JP5432919B2 - Second cover for mold case type electrical device - Google Patents

Description

  The present invention relates to a case for an electrical protection device of the kind, for example a circuit breaker, in particular a case that can be used in a molded case type product. In fact, the present invention more particularly relates to a second cover equipped in such a device. In fact, the case of such a device is, in principle, a base that forms a cover for the components that give the device its function and a cover called the first cover, and a top surface of the first cover on which the operating lever grows. It is comprised by the cover called the 2nd cover which rotates.

  The rotation is performed between an open position that exposes the entire front surface and a closed position that covers the front surface. The second cover, in particular, covers the auxiliary device incorporated in the case in the space provided on the side of the central pit for guiding the movement of the operation lever after the first cover is closed. Yes. The central pit protrudes from the front surface of the cover, and both ends thereof reach connection terminals for input and output that are not generally covered by the second cover.

  In a configuration known today, the second cover is pivotally attached to the first cover at one end thereof by a hinge articulating the second cover and near its free end, for example, the free cover It was secured in the folded position by clips or screws, generally two in number, placed near the two corners of the end.

  This type of molded product has a problem, and when the circuit needs to be interrupted, the subsequent arc extinction creates a very large mechanical pressure, especially when it is rated against the second cover Used for. In that case, the arc extinguishing pressure acts both on the hinge and on the fixed point located on the opposite side.

  High mechanical stresses at the axial level of the hinge, which is a mechanical connection with relative movement between the two parts, and thus often a structural lack of suitability to withstand severe stress without damage, is It can lead to hinge damage. On the other hand, the presence of such a large stress necessitates the provision of a strong fixing means, which is sometimes cumbersome for the operator (screws).

  In the premise of the present invention, the case is provided with a second cover that can withstand repeated pressure in a closed position against pressures resulting from high shut-off capacity without causing any special problems. In addition, the cover has an operation for fixing to the first cover at a single operation point so that the first cover can be locked or unlocked by a one-touch operation.

In order to satisfy these standards, the case of the present invention including a base, a first cover, and a second cover that rotates on the front surface of the first cover, in principle,
The hinge of the second cover rotating on the first cover comprises a coaxial end pin arranged laterally on one end side of the second cover, the pin being parallel to the front plane; The inside of the recess of the first cover can be rotated and slid along the plane formed.
The first cover and the second cover are locked when the second cover is folded with the second cover in contact with the first cover; The second cover includes a one-touch operation means for sliding on the first cover between the release position and the release position.

  That is, the essential contribution of the present invention is to establish a one-touch operation means for locking / unlocking the second cover with respect to the first cover at a plurality of points. This is done by manipulating translational movement on the first cover relative to the second cover. This is why the hinges required to rotate the second cover on the first cover must, on the other hand, also be able to participate in sliding movements.

  According to one possibility, in particular by ensuring a sliding movement, the fixing means are at least two surfaces each belonging to the first cover and the second cover, the second cover being folded. Are parallel to each other and have a surface that slides in contact with each other when sliding to the locked position, the surfaces being parallel or nearly parallel to the front surface of the first cover, The surface belonging to the second cover slides under the other surface.

  The relative orientation and arrangement of the surface is a force that acts at right angles to the front surface of the product and pushes off the second cover, in this case the lock is against the force that is the resultant force of the pressure. It is explained from what must be done. That is, the drag of the fixing means needs to act in the opposite direction of the same direction.

  According to one possibility, the front surface comprises at least two protruding hook-type fastening systems provided to cooperate with the inner edge of the second cover.

  More specifically, each hook may consist of a transverse small wall cut into the base of the surface opposite the hinge, the small wall further comprising its outer surface. And is preferably positioned to guide the sliding of the second cover along the front surface of the first cover.

  The small wall / hook is preferred because the resistance against the pressure force generated during arc extinguishing is localized closer to the free end of the second cover when the second cover is in the folded position. Is located near the edge.

