Cord stopper and shape

Abstract

A cord stopper (1A) comprises a receptacle (20), a plug (30), and a spring (40). The receptacle includes a circumferential wall (21) arranged along a Z-direction to surround a receptacle space (S); a bottom section (22) arranged on the opposite side in the Z-direction with respect to the receptacle space and supporting the spring; a pair of first receptacle-side cord entry openings (231) extending through the circumferential wall and opposite each other in a Y-direction; and a first opening (26A) and a second opening (26B) extending through the circumferential wall and opposite each other in the X-direction.The connector comprises: a connector body (31) arranged to be inserted through an insertion opening (SA); and a first connector-side cord insertion opening (311) extending through the connector body in the Y-direction and capable of being opposite the pair of first connector-side cord insertion openings in the Y-direction. The connector body and the spring arranged in the receiving space are at least partially free in the X-direction through the first and second openings from the circumferential wall.

Description

TECHNICAL AREA

[0001] The present invention relates to a cord stopper and a mold. STATE OF THE ART

[0002] A cord stopper is known in which the position of a cord body is adjustable. For example, a cord stopper disclosed in patent literature 1 comprises a cylindrical receptacle, a plug inserted into the receptacle, and a spring that biases the plug toward one side of the receptacle. In this cord stopper, a cord body is inserted through respective through-holes in the receptacle and the plug and held between the plug and the receptacle by the elastic force of the spring. QUOTE LIST PATENT LITERATURE

[0003] Patent Literature 1: US Patent No. 4,453,292 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0004] However, in order to manufacture the cord stopper disclosed in patent literature 1, the receiver and the plug must be formed separately with appropriate molds and then assembled, which requires effort for parts management, assembly and the like.

[0005] The aim of the invention is to provide a cord stopper that is suitable for reducing the effort required for the manufacture of the cord stopper. MEANS TO SOLVENT THE PROBLEM(S)

[0006] A cord stopper according to one aspect of the invention comprises: a receptacle defining an insertion opening that opens on one side in an axial direction, and a receiving space connected to the insertion opening; a plug movable in the axial direction relative to the receptacle through the insertion opening; and a spring arranged between the receptacle and the plug in the axial direction and elastically deformable in the axial direction, wherein the receptacle comprises: a circumferential wall arranged along the axial direction to surround the receiving space; a bottom section arranged on the other side in the axial direction with respect to the receiving space and supporting the spring;a pair of first receiving-side cord entry openings extending through the circumferential wall in a thickness direction to be opposite each other in the thickness direction, the thickness direction being orthogonal to the axial direction; and a first opening and a second opening extending through the circumferential wall in a width direction to be opposite each other in the width direction, the width direction intersecting both the axial direction and the thickness direction, the connector comprising: a connector body arranged to be inserted through the entry opening;and a first plug-side cord insertion opening, which extends through the plug body in the thickness direction and is suitable for being positioned opposite the pair of first plug-side cord insertion openings in the thickness direction, and the plug body and the spring arranged in the receiving space are at least partially exposed in the width direction by the first opening and the second opening from the circumferential wall.

[0007] In the manufacture of the cord stopper configured as described above, sections of the cord stopper located outside the receiving space (e.g., an outer shape of the receptacle and a non-receptacled section of the plug body) can be formed using a fixed die and a movable die positioned opposite each other in the thickness direction. Furthermore, sections of the cord stopper located within the receiving space (e.g., an inner shape of the receptacle and a received section of the plug body) can be formed using one or two sliding cores inserted through at least one of the first openings or the second openings. Thus, the receptacle and the plug can be formed simultaneously in a connected state using a single die.Therefore, it is not necessary to assemble the receptacle and plug, thus reducing the effort required to manufacture the cord stopper. The spring can be formed simultaneously with the receptacle and plug using the single mold, or it can be assembled with the receptacle and plug later.

[0008] In the above-mentioned aspect of the invention, it is advantageous if a dimension in the thickness direction of the first opening and the second opening is larger than a dimension in the thickness direction of the plug body and the spring. According to such a configuration, the sections of the cord stopper arranged in the receiving space can be shaped appropriately. Furthermore, when the spring is mounted later, it can easily be inserted into the receiving chamber through the first or second opening.

[0009] In the above aspect of the invention, it is advantageous that in the circumferential wall the first opening and the second opening are each formed in an area that is wider in the axial direction than the pair of first receiving-side cord insertion openings. According to such a configuration, it is possible to ensure the axial dimensions of the sections of the cord stopper arranged in the receiving space in a suitable manner.

[0010] In the above-mentioned aspect of the invention, the plug can be connected to the bottom section of the receptacle via the spring, and the receptacle, the plug and the spring can be formed in one piece from a plastic material. With this configuration, the cord stopper can be formed as a whole using a single mold, eliminating the need for assembly and simplifying its manufacture. It should be noted that the phrase "the receptacle, plug, and spring are integrally formed" means that the receptacle, plug, and spring form a single, integrated component.

[0011] In the above-mentioned aspect of the invention, the plug can be arranged at a distance from an edge section of the opening of the receptacle over the entire circumference. In such a configuration, damage can be adequately prevented, since one circumferential surface of the plug body has no protrusion that prevents the plug from falling off.

[0012] In the aforementioned aspect of the invention, the spring can have at least one bent section that is bent back in the thickness direction or the width direction. In such a configuration, the spring can be elastically deformed in the axial direction in a suitable manner.

[0013] In the above-mentioned aspect of the invention, the receiver can further comprise a pair of second receiver-side cord entry openings, which are positioned on the other side in the axial direction with respect to the pair of first receiver-side cord entry openings and extend through the circumferential wall in the thickness direction; the plug can further comprise a second plug-side cord entry opening, through which the plug body extends in the thickness direction, and be suitable for being opposite the pair of second receiver-side cord entry openings in the thickness direction; and when the spring is in an unloaded state, the pair of first receiver-side cord entry openings and the second plug-side cord entry opening can be positioned such that they are opposite each other in the thickness direction. In such a configuration, the pair of first receiving-side cord entry openings and the second plug-side cord entry opening can be formed together using the fixed and movable molds. That is, the second plug-side cord entry opening, which is to be formed in the receiving section of the plug body, can be formed using both the fixed and movable molds. This makes it possible to manufacture the cord stopper, into which the cord body can be inserted from two positions, in a suitable manner.

