension from the connecting portion of the protruding portion pressing piece is configured to be smaller than the protruding dimension from the connecting portion of the core wire crimping portion, the protruding portion of the protruding portion is deformed up and down. In addition to being prevented, the protruding height of the entire protruding portion including the protruding portion pressing piece can be made smaller than that of the core wire crimping portion. As a result, it is possible to more reliably prevent interference with other members of the allowance portion.

  According to a third aspect of the present invention, there is provided the pair according to the first or second aspect, wherein a pair of the protruding portion pressing pieces project outward from both end edges in the width direction of the connecting portion. And the dimension of the core wire extending direction of each of the pair of protruding portion pressing pieces gradually decreases from the base end side connected to the connecting portion toward the projecting end portion. It is.

  According to this aspect, since the protruding portion pressing piece is provided in a pair so as to protrude from both end edges in the width direction of the connecting portion, the protruding dimension of each protruding portion pressing piece can be reduced, and the yield can be improved. Can be planned. In addition, the pressing process to the allowance portion can be executed stably with a good balance and with a small pressing force. In addition, in the first place, the allowance part presser piece for pressing the allowance part with a limited allowance dimension is smaller in the extension direction of the core wire than the core wire crimp part, and the core wire crimping Since it is necessary to be separated from the portion, the dimension in the extending direction that is further allowed is further reduced. In such a case, the width dimension, which is the dimension in the extending direction of the core wire, is gradually reduced from the base end side toward the projecting end side. When it is pressed and deformed, the strength on the base end side where stress concentrates is reinforced, and the strength and durability of the small protruding portion pressing piece can be advantageously ensured.

  According to the present invention, since the protruding portion pressing piece that presses the protruding portion of the core wire from the outer peripheral side protrudes from the connecting portion of the crimp terminal, the protruding portion is the outer peripheral side with the protruding portion holding piece. Can be pressed. Therefore, the occurrence of the jumping deformation of the protruding portion, which has been a conventional problem, is completely prevented, and the occurrence of problems due to interference with other members due to the deformed protruding portion can be prevented. Moreover, since the protruding portion pressing piece in the connecting portion is provided at a position separated from the core wire crimping portion to the connecting portion side, the protruding portion is pressed from the outer peripheral side and covered by the protruding portion pressing piece. Even in this case, it can be easily confirmed that the protruding portion protrudes from the core crimping portion to the connection portion side. Therefore, the visual confirmation of the connection state by the presence or absence of the core wire protruding portion from the core wire crimping portion can be easily and reliably performed, and the securing of the connection stability is ensured at the same time.

The side view which shows the crimp terminal as one Embodiment of this invention, Comprising: The figure which shows the state by which the covered electric wire was attached. The top view of FIG. The expanded view of the crimp terminal shown in FIG. The perspective view which shows the state which mounted | wore the terminal cavity of the connector with the crimp terminal of this embodiment attached to the electric wire terminal. The principal part enlarged view of the VV cross section in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the crimp terminal 10 as one Embodiment of this invention is shown by FIGS. 1-3. As shown in FIGS. 1 and 2, the crimp terminal 10 is integrally formed of a conductive metal and is used in a state where the covered electric wire 12 is connected. Here, the covered electric wire 12 has a structure in which a core wire 14 obtained by bundling a plurality of metal wires such as copper, aluminum, or the like, which is a conductor, is covered with an insulating coating 16 having an electrical insulating property such as an ethylene resin or a styrene resin. It is said that. More specifically, the crimping terminal 10 is a core crimping that a crimping portion 18 that is crimped to the insulation coating 16 at the end of the coated wire 12 and a core wire 14 that extends from the end of the insulation coating 16 is crimped. The unit 20 includes a connection part 22 that is electrically connected to an electrical connection target (not shown), and a connecting part 24 that extends between the core wire crimping part 20 and the connection part 22. In the following description, “upper” means the upper part in FIG. 1, “lower” means the lower part in FIG. 1, “front” means the left side in FIGS. Say right.

  The connection portion 22 has a substantially rectangular cylindrical shape, and has an engagement hole 26 that opens toward the front (left side in FIGS. 1 and 2), and thus an electrical connection (not shown). The terminal connected to the object can be inserted and connected. On the other hand, the connecting portion 24 includes a pair of substantially trapezoidal flat plate-shaped protruding portion pressing pieces 28 and 28 in the width direction of the connecting portion 24 (at the substantially central portion in the longitudinal direction (left and right in FIGS. 1 and 2)). In FIG. 2, it protrudes outward from the edge of both ends). More specifically, the pair of protruding portion pressing pieces 28, 28 are formed at positions separated from the core wire crimping portion 20 toward the connecting portion 22, and the core wire is interposed between the pair of protruding portion pressing pieces 28, 28. A tip end portion of the protruding portion 30 of the core wire 14 protruding from the crimping portion 20 to the connection portion 22 side is disposed. Therefore, for example, as shown in FIGS. 1 and 2, by applying a caulking process to the pair of protruding portion pressing pieces 28, 28 using a known crimping device, a pair of protruding portion pressing pieces By 28 and 28, the front-end | tip part of the protrusion part 30 of the core wire 14 is crimped | bonded with respect to the connection part 24, and it is pressed toward the connection part 24 from an outer peripheral side.