  However, if the only locking means is that small wall located near the free side of the second cover, the hinge pin will also be involved in the lock. As a result, the hinge is subjected to mechanical stress that can eventually damage the hinge.

  In the present invention, that is why the second cover is actually provided with four hook-type fastening systems, including two located by the hinge.

  According to the corresponding configuration, the second cover has a transverse claw arranged near the hinge pin, and its base of the L-shaped section is provided on the wall of the first cover protruding from the front surface. In cooperation with a transverse groove formed on the opposite side of the hinge.

  As mentioned above, the hinge must be able to rotate and slide simultaneously. From that point of view, the hinge recess has approximately the same width as the pin diameter, together with a play that allows sliding, the length of the recess being the distance that allows the locking means to operate. It is set so that the movement of can be completed.

  According to one possibility, the pin has a flat surface that assumes an orientation different from that of the front surface when the second cover is folded. Under this premise, the recess is provided with an opening at one of its axial ends whose width is less than the diameter of the pin and which exceeds the diameter cut off at the flat surface portion.

  The presence of the flat surface and the opening and its direction allows the removal of the second cover when the second cover is not folded or not hanging, i.e. not opened 180 °. Is.

  Preferably, the flat surface is oriented in a direction perpendicular to the plane of the front surface at the position where the second cover is folded. In this case, the cover removal function is effective when the cover is oriented 90 ° from the closed position. This is the position where the pin can be moved most easily in the recess, especially in the removal opening. This is because the cover can be grasped under optimum conditions. Furthermore, this direction is the most natural direction for removal, considering that the device is often housed in a dense cabinet.

  Preferably, the bottom of each recess is provided with a ridge at the opening that obstructs the removal of the second cover.

  This obstacle passage that makes it difficult to pull out and remove the second cover gives a tactile clue to the operator during the removal operation and confirms the intention of the removal. This obstruction obstructs the cover from being unintentionally removed during a 180 ° rotation operation for the purpose of exposing the front surface of the first cover.

  At the beginning of this specification, a one-touch operating means for sliding and fixing the second cover is described.

  According to the present invention, the operating means for sliding is a screw that is disposed in the second cover and is guided to rotate over a quarter of a turn. According to one possible configuration, the eccentric protrusion protrudes from the axial end of the screw body and performs sliding by cooperating with a transverse groove provided in the front face of the first cover.

  Alternatively, the free end of a boss disposed on the second cover and guided over a quarter turn that forms a cam that cooperates with the transverse wall of the first cover in the unlocked position. And two radial ribs having at least a linear support zone for each of the first and second covers in the locked position, thereby being adjusted perpendicular to the front surface. You can get guidance. In that case, these ribs are out of angle on both sides of the diametric surface so as to generate a couple to confirm the lock when internal pressure is generated in the space between the first cover and the second cover. Preferably it is.

  In the second premise, in the closed position, the screw holds the second cover even if the second cover is opened by the force of the internal pressure. In fact, rib displacement creates a couple that acts in the direction of closure. If the guide is perpendicular to the front surface, it can also be seen that another screw in the axial direction parallel to the front surface can cause the screw to come out of the hole and eventually result in the same result, i.e., unlocking the second cover. Prevent occurrence.

  The rotation of the screw is limited to a quarter rotation, whereby the rotational movement of the screw is converted into a translational movement of the second cover, in particular in a form guided by hinges and fixed walls. By operating the screw in one direction, the entire fixing means can be activated simultaneously. If the rotation operation is performed in the opposite direction, all these means are released simultaneously.

  According to one possibility, the second cover is provided with a transparent window, which is slidably attached to two side sliders of an opening provided in the cover for receiving it.

  This window protects a zone for providing information and makes it possible to visualize the zone. For example, a nameplate specific to a product can be provided in the zone. This nameplate is arranged in the zone of the first cover and does not suffer any movement and should therefore be independent of the sliding movement of the second cover.