[0014] In the aforementioned aspect of the invention, the spring can be a coil spring that is a separate element from the receptacle and the connector. In this case, the spring is subsequently assembled with the receptacle and the connector.

[0015] In the aforementioned aspect of the invention, the connector can further comprise: first projections extending laterally from the connector body and arranged to bear against an edge section of the insertion opening of the receptacle in the axial direction on one side; and second projections positioned axially on the opposite side relative to the first projections and extending laterally from the connector body. In such a configuration, the connector can be suitably prevented from falling out of the receptacle both before and after the spring is installed.

[0016] A mold according to a further aspect of the invention, configured for forming one of the cord stoppers described above, wherein the mold comprises: a fixed mold; a movable mold arranged to be movable in the thickness direction relative to the fixed mold; and one or two sliding cores arranged to be movable in the width direction relative to the fixed mold, wherein the fixed mold and the movable mold are configured to form sections of the cord stopper located outside the receiving space between them, and wherein the one or the two sliding cores are configured to form sections of the cord stopper located in the receiving space through at least one of the first opening or the second opening. The shape described above achieves advantageous effects similar to those of the cord stopper of the invention described above. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view showing a cord stopper according to a first exemplary embodiment. Fig. Figure 2 is a front view showing the cord stopper according to the first exemplary embodiment. Fig. Figure 3 is a side view showing the cord stopper according to the first exemplary embodiment. Fig. Figure 4 is a cross-sectional view showing the cord stopper according to the first exemplary embodiment. Fig. Figure 5 shows a form for shaping the cord stopper according to the first exemplary embodiment, which shows a view along a section line VV in Fig. 6 is. Fig. Figure 6 shows the shape for forming the cord stopper according to the first exemplary embodiment, which shows a view along a section line VI-VI in Fig. 5 is. Fig. Figure 7 shows the shape for forming the cord stopper according to the first exemplary embodiment, which shows a view along a section line VII-VII in Fig. 5 is. Fig. Figure 8 is a side view showing a cord stopper according to a second exemplary embodiment. Fig. Figure 9 is a front view showing a cord stopper according to a third exemplary embodiment. Fig. Figure 10 is a side view showing the cord stopper according to the third exemplary embodiment. Fig. Figure 11 is a cross-sectional view showing the cord stopper according to the third exemplary embodiment. Fig. Figure 12 is a view showing a shape for forming the cord stopper according to the third exemplary embodiment. Fig. Figure 13 is a front view showing a cord stopper according to a fourth exemplary embodiment. Fig. Figure 14 is a side view showing the cord stopper according to the fourth exemplary embodiment. Fig. Figure 15 is a view showing a shape for forming the cord stopper according to the fourth exemplary embodiment. Fig. Figure 16 is a front view showing a cord stopper according to a fifth exemplary embodiment. Fig. Figure 17 is a side view showing the cord stopper according to the fifth exemplary embodiment. DESCRIPTION OF THE FORM(S)

[0017] A variety of embodiments of the invention are described below with reference to the accompanying drawings. It should be noted that in the second and subsequent embodiments, the same reference codes are used for components that are configured similarly to those in the first embodiment, and their descriptions are omitted or simplified. First exemplary embodiment

[0018] As in the Fig. As shown in Figures 1 to 4, a cord stopper 1A of the first exemplary embodiment comprises a receptacle 20, a plug 30, and a spring 40. The cord stopper 1A is a fastening device that can be attached to a cord body at a desired position along its longitudinal direction, and the cord body is held between the receptacle 20 and the plug 30, with the plug 30 moving axially relative to the receptacle 20. It should be noted that the term "cord body" is a general term referring to a cord-like body, such as an ordinary string, wire, rope, tape, or belt. For example, a cord body with a diameter of about 3 to 5 mm can be used in the cord stopper 1A, although cord bodies with other diameters are also usable.

[0019] The following describes the configuration of the cord stopper 1A according to the exemplary embodiment. In the cord stopper 1A of the exemplary embodiment, the receptacle 20, the plug 30, and the spring 40 are integrally formed from a single plastic material. That is, the cord stopper 1A of the exemplary embodiment is designed as an integral component.

[0020] In the following description: a direction in which the plug 30 moves relative to the receiver 20 (i.e., the axial direction of the cord stopper 1A) is defined as the Z direction; a direction that is orthogonal to the Z direction and in which the cord body is inserted through the cord stopper 1A is defined as the Y direction; and a direction that is orthogonal to both the Y direction and the Z direction and represents a width direction of the cord stopper 1A (i.e., a left-right direction of the cord stopper 1A) is defined as the X direction.

[0021] The receptacle 20 has an overall hollow rectangular parallelepiped shape and defines an insertion opening SA, which opens on one side in the Z-direction (a + Z-side), and a receiving chamber S, which is connected to the insertion opening SA. The receptacle 20 comprises a perimeter wall 21, which is arranged along the Z-direction to surround the receiving chamber S, and has a bottom section 22, which is arranged on the other side in the Z-direction (a - Z-side) with respect to the receiving chamber S. The perimeter wall 21 comprises a pair of side walls 23A and 23B, which are opposite each other across the receiving chamber S in the Y-direction, and a pair of bridge sections 24A and 24B, which are opposite each other across the receiving chamber S in the X-direction.