  In addition, as shown in FIG. 1, the connection of the pair of protruding portion pressing pieces 28, 28 pressed from the outer peripheral side toward the connecting portion 24 with respect to the tip end portion of the protruding portion 30 of the core wire 14. The protrusion dimension H1 from the part 24 is formed to be smaller than the protrusion dimension H2 from the connecting part 24 of the core wire crimping part 20 crimped to the core wire 14 (H1 <H2). In addition, the dimension W in the extending direction (left and right direction in FIG. 1) of the core wire 14 of the pair of protruding portion pressing pieces 28, 28 is the protruding end portion 34 from the base end portion 32 side connected to the connecting portion 24. It has a substantially tapered trapezoidal shape that gradually decreases toward the side.

  By the way, the crimp terminal 10 having such a structure can be manufactured by the following method. For example, a metal flat plate is pressed into a developed shape as shown in FIG. Next, the side walls 36a and 36c are bent from the side wall 36b that hits the bottom wall of the connecting portion 22 so as to face each other, and further, the side wall 36d that hits the continuous top wall from the side wall 36c is bent so as to face each other. As a result, the connection portion 22 having a substantially rectangular tube shape with both ends opened in the front-rear direction (left-right direction in FIGS. 1 to 3) is assembled. Finally, an unfolded state, that is, a flat plate-like connecting portion 24 is provided behind the side wall 36b that hits the bottom wall of the connecting portion 22, while an unfolded state, that is, a flat core wire crimping portion is provided behind the connecting portion 24. 20 is provided, and in a further rear side of the core wire crimping portion 20, a developed state, that is, a plate-shaped covering crimping portion 18 is provided. Then, the insulation coating 16 at the wire end of the covered wire 12 is peeled to expose the core wire 14, and the covered wire 12 at the wire end is placed on the covered crimp portion 18 and the core wire 14 is placed on the core wire crimp portion 20. The tip of the portion 30 is placed between the pair of protruding portion pressing pieces 28, 28. In such a state, the coated wire 12 is coated by crimping the coated crimping portion 18, the core wire crimping portion 20, and the connecting portion 24 using a known crimping device, as shown in FIGS. The crimp terminal 10 of this embodiment to which is connected is completed. In addition, in order to make an understanding easy, in FIG. 3, the boundary line between side wall 36a-d is described with the virtual line.

  And the crimp terminal 10 (refer FIG. 1-2) of this embodiment to which the covered electric wire 12 was connected in this way is accommodated in the terminal cavity 40 of the connector housing 38, as FIG. 4-5 shows. The connector 42 is configured by being arranged. The connector housing 38 has a substantially block shape, and is integrally formed of a synthetic resin such as polypropylene (PP) or polyamide (PA) by injection molding or the like. Six terminal cavities 40 are formed through the connector housing 38. Specifically, the terminal cavity 40 of the connector housing 38 is formed so as to extend in the front-rear direction (left-right direction in FIG. 5) and open to the front surface 44 and the rear surface 46.

  4 to 5 with respect to the terminal cavity 40 of the connector housing 38 having such a structure, the crimp terminal 10 to which the covered electric wire 12 is connected is an opening on the rear surface 46 side of the terminal cavity 40. It is arranged to be accommodated from the part. Then, the substantially hook-shaped lance 50 that protrudes inward and obliquely rearward from the upper surface 48 in the terminal cavity 40 gets over the protruding portion pressing piece 28 and the core wire crimping portion 20 of the crimp terminal 10, and the core wire crimping portion 20. By engaging with the rear end portion 52, the crimp terminal 10 is prevented from coming off from the rear surface 46 of the terminal cavity 40. In addition, in order to make an understanding easy, in FIG. 5, the crimp terminal 10 to which the covered electric wire 12 was connected is described with the virtual line.

  According to the crimp terminal 10 having such a structure, the tip end portion of the protruding portion 30 of the core wire 14 is crimped to the connecting portion 24 by the pair of protruding portion holding pieces 28, 28 and from the outer peripheral side. It is pressed toward the connecting portion 24. Therefore, it is possible to completely prevent the occurrence of the jumping deformation of the protruding portion, which has been a problem in the past, and to prevent the occurrence of a problem due to interference with other members due to the protruding protruding portion. Can be done. For example, when the crimping terminal 10 of the present embodiment to which the covered wire 12 is connected is accommodated in the terminal cavity 40 and the protruding portion 30 is springing up and deformed, the lance 50 interferes with the protruding portion 30. Thus, it is possible to prevent the lance 50 from being able to get over the core wire crimping portion 20 and being unable to engage with the rear end portion 52 of the core wire crimping portion 20 of the crimp terminal 10. In addition, since the pair of protruding portion pressing pieces 28 and 28 are formed at positions separated from the core wire crimping portion 20 toward the connecting portion 22, the pair of protruding portion pressing pieces 28 and 28 form the protruding portion 30. Even when the tip portion is pressed and covered from the outer peripheral side, it can be easily confirmed that the protruding portion 30 protrudes from the core wire crimping portion 20 to the connecting portion 22 side. Therefore, the visual confirmation of the connection state by the core wire crimping portion 20 can be easily and reliably performed depending on the presence or absence of the allowance portion 30, and the securing of the connection stability is ensured at the same time.