  Therefore, the window includes two protrusions that block the window when the second cover is slid so as to enter the hole provided in the first cover when the second cover is folded.

  Preferably, these side sliders are provided with ridges that obstruct the sliding of the window when the second cover is open.

  Finally, in order to be able to seal the covers together with lead in some cases, the second cover is provided with axial legs with holes, which are integral with the first cover in the operating position of the fixing means. It corresponds to the hole of the second leg.

  Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

It is a perspective view of a circuit breaker having a case constituted by a base, a first cover and a second cover according to the present invention. It is a perspective view of the same circuit breaker as FIG. 1 without a 2nd cover. FIG. 3 is a view of the elements of FIG. 2 from another angle. It is an expansion perspective view of the hollow of the hinge protruded from the 1st cover. It is a perspective view of the 2nd cover seen from the top. It is the figure which looked at the 2nd cover same as FIG. 5 from the bottom. It is the figure which showed the double motion of rotation and rotation given to a 2nd cover when opening a 2nd cover. It is the figure which showed each step of opening of the 2nd cover especially including the removal position of 90 degrees.

  The circuit breaker illustrated in FIG. 1 comprises a case, which in this case is a mold, constituted by a base (1) and a first cover (2) placed thereon, and these two elements of the case Forms the main covering of the circuit breaker components. When the second cover (3) illustrated in a state of being rotated to a slightly opened position is folded, the second cover (3) covers the first cover (2).

  The second cover (3) has a central hole (4) through which the operation lever (5) of the circuit breaker passes. The circuit breaker also comprises input / output connection means (6, 7) as usual.

  FIGS. 2 to 6 show a possible configuration of a hinge that is exposed to a pre-applied stress and a means for securing the second cover (3) to the first cover (2).

  The hinge in the strict sense is actually the pins (8) disposed on both ends of the end portion (9) of the second case (3) on both sides of the case, and the case (3) It consists of a pin that forms a rotating shaft.

  These pins (8) are recessed (10) provided in the flange (15) projecting from both side ends of the front surface (11) of the second cover (2) projecting over the connecting means (7). Collaborate with. These recesses (10) are designed not only to allow the pin (8) to rotate there, but also to slide when the second cover (3) is folded onto the front surface (11). The movement is performed in the direction of arrow (F) in FIG.

  In fact, the diameter of the pin (8) is sufficiently less than the length of the recess (10) so that it can slide, while it can be rotated and controlled in rotation. In addition, the width of the recess (10) is substantially the same except for play for operation.

  When the second cover (3) is folded so as to contact the first cover (1), the pin (8) is oriented at right angles to the plane (4) of the front surface (11) in the case of the figure. It has a flat surface (12). The role of the flat surface (12) is as follows. When the second cover (3) is rotated by 90 ° as shown in FIG. 10, for example, the diameter of the pin (8) cut and reduced is actually in the rear part of the recess (10). It faces the provided opening (13) (see FIG. 4).

  The height of these openings (13) allows the pin (8) to pass through when the pin (8) is in a position with its flat surface (12) facing upward. At that time, as shown in FIG. 11, the second cover (3) can be removed. Apart from that, a ridge (14) is provided at the opening (13) of each recess (10), and unless a deliberate operation is given to the second cover (3), the first This is an obstacle that prevents the 2 cover (3) from coming off.

  When there is no such operation, the rotation in the recess (10) can be continued, and the second cover can be freely suspended as shown in FIG.