[0022] The side walls 23A and 23B each have a plate shape arranged along the X and Z directions, respectively. Each side wall 23A and 23B has a first cord entry opening 231 and a second cord entry opening 232 extending through the circumferential wall 21 in the Y direction. The first cord entry opening 231 and the second cord entry opening 232 are spaced apart in the Z direction, with the first cord entry opening 231 positioned on the +Z side relative to the second cord entry opening 232. The first cord entry openings 231 of the side walls 23A and 23B are positioned opposite each other in the Y direction. Similarly, the second cord entry openings 232 of the side walls 23A and 23B are positioned opposite each other in the Y direction. The first cord insertion opening 231 and the second cord insertion opening 232 are each openings through which the cord body is inserted. The respective shapes of the first cord insertion opening 231 and the second cord insertion opening 232 are not particularly restricted, and the first cord insertion opening 231 and the second cord insertion opening 232, for example, each have a circular cross-sectional shape. Furthermore, it is advantageous that the cross-sectional shape of the first cord insertion opening 231 has a size that allows the cord body inserted through the first cord insertion opening 231 to move smoothly in the Y-direction. The same applies to the cross-sectional shape of the second cord insertion opening 232.

[0023] Bridge sections 24A and 24B are positioned on the +Z side with respect to side walls 23A and 23B and connect these side walls. An opening 26A, described later, is formed between bridge section 24A and bottom section 22, and an opening 26B, described later, is formed between bridge section 24B and bottom section 22. Additionally, each bridge section 24A and 24B has a connector stop surface 241 facing the +Z side.

[0024] In the circumferential wall 21 described above, the +Z-side ends of the side walls 23A and 23B and the bridge sections 24A and 24B form an edge section 25 that surrounds the insertion opening SA of the receiving space S. The edge section 25 has an R-shape (round shape) on each of the side walls 23A and 23B and the bridge sections 24A and 24B and is positioned close to the connector 30, which is inserted through the insertion opening SA, in both the X and Y directions. A gap is defined between the edge section 25 and a connector body 31, which allows the connector 30 to move in the Z direction, and the edge section 25 can guide the movement of the connector 30 in the Z direction.

[0025] The base section 22 has a plate shape, arranged along the X and Y directions. The base section 22 is connected to the -Z-side ends of the side walls 23A and 23B and defines a boundary on a -Z side of the receiving space S. A base surface 221, which is a +Z-side surface of the base section 22, is connected to the spring 40. That is, the base section 22 supports the spring 40.

[0026] The connector 30 is arranged such that it is movable in the Z-direction relative to the receptacle 20 through the insertion opening SA. The connector 30 comprises the connector body 31, which is inserted through the insertion opening SA, and a head 32, which is provided at a +Z-side end of the connector body 31.

[0027] The connector body 31 has a plate shape arranged along the X and Z directions. In an unloaded state of the connector 30, the connector body 31 comprises a section located within the receiving space S (hereinafter referred to as the "received section 31P") and a section located outside the receiving space S (hereinafter referred to as the "non-received section 31N") (see Fig. 3) The spring 40 is connected to a -Z-side end of the received section 31P of the connector body 31, and the connector 30 is supported by the bottom section 22 of the receptacle 20 via the spring 40.

[0028] The connector body 31 has a first cord insertion opening 311 and a second cord insertion opening 312, which extend through the connector body 31 in the Y direction. The first cord insertion opening 311 and the second cord insertion opening 312 are spaced apart in the Z direction, with the first cord insertion opening 311 being positioned on the +Z side relative to the second cord insertion opening 312. The first cord entry opening 311 is formed in the unreceived section 31N of the connector body 31, and the second cord entry opening 312 is formed in the received section 31P of the connector body 31. Furthermore, in an unloaded state of the connector 30, the second cord entry opening 312 is positioned such that it is opposite the pair of first cord entry openings 231 of the receptacle 20 in the Y-direction. The respective shapes of the first cord insertion opening 311 and the second cord insertion opening 312 are not particularly restricted, and the first cord insertion opening 311 and the second cord insertion opening 312 have similar cross-sectional shapes to the first cord insertion opening and the second cord insertion opening of the receiver.

[0029] The head 32 has a substantially plate-like shape, arranged along the X and Y directions. The head 32 is a section pressed by a user of the cord stopper 1A and includes a pressure surface 321 facing the +Z side. Furthermore, the X-direction dimension of the head 32 is larger than the X-dimension of the plug body 31. Therefore, the head 32 has a contact surface 322 suitable for bearing against the plug stop surfaces 241 of the bridge sections 24A and 24B.

[0030] The spring 40 is arranged between the bottom section 22 of the receptacle 20 and the connector 30 in the receiving space S and connects the receptacle 20 and the connector 30. In particular, a -Z-side end of the spring 40 is connected to the bottom section 22 of the receptacle 20, and a +Z-side end of the spring 40 is connected to the connector 30. Furthermore, the spring 40 has at least one curved section 41 that extends from the bottom section 22 of the receptacle 20 towards the connector 30 and is bent back in the X-direction, thereby forming a so-called bellows shape.

[0031] The cord stopper 1A described above has a configuration suitable for injection molding. In particular, the receptacle 20 has openings 26A and 26B extending through the circumferential wall 21 in the X-direction. Through opening 26A, which corresponds to a first opening of the invention, the receptacled section 31P of the connector body 31 and the spring 40 are exposed in the -X-direction from the circumferential wall 21. Through opening 26B, which corresponds to a second opening of the invention, the receptacled section 31P of the connector body 31 and the spring 40 are exposed in the +X-direction from the circumferential wall 21.

[0032] The connector body 31 and the spring 40 have the same thickness in the Y direction. In particular, a Y-direction dimension D1 of the connector body 31 and the spring 40 is smaller than a Y-direction distance between the side walls 23A and 23B, i.e., a Y-direction dimension D2 of each of the openings 26A and 26B. In other words, the Y-direction dimension D2 of each of the openings 26A and 26B is larger than the Y-direction dimension D1 of each of the connector bodies 31 and the springs 40 (see Fig. 3). Furthermore, a gap G defined in the Y direction between the plug body 31 and each of the side walls 23A and 23B (as well as between the spring 40 and each of the side walls 23A and 23B) is connected to the openings 26A and 26B in the X direction.