  In addition, since the protruding portion pressing pieces 28 are provided as a pair projecting outward from both end edges in the width direction of the connecting portion 24, the protruding size of each protruding portion pressing piece 28 can be reduced. Therefore, the pressing (crimping) step with respect to the allowance portion 30 can be performed stably with a good balance and with a small pressing force. In addition, since the extension dimension of the protruding portion 30 of the core wire 14 extended from the core wire crimping portion 20 to the connecting portion 22 side is limited, the protruding portion presser that presses the protruding portion 30 is provided. Since the piece 28 also needs to be spaced apart from the core wire crimping portion 20 in addition to the size in the extending direction of the core wire 14 being smaller than that of the core wire crimping portion 20, further allowable dimensions in the extending direction are required. Becomes smaller. In the present embodiment, the dimension W in the extending direction of the core wire 14 of the pair of protruding portion pressing pieces 28, 28 is gradually increased from the base end portion 32 side connected to the connecting portion 24 toward the projecting end portion 34 side. Since it is formed so as to be small, even if the relatively small protruding portion pressing piece 28 is pressed and deformed toward the protruding portion 30, the strength on the base end portion 32 side where stress is concentrated is reinforced. The strength and durability of the small protruding portion pressing piece 28 can be advantageously ensured.

  In addition, the protrusion dimension H1 of the pair of protruding portion pressing pieces 28, 28 is formed to be smaller than the protrusion dimension H2 of the core wire crimping part 20 from the connection part 24. From the above, in addition to preventing the protruding portion 30 from being bent up, the protruding height of the entire protruding portion 30 including the protruding portion pressing piece 28 can be made smaller than that of the core wire crimping portion 20. Yes. Thereby, it is possible to prevent interference with the other members of the allowance portion 30 more reliably.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited at all by the specific description in this embodiment. For example, in the above-described embodiment, the connection portion 22 of the crimp terminal 10 has a substantially rectangular cylindrical shape, the engagement hole 26 that opens toward the front is provided therethrough, and the connector housing 38 of the connector 42. However, the present invention is not limited to such a configuration. For example, the connection portion 22 of the crimp terminal 10 may be a flat plate having a bolt insertion hole and bolted to a power supply terminal such as a ground terminal to be electrically connected. Moreover, in the said embodiment, it forms so that the protrusion dimension: H1 from the connection part 24 of a pair of protrusion part holding pieces 28 and 28 may become smaller than the protrusion dimension: H2 from the connection part 24 of the core wire crimping part 20. However, the present invention is not limited to such a configuration. Furthermore, in the above-described embodiment, the dimension W in the extending direction of the core wire 14 of the pair of allowance portion pressing pieces 28, 28 is changed from the base end portion 32 side connected to the connecting portion 24 to the protruding end portion 34 side. Although an example in which it is formed so as to gradually become smaller has been described, it is not limited to such a configuration. In addition, in the above-described embodiment, the case having the covering crimping portion 18 has been described as an example, but the covering crimping portion 18 is not necessarily required.

10: Crimp terminal, 12: Covered electric wire, 14: Core wire, 20: Core wire crimping part, 22: Connection part, 24: Connecting part, 28: Protrusion part pressing piece, 30: Protrusion part, 32: Base end part, 34: protruding end

Claims (3)

Including a connection portion that is conductively connected to an electrical connection target, a core wire crimp portion that is crimped to a core wire of a covered electric wire, and a connecting portion that extends between the connection portion and the core wire crimp portion. In the configured crimp terminal,
In the connecting portion, at a position separated from the core wire crimping portion to the connection portion side, an allowance portion that presses the protruding portion of the core wire protruding from the core wire crimping portion to the connection portion side from the outer peripheral side. A crimp terminal having a presser piece protruding therefrom.   The protruding dimension of the protruding part pressing piece pressed by the protruding part is configured to be smaller than the protruding dimension of the core wire crimping part crimped to the core wire from the connecting part. The crimp terminal according to claim 1.   A pair of the projecting portion pressing pieces projecting outward from both end edges in the width direction of the connecting portion, and the dimension of the core wire extending direction of each of the pair of projecting portion pressing pieces is The crimp terminal according to claim 1 or 2, wherein the crimp terminal has a shape that gradually decreases from the base end side connected to the connecting portion toward the projecting end portion.

Images