  In practice, the rotation of the second cover (3) occurs when the fixing means is not activated, i.e. on the wall of the recess (10) where the pin (8) is located on the opposite side of the opening (13). This is possible only when the second cover slides on the first cover (2) until it comes into contact. In the position where it can be seen in FIG. 8, in this position the rotation shown in FIG. 9 or 1 can be started. On the other hand, when the second cover (3) is in the position of FIG. 7 in contact with the flange (15) surrounding the recess (10), the fixing means is operated there, so that no rotation is possible. This fixing means, which can be seen for example in FIG. 2, is constituted in this figure by two small walls (16) and a notch (17) arranged in the vicinity of the connecting means (6) and (7), respectively. The

  The small wall (16) also has a cut (18) in the same direction as the cut (17). These incisions (17, 18) are provided to cooperate with the respective inner edges (19) and (20) of the second cover (3), but these inner edges are actually covered. It is an inner claw that is oriented parallel to the front surface (11) when (3) is folded. The inner edges (19) and (20) fit into the cuts (17) and (18), respectively, when the second cover (3) is slid in the direction of the arrow (A) shown in FIG. Then, the fixing means is activated, and thereafter, the second cover (3) cannot be rotated at all with respect to the first cover (2).

  The sliding operation means comprises a quarter-turn screw (21). In the illustrated embodiment, the screw is a uniaxial protrusion (22) prepared to cooperate with a transversely elongated front slit (23) facing in the transverse direction, which provides rotational movement of the screw (21). It has a uniaxial protrusion (22) at its free end that converts it into translational movement of the second cover (3). As described above, other systems may be used, such as a boss disposed at the free end of the screw to form a cam that cooperates with the transverse wall of the first cover. In this configuration, in order to prepare for the accidental opening of the second cover when a large pressure is generated between the two covers, a means for ensuring the closing is further provided.

  Further, the second cover (3) as shown in FIG. 5 includes a window (33) that covers the zone (24) that needs to be seen even when the second cover (3) is in the closed position. Since this zone (24) is fixed with respect to the first cover (2), it is a window (33) coupled to the second cover (3), but keeps facing the zone (24). In order to achieve this, it is necessary to avoid the influence of the sliding movement of the second cover (3).

  Therefore, the side wing (25) of the window (33) slides in the side slider (26) of the opening of the second cover prepared for receiving the window (33). The window (33) is assumed to remain fixed with respect to the first cover (2) and the zone (24) while the second cover (3) slides, and from the lower surface of the window (33). A protruding protrusion (27) is provided to cooperate with the cut (28) in the zone (24). When the second cover (3) slides, the protrusion (27) is retained in the cut (28) with respect to the direction of movement. As a result, the window (33) slides relative to the second cover (3). On the other hand, the mechanical association does not prevent the window (33) from continuing to be interlocked with the second cover (3) at the turning stage.

  The second cover (3) also includes an axial leg (29) having a through hole (30) at the end. When the second cover (3) slid in its fixed direction in contact with the first cover (2), the hole (30) was opened in the second leg (32) integral with the first cover. Responds to lead seals that are coaxial with the corresponding holes (31).

Claims (15)