[0033] The function of the line stopper 1A of the exemplary embodiment is essentially similar to that of a typical line stopper. For example, when a cord body is attached to the cord stopper 1A, a user applies pressure in the -Z direction to the head 32 of the plug 30, causing the spring 40 to deform elastically in the Z direction and the plug 30 to move in the -Z direction. Corresponding to this movement of the plug 30, the pair of first cord entry openings 231 of the receptacle 20 and the first cord entry opening 311 of the plug 30 are aligned in the Z direction (simultaneously, the pair of second cord entry openings 232 of the receptacle 20 and the second cord entry opening 312 of the plug 30 are aligned in the Z direction). The cord body is then inserted through each of the aligned first cord entry openings 231 and 311 and the aligned second cord entry openings 232 and 312.

[0034] Then, when the pressure exerted on the plug 30 is released, the spring 40 returns to its original shape, and the plug 30 moves in the +Z direction. Corresponding to this movement of the plug 30, the positions of the pair of first cord entry openings 231 of the receptacle 20 and the position of the first cord entry opening 311 of the plug 30 are displaced relative to each other in the Z direction (similarly, the positions of the pair of second cord entry openings 232 of the receptacle 20 and one position of the second cord entry opening 312 of the plug 30 are displaced relative to each other in the Z direction). As a result, the cord body is held between the receptacle 20 and the plug 30 by an elastic force of the spring 40. When adjusting the position of the cord stopper 1A relative to the cord body, pressure can again be applied to the plug 30.

[0035] The following refers to the Fig. Sections 5 to 7 describe a mold 100 for forming the cord stopper 1A of the exemplary embodiment. In the following description, the X-direction, the Y-direction, and the Z-direction are defined based on the position of the cord stopper 1A, which is to be formed by the mold 100.

[0036] As in the Fig. As shown in Figures 5 to 7, the mold 100 comprises a fixed mold 101 and a movable mold 102, which are opposite each other in the Y direction, as well as sliding cores 103 and 104, which are opposite each other in the X direction. The movable mold 102 is arranged so that it is movable in the Y direction relative to the fixed mold 101, and the sliding cores 103 and 104 are arranged so that they are movable in the X direction relative to the fixed mold 101.

[0037] The fixed form 101 and the movable form 102 have shapes and sections of the cord stopper 1A that are symmetrical to each other in the Y-direction and are located outside the receiving space S. In particular, the fixed form 101 and the movable form 102 form a cavity between them that corresponds to the outer shape of the receiving space 20 and the unreceived section 31N of the plug 30.

[0038] Furthermore, the fixed form 101 and the movable form 102 each comprise an opening-forming section 105 corresponding to the first cord insertion opening 311 in the unreceived section 31N of the plug 30, an opening-forming section 106 corresponding to the first cord insertion opening 231 of the receptacle 20, and an opening-forming section 107 corresponding to the second cord insertion opening 232 of the receptacle 20.

[0039] Here, the opening formation section 106, which corresponds to the first cord insertion opening 231 of the receptacle 20, also corresponds to the second cord insertion opening 312 in the receptacle section 31P of the plug body 31 and is larger in the Y direction than the other opening formation section 107 (see Fig. 6 and Fig. 7) Although the respective opening-forming sections 106 of the fixed form 101 and the movable form 102 work together to create the second cord insertion opening 312 in Fig. To comply with 7, the opening formation section 106 can correspond either to the fixed shape 101 or to the movable shape 102 of the second cord insertion opening 312.

[0040] The sliding cores 103 and 104 have shapes that are essentially symmetrical to each other in the X direction, and form sections of the cord stopper 1A that are arranged in the receiving space S. In particular, the sliding cores 103 and 104 are inserted through spaces that are intended to form the openings 26A and 26B, and are arranged between the stationary form 101 and the movable form 102, thereby forming a cavity between the sliding cores and the stationary form 101 and the movable form 102, respectively, which corresponds to the receiving space 20. Furthermore, the sliding cores 103 and 104 form a cavity between themselves that corresponds to the received section 31P of the plug body 31 and the spring 40.

[0041] Using the mold 100 described above, the cord stopper 1A can be injection molded. A specific injection molding process is not particularly restricted, and a typical procedure can be used. For example, the mold 100 is assembled by inserting the sliding cores 103 and 104 into the stationary mold 101 and the movable mold 102, which are pressed together. A plastic material is then injected through a gate (not shown) formed at a desired position into each cavity of the mold 100. In this way, the receptacle 20, the plug 30, and the spring 40 are formed simultaneously.

[0042] Advantageous Effects of the First Embodiment As described above, the cord stopper 1A of the embodiment is configured to be attached to a cord body like a typical cord stopper and includes openings 26A and 26B through which the plug body 31 and the spring 40 are exposed in the receiving space S in the X direction from the circumferential wall 21. In such a configuration, sections of the cord stopper 1A located outside the receiving space S (e.g., the outer shape of the receiving space 20 and the unreceived section 31N of the plug body 31) can be formed using the fixed shape 101 and the movable shape 102, which are opposite each other in the Y direction. Furthermore, sections of the cord stopper 1A located within the receiving space S (e.g.,The inner shape of the receptacle 20, the received section 31P of the plug body 31, and the spring 40 are formed using the sliding cores 103 and 104, which are inserted through the openings 26A and 26B. Thus, the receptacle 20 and the plug 30 can be formed simultaneously in a connected state using the single mold 100. Therefore, it is not necessary to connect the receptacle 20 and the plug 30, thereby reducing the effort required to manufacture the cord stopper 1A. Furthermore, since no multiple molds are required to manufacture the cord stopper 1A of the exemplary embodiment, the initial costs required for its production can be reduced.

[0043] Furthermore, the cord stopper 1A of the exemplary embodiment is structurally easy to clean of dirt and the like. For example, foreign substances such as dust and mud can be removed through the openings 26A and 26B by washing the cord stopper 1A with water. In addition, the cord stopper 1A of the exemplary embodiment uses the spring 40, which is elastically deformable in the Z-direction. With such a configuration, no unnecessary shear forces occur between the spring 40 and the plug 30 or between the spring 40 and the receptacle 20, since the direction of movement of the plug 30 and the elastic deformation direction of the spring 40 coincide, making the spring 40 less prone to breakage.Furthermore, the cord stopper 1A of the exemplary embodiment can be easily miniaturized compared to a case in which a different pretensioning device such as an elastic plate is used which deforms elastically to expand in a direction other than the Z-direction.

[0044] In the exemplary embodiment, the Y-direction dimension D1 of each of the openings 26A and 26B is larger than the Y-direction dimension D2 of each of the plug bodies 31 and the springs 40. According to such a configuration, the sections of the cord stopper 1A arranged in the receiving space S can be suitably shaped by the sliding cores 103 and 104.

[0045] In the exemplary embodiment, each of the openings 26A and 26B in the circumferential wall 21 is formed in an area that is wider in the Z direction than the first cord insertion opening 311 and the second cord insertion openings 232. According to such a configuration, it is possible to secure the dimensions in the Z direction of the sections of the cord stopper 1A arranged in the receiving space S in a suitable manner.

[0046] In the exemplary embodiment, the plug 30 is connected to the base section 22 of the receptacle 20 via the spring 40, and the receptacle 20, the plug 30, and the spring 40 are molded in one piece from a plastic material. With such a configuration, the cord stopper 1A can be formed as a whole using a single mold 100, thus eliminating the need for assembly work and simplifying the manufacture of the cord stopper 1A. Since the plug 30 is supported by the spring 40 in the receptacle 20, the plug 30 does not require any small projections or the like to prevent it from falling out of the receptacle 20. That is, the plug body 31 only needs to have a shape that allows it to be inserted at least through the insertion opening SA. Therefore, the strength of the cord stopper 1A can be improved.

[0047] Furthermore, in the exemplary embodiment, the plug 30 and the receptacle 20 are connected only via the spring 40, and no sprue channels, gates, or the like are used to connect the receptacle 20 and the plug 30. This allows the plastic to flow smoothly into the mold 100 during the injection molding of the cord stopper 1A. Since there are no sections such as gates that could lead to stress concentrations and thus to breakage, the occurrence of gate marks in the molded cord stopper 1A or in the mold 100 can be prevented, and a high-quality cord stopper 1A can be produced reliably.

[0048] In the exemplary embodiment, the plug 30 is arranged at a distance from the edge section 25 of the opening SA of the receptacle 20 over its entire circumference. Since the circumferential surface of the plug body 31 has no projections to prevent it from falling off, as described above, damage can be adequately prevented.

[0049] In the exemplary embodiment, the spring 40, which has a plurality of sections 41 bent back in the X-direction, can be suitably elastically deformed in the Z-direction.

[0050] In the exemplary embodiment, when the spring 40 is in an unloaded state, the pair of first cord insertion openings 231 of the receptacle 20 and the second cord insertion opening 312 of the plug 30 are positioned such that they are opposite each other in the Y direction. In such a configuration, even the second cord insertion opening 312, which is to be formed in the receiving section 31P of the plug body 31, can be formed by the fixed form 101 and the movable form 102. This makes it possible to manufacture the cord stopper 1A, into which the cord body can be inserted in two positions, in a suitable manner. Second exemplary embodiment

[0051] The second exemplary embodiment of the invention is described with reference to Fig. 8 described. A cord stopper 1B of the second exemplary embodiment has a configuration that is essentially similar to that of the cord stopper 1A of the first exemplary embodiment, however, the shape of a spring 40B differs slightly from that of the spring of the first exemplary embodiment.

[0052] The spring 40B has at least one curved section 41B extending from the bottom section 22 of the receptacle 20 towards the connector 30 and folded back in the Y-direction. That is, the spring 40B has a bellows shape where the bending direction differs by 90 degrees from that of the spring 40 of the first embodiment. The overall dimension of the spring 40B in the Y-direction corresponds to the dimension of the connector body 31 in the Y-direction. Therefore, the gap G in the Y-direction between the spring 40B and each of the side walls 23A and 23B is defined as in the first embodiment.

[0053] The line stopper 1B of the second embodiment described above can achieve similar advantageous effects as the line stopper 1A of the first embodiment. Third embodiment

[0054] The third embodiment of the invention is described with reference to the Fig. 9 to 11 described. A cord stopper 1C of the third embodiment has a configuration that is essentially similar to that of the cord stopper 1A of the first embodiment, however, a spring 40C is arranged as an element separate from a receptacle 20C and a plug 30C.

[0055] The receptacle 20C comprises, as in the first embodiment, the circumferential wall 21 and the bottom section 22. The receptacle 20C further comprises a spring support section 27, which projects from the bottom surface 221 of the bottom section 22 towards the +Z side. The spring support section 27 is inserted into the spring 40C from a -Z-side end of the spring 40C.

[0056] As in the first embodiment, the connector 30C comprises the connector body 31 and the head 32. As in the first embodiment, the first cord entry opening 311 and the second cord entry opening 312 are formed in the connector body 31, penetrating the connector body 31 in the Y direction. However, in an unloaded state of the connector 30, the second cord entry opening 312 is not necessarily aligned in the Y direction with the pair of first cord entry openings 231 of the receptacle 20C.

[0057] The connector 30C further comprises a pair of first projections 33A and 33B, which project in the X direction from both sides of the connector body 31, and a pair of second projections 34A and 34B, which are arranged on the -Z side relative to the first projections 33A and 33B and project from both sides of the connector body 31 in the X direction. The first projections 33A and 33B and the second projections 34A and 34B project from the receiving section 31P of the connector body 31 and are arranged in the receiving space S.