A case for an electrical protection device, such as a circuit breaker, comprising a base (1) and a first cover (2) forming a cover of the device, and a first cover (2) having an operating lever (5) In a case for an electrical protection device comprising a second cover (3) rotating between an open position exposing the front face (11) on the front face (11) and a closed position covering it.
A coaxial end pin in which a hinge of the second cover (3) rotating on the first cover (2) is arranged laterally on one end (9) side of the second cover (3). (8), and the pin (8) rotates and slides in the recess (10) of the first cover (2) along a plane parallel to the plane of the front surface (11). And the first cover (2) and the second cover (3) were in a state where the second cover (3) was in contact with the first cover (2). When squeezed, the second cover (3) slides on the first cover (2) between a lock position for operating the fixing means and a lock release position for disabling the means and enabling rotation. With one-touch operation means to move ,
The fixing means are at least two surfaces respectively belonging to the first cover (2) and the second cover (3), and are parallel to each other when the second cover (3) is folded. , When sliding to the locked position, the surface has a sliding surface in contact with each other, the surface has a direction parallel to or close to the front surface (11) of the first cover (2), The surface belonging to the second cover (3) slides under the surface of the first cover (2) ;
Wherein the front (11) comprises at least two said second cover (3) projecting hook type fastening system which is arranged to cooperate with the inner edge (19, 20) of (16, 17, 18) A case for an electrical protection device , characterized in that Each of the hooks comprises a transverse small wall (16) with a notch (18) in the base of the surface opposite the hinge, and the small wall (16) is on the outer surface of the first wall. Case for an electrical protection device according to claim 1 , characterized in that it is positioned to guide the sliding of the second cover (3) along the cover (2). Case for electrical protection device according to claim 2 , characterized in that the small wall (16) is arranged near the free end of the second cover (3). The second cover (3) comprises four hook type fixing systems (16, 17, 18), including two hook type fixing systems (17) arranged beside the hinges, case for an electrical protection apparatus according to any one of claims 1 to 3. The second cover (3) has an inner edge (19) disposed near the pin (8) of a hinge, and the base of the L-shaped cross section projects from the front surface (11). cover adapted to cooperate with notches (17) in the transverse direction is provided on the wall surface of (2), characterized in that the notches (17) have the mouth open on the side opposite to the hinge, wherein A case for the electrical protection device according to Item 4 . Said recess plants hinge (10) has combined a play which allows sliding of approximately the same width as the diameter of the pin (8), the length of the recess locations (10) of the fixing means A case for an electrical protection device according to any one of the preceding claims, characterized in that it is set so that it can be moved a distance that enables operation. The pin (8) has a flat surface that takes an orientation different from the orientation of the front surface (11) when the second cover (3) is folded, and the recess (10) has an axial end thereof. One of the preceding claims, characterized in that it comprises an opening (13) whose width is less than the diameter of the pin (8) and exceeds the diameter cut off at the flat surface (12) part. A case for an electrical protection device according to claim 1. Electrical protection according to claim 7 , characterized in that the flat part (12) is oriented in a direction perpendicular to the plane of the front face (11) at a position where the second cover (3) is folded. Case for equipment. The bottom of each said recess (10) is provided with a ridge (14) at the opening (3) that obstructs the removal of the second cover (3). Or a case for the electrical protection device according to 10; The sliding operating means is a screw (21) that is disposed in the second cover (3) and is guided to rotate over a quarter of a rotation, and its eccentric protrusion (22) is the screw (21). (21) Projecting from the shaft end of the trunk portion, the first cover (2) is adapted to cooperate with a transverse groove (23) provided on the front surface (11). A case for an electrical protection device according to any one of the preceding claims. The sliding operating means is a screw (21) disposed on the second cover (3) and guided over a quarter of a turn, in the transverse direction of the first cover (2) in the unlocked position A screw having a boss forming a cam that cooperates with the wall surface at its free end, and at least a linear support zone for each of the first cover (2) and the second cover (3) in the locked position; Two ribs in the radial direction, obtaining a guide adjusted in a direction perpendicular to the front surface (11), and inside the space between the first cover (2) and the second cover (3) as to generate a couple of forces to ensure the locking when the pressure occurs, characterized in that it consists of a rib are offset angles on both sides of the diametral plane, to any one of claims 1 9 Case for the electrical protection device described. The second cover (3) is provided with a transparent window (33), and the two side sliders (26) of the opening provided in the cover (3) for receiving the window (33). A case for an electrical protection device according to any one of the preceding claims, characterized in that it is slidably mounted on the electrical protection device. The window (33) enters the hole (28) provided in the first cover (2) when the second cover (3) is folded, so that the second cover (3) 13. Case for an electrical protection device according to claim 12 , characterized in that it comprises two protrusions (27) that block the window (33) when slid. When said that the second cover (3) is open, characterized in that the slide is an obstacle to uplift the window (33) is provided on the lateral slide (26), according to claim 12 or 13 Case for electrical protection device as described in. The second cover (3) is provided with axial legs (29) with holes (30) so that the second cover (3) can be sealed with lead in some cases, The hole (30) corresponds to the hole (31) of the second leg (32) integral with the first cover (2) in the operating position of the fixing means. A case for an electrical protection device according to any one of the preceding claims.

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