[0058] An X-direction dimension W1 of the connector 30 including the first projections 33A and 33B is larger than an X-direction dimension W2 of the insertion opening SA (see Fig. 11) Therefore, the first projections 33A and 33B in the Z-direction are suitable for bearing against the bridge sections 24A and 24B of the receptacle 20C (i.e., against the edge section 25 of the insertion opening SA). Accordingly, the first projections 33A and 33B can prevent the plug 30C from falling out of the receptacle 20C. The first projections 33A and 33B comprise conical surfaces inclined with respect to the Z-direction. An X-direction dimension W3 of the connector 30 including the second projections 34A and 34B must only be equal to or greater than the X-direction dimension W1 of the connector 30 including the first projections 33A and 33B and is greater than the X-direction dimension W2 of the insertion opening SA.

[0059] The connector 30C further comprises a spring support section 35, which projects from a base surface 313 of the connector body 31 towards the -Z side. The spring support section 35 is inserted into the spring 40C from a +Z-side end of the spring 40C.

[0060] Spring 40C, for example, is a metal coil spring. Spring 40C is supported in a plane perpendicular to the Z-direction by the spring support sections 27 and 35 described above. Furthermore, spring 40C, which is positioned in such a way that it rests against the underside 221 of the receptacle 20C and the underside 313 of the connector 30C, deforms elastically when the connector 30C moves in the -Z direction.

[0061] The cord stopper 1C described above has a configuration suitable for injection molding the connector body 31 and the spring 40C, as in the first embodiment. In particular, the receptacle 20C has openings 26A and 26B extending through the circumferential wall 21 in the X direction. Through opening 26A, which corresponds to the first opening of the invention, the receptacled section 31P of the connector body 31 and the spring 40C are exposed in the -X direction from the circumferential wall 21. Through opening 26B, which corresponds to the second opening of the invention, the receptacled section 31P of the connector body 31 and the spring 40C are exposed in the +X direction from the circumferential wall 21. Furthermore, the gap G defined in the Y direction between the plug body 31 and each of the side walls 23A and 23B (as well as between the spring 40C and each of the side walls 23A and 23B) is connected to the openings 26A and 26B in the X direction.

[0062] The plug body 31 and the spring 40C are essentially the same size in the Y-direction. For example, a Y-direction dimension D3 of the spring 40C is smaller than a Y-direction distance between the side walls 23A and 23B, i.e., the Y-direction dimension D2 of each of the openings 26A and 26B. In other words, the Y-direction dimension D2 of each of the openings 26A and 26B is larger than the Y-direction dimension D3 of the spring 40C (see Fig. 10). The gap G defined in the Y direction between the connector body 31 and each of the side walls 23A and 23B (as well as between the spring 40C and each of the side walls 23A and 23B) is exposed in the X direction from the receptacle 20 through the openings 26A and 26B.

[0063] The functioning of the line stopper 1C of the third embodiment is essentially the same as that of a typical line stopper, as in the first embodiment.

[0064] The following describes a method for manufacturing the cord stopper 1C of the third embodiment. First, a mold 100C is produced according to Fig. 12 prepared. The mold 100C is set up to form the receptacle 20C and the plug 30C of the cord stopper 1C.

[0065] Here, the plug 30C, formed with shape 100C, is positioned in the +Z direction relative to the plug 30C of the finished cord stopper 1C. Specifically, the first projections 33A and 33B are located outside the receiving space S, and the second projections 34A and 34B are located within the receiving space S. Furthermore, the second cord entry opening 312 faces the pair of first cord entry openings 231 in the Y direction.

[0066] The form 100C comprises, like the form 100 of the first embodiment, a fixed form 101C and a movable form (not shown) which are opposite each other in the Y direction, as well as sliding cores 103C and 104C which are opposite each other in the X direction. The fixed form 101C and the movable form have shapes and sections of the cord stopper 1C that are symmetrical to each other in the Y-direction and are arranged outside the receiving space S. In particular, the fixed form 101C and the movable form form a cavity between them that corresponds to an outer shape of the receiving space 20C and the unreceived section 31N of the plug 30C. The fixed form 101C and the movable form each comprise the opening-forming sections 105 to 107, as in the form 100 of the first embodiment. The sliding cores 103C and 104C have shapes that are essentially symmetrical to each other in the X-direction, and form sections of the cord stopper 1C are arranged in the receiving space S. In particular, the sliding cores 103C and 104C are arranged in the cavity formed by the fixed form 101C and the movable form through the openings 26A and 26B and form a cavity corresponding to the receiving space 20C between the sliding cores and the fixed form 101C and the movable form, respectively. Furthermore, the sliding cores 103C and 104C form a cavity between themselves corresponding to the receiving section 31P of the plug body 31.

[0067] Next, the receptacle 20C and the connector 30C are injection molded simultaneously using mold 100C. A specific injection molding procedure is not particularly restricted, and a typical procedure can be used. For example, mold 100C is assembled by inserting the sliding cores 103C and 104C into the stationary mold 101C and the movable mold, which are clamped together. Then, plastic is injected through a sprue (not shown) into each of the cavities corresponding to the receptacle 20C and the connector 30C. In this way, the receptacle 20C and the connector 30C are formed simultaneously. The receptacle 20C and the connector 30C are in a connected state immediately after molding.

[0068] The spring 40C is then inserted into the receiving space S through the opening 26A (or the opening 26B) of the receptacle 20C. At this point, a working space for placing the spring 40C in the receiving space S can be secured by moving the plug 30C in the +Z direction until the second projections 34A and 34B of the plug 30C in the Z direction abut the bridge sections 24A and 24B of the receptacle 20C (i.e., the edge section 25 of the receiving opening SA). Furthermore, the second projections 34A and 34B prevent the plug 30C from falling out of the receptacle 20C.

[0069] The plug 30C is then pressed into the receptacle 20C in the Z-direction. At this point, the plug 30C moves forward in the Z-direction, while the chamfered surfaces of the first projections 33A and 33B push the bridge sections 24A and 24B to opposite sides in the X-direction. When the first projections 33A and 33B are positioned in the receptacle S, the bridge sections 24A and 24B return to their original shape, and the first projections 33A and 33B act as a drop stop for the plug 30C. In this state, the spring 40C is held in position by being wedged between the bottom section 22 of the receptacle 20C and the plug 30C. In this way, the cord stop 1C is formed.

[0070] According to the cord stopper 1C of the third embodiment described above, the receptacle 20C and the plug 30C can be formed simultaneously in a connected state using the single mold 100C. Therefore, it is not necessary to assemble the receptacle 20C and the plug 30C together, thus reducing the effort required for parts management. Consequently, the manufacturing effort for the cord stopper 1C of this embodiment can be reduced.

[0071] In the third embodiment, the number of first projections 33A and 33B and of second projections 34A and 34B can each be one or more. Fourth embodiment

[0072] The fourth embodiment of the invention is described with reference to the Fig. 13 to 15 described. As in the Fig. 13 and Fig. As shown in Figure 14, a cord stopper 1D of the fourth embodiment has a configuration that is essentially similar to that of the cord stopper 1A of the first embodiment, except for the shape of a receptacle 20D.

[0073] The receiving chamber 20D comprises a circumferential wall 21D arranged along the Z-direction to define the receiving space S, and a bottom section 22 similar to that of the first exemplary embodiment. The circumferential wall 21D has a shape in which a section on one side in the X-direction (e.g., the +X-side) is omitted with respect to the spring 40 of the circumferential wall 21 of the first embodiment. In particular, the circumferential wall 21D comprises a pair of side walls 28A and 28B, which are opposite each other across the receiving space S in the Y-direction, and the bridge section 24A, which connects the -X-side ends of the pair of side walls 28A and 28B.

[0074] The side walls 28A and 28B each have a substantially plate-like shape, arranged along the X and Z directions. In each of the side walls 28A and 28B, the first cord entry opening 231 is formed, extending through the circumferential wall 21D in the Y direction. In the receptacle 20D and the connector 30 of the exemplary embodiment, the second cord entry openings 232 and 312 are omitted. When the circumferential wall 21 is viewed in the Y direction (see Fig. 13), each of the side walls 28A and 28B has notches 281 cut along the +X-side sections of the connector body 31 and the spring 40.

[0075] The above-described receptacle 20D, like the first embodiment, has the opening 26A, which extends through the circumferential wall 21D in the X-direction. Through the opening 26A, the receptacled section 31P of the connector body 31 and the spring 40 are exposed in the -X-direction from the circumferential wall 21D. Furthermore, the 20D recording shows, as in Fig. Figure 14 shows a slot-shaped opening 26D formed by cutting out the circumferential wall 21D in the -Z direction to define a gap between the +X-side ends of the pair of side walls 28A and 28B. The opening 26D, corresponding to the second opening of the invention, extends through the circumferential wall 21D in the X direction and faces the opening 26A in the X direction. Through the opening 26D, the received section 31P of the connector body 31 and the spring 40 are exposed in the +X direction from the circumferential wall 21D. Furthermore, the gap G defined in the Y direction between the plug body 31 and each of the side walls 28A and 28B (as well as between the spring 40 and each of the side walls 28A and 28B) is connected to the openings 26A and 26D in the X direction.

[0076] A mold 100D for forming the cord stopper 1D of the exemplary embodiment is described with reference to Fig. The form 100D comprises a fixed form 101D and a movable form (not shown) that are opposite each other in the Y direction, as well as a single sliding core 103D. The sliding core 103D is arranged so that it is movable in the X direction relative to the fixed form 101D.

[0077] The fixed form 101D and the movable form have shapes symmetrical to each other in the Y-direction and form sections of the cord stopper 1D that are located outside the receiving space S. In particular, the fixed form 101D and the movable form form a cavity between them that corresponds to the outer shape of the receiving space 20D and the unreceived part 31N of the plug 30. The fixed form 101D and the movable form each comprise the opening-forming section 105, which corresponds to the first cord insertion opening 311 of the plug 30, and the opening-forming section 106, which corresponds to the first cord insertion opening 231 of the receiving space 20. The sliding core 103D has a shape that is substantially symmetrical to each other in the X-direction and forms the sections of the cord stopper 1D that are located in the receiving space S.In particular, the sliding core 103D is arranged in the cavity formed by the fixed form 101D and the movable form by the opening 26A. The sliding core 103D forms a cavity between itself and the fixed form 101D or the movable form, corresponding to the receptacle 20D, and a cavity corresponding to the receptacled section 31P of the connector body 31.

[0078] By using the mold 100D described above, the cord stopper 1D can be injection-molded in one piece. For example, the mold 100D is assembled by inserting the sliding core 103D into the stationary mold 101D and the movable mold, which are clamped together. A resin is then injected into the cavities in the mold 100D through gates (not shown) formed at the desired positions. Thus, the receptacle 20D, the plug 30, and the spring 40 are formed simultaneously. Therefore, in the fourth embodiment, the effort required to manufacture the cord stopper 1D can be reduced, as in the first embodiment. Fifth embodiment

[0079] The fifth embodiment of the invention is described with reference to the Fig.described in sections 16 to 17. A cord stopper 1E of the fifth embodiment has a configuration that is essentially similar to that of the cord stopper 1A of the first embodiment, except for the shape of a receptacle 20E.

[0080] The inlet 20E comprises a perimeter wall 21E, arranged along the Z-direction to define the inlet space S, and the bottom section 22, arranged on the -Z side with respect to the inlet space S. The perimeter wall 21E comprises: the pair of side walls 23A and 23B, which are opposite each other across the inlet space S in the Y-direction; a pair of bridge sections 24A and 24B, which are opposite each other across the inlet space S in the X-direction; and a pair of side walls 29A and 29B, which are opposite each other across the inlet space S in the X-direction. The opening 26A is formed between the bridge section 24A and the side wall 29A, and the opening 26B is formed between the bridge section 24B and the side wall 29B.

[0081] Here, a region in the Z-direction, in which the first cord insertion openings 231 and the second cord insertion openings 232 are formed in the circumferential wall 21E, is defined as a predetermined region R. In the exemplary embodiment, the openings 26A and 26B are configured such that, of the receiving section 31P of the connector body 31 and the spring 40, which are arranged in the receiving space S, at least sections that are positioned within the predetermined region R are exposed in the X-direction through the openings 26A and 26B. In other words, the side walls 29A and 29B are arranged such that, from the X-direction, they cover the sections of the received section 31P of the connector body 31 and the spring 40, which are positioned outside the predetermined region R and are arranged in the receiving space S.

[0082] In the exemplary embodiment, an opening 233 is formed between each of the side walls 23A and 23B and the bottom section 22, extending through the circumferential wall 21E in the Y direction. The sections of the receiving section 31P of the connector body 31 and the spring 40, which are arranged in the receiving space S, covered by the side walls 29A and 29B in the X direction, are exposed in the Y direction by the circumferential wall 21E through the respective openings 233. A region in the Z direction, in which the openings 26A and 26B are formed, and a region in the Z direction, in which the respective openings 233 are formed, are continuous in the Z direction.

[0083] The cord stopper 1E of the fifth embodiment described above can be integrally injection molded using a single mold, as in the first embodiment. For example, a fixed mold and a movable mold, opposite each other in the Y-direction, can form a portion of the cord stopper 1E sections located in the receiving space S through the openings 233, while forming sections of the cord stopper 1E located outside the receiving space S. Furthermore, a pair of sliding cores, opposite each other in the X-direction, can form the other sections of the cord stopper 1E located in the receiving space S through the openings 26A and 26B. Therefore, in the fifth embodiment, the effort required to manufacture the cord stopper 1E can be reduced as in the first embodiment. Modifications

[0084] The first to fifth embodiments described above describe preferred dimensions and shapes of the respective components. However, the invention is not limited to these and can be modified as desired. Furthermore, various components can be combined in a suitable manner in each of the embodiments described above.

[0085] In each of the exemplary embodiments described above, the width direction of each of the cord stoppers 1A to 1E is a direction that is orthogonal to both the axial and thickness directions. However, the invention is not limited to this, and the width direction can be a direction that intersects both the axial and thickness directions. For example, in the first embodiment described above, the direction in which the first cord insertion openings 231 pass through the receptacle 20 and the direction in which the openings 26A and 26B pass through the receptacle 20 are orthogonal to each other, but these directions need only intersect at least once. In such a case, the insertion direction of the sliding cores 103 and 104 can be changed to one direction (e.g., a direction inclined with respect to the X-direction) corresponding to the width direction of each of the cord stoppers 1A to 1E. Explanation of reference symbols

[0086] 1A to 1E...Cord stopper, 20, 20C, 20D, 20E...Receptacle, 21, 21D, 21E...Perimeter wall, 22...Bottom section, 221...Bottom surface, 23A, 23B, 28A, 28B, 29A, 29B...Side wall, 231...First cord entry opening (first receiver-side entry opening), 232...Second cord entry opening (second receiver-side entry opening), 233...Opening, 24A, 24B...Bridge section, 25...Edge section, 241...Plug stop surface, 26A...Opening (first opening), 26B, 26D...Opening (second opening), 27...Spring support section, 281...Notch, 30, 30C...plug, 31...plug body, 31N...unrecorded section, 31P...recorded section, 311...first cord entry opening (first plug-side entry opening), 312...second cord entry opening (second plug-side entry opening), 32...head, 321...pressure surface, 322...stop surface, 33A, 33B...first projection, 34A, 34B...second projection, 35...spring support section, 40, 40B, 40C...spring, 41, 41B...curved section, 100, 100C, 100D...shape, 101, 101C, 101D...fixed shape, 102...movable shape, 103, 103C, 103D, 104, 104C...sliding core, 105 to 107...opening formation section, G...gap, S...receiving space, SA...introduction opening. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 4,453,292

[0003]

Claims

[1] Cord stopper comprising the following: a receptacle (20, 20C, 20D, 20E) defining an insertion opening (SA) that opens on one side in an axial direction, and a receptacle space (S) that is connected to the insertion opening (SA); a plug (30, 30C) which is movable in the axial direction relative to the receptacle (20, 20C, 20D, 20E) through the insertion opening (SA); and a spring (40, 40B, 40C) arranged in the axial direction between the receptacle (20, 20C, 20D, 20E) and the plug (30, 30C) and elastically deformable in the axial direction, wherein the receptacle (20, 20C, 20D, 20E) comprises: a circumferential wall (21, 21D, 21E) arranged along the axial direction to surround the receiving space (S); a bottom section (22) arranged on the other side in the axial direction with respect to the receiving space (S) and supporting the spring (40, 40B, 40C); a pair of first plug-side cord entry openings (231) extending through the circumferential wall (21, 21D, 21E) in a thickness direction to be opposite each other in the thickness direction, the thickness direction being orthogonal to the axial direction; and a first opening (26A) and a second opening (26B, 26D) extending in a width direction through the circumferential wall (21, 21D, 21E) and opposite each other in the width direction, the width direction intersecting both the axial direction and the thickness direction, the plug (30, 30C) comprising: a plug body (31) arranged so that it can be inserted through the insertion opening (SA); and a first plug-side cord insertion opening (311) extending through the plug body (31) in the thickness direction and suitable to be opposite the pair of first receiving-side cord insertion openings (231) in the thickness direction, and the plug body (31) and the spring (40, 40B, 40C) which are arranged in the receiving space (S) are at least partially exposed in the width direction from the circumferential wall (21, 21D, 21E) through each of the first opening (26A) and the second opening (26B, 26D). [2] Cord stopper according to claim 1, wherein a dimension (D1) in the thickness direction of each of the first opening (26A) and the second opening (26B, 26D) is larger than a dimension (D2) in the thickness direction of each of the plug body (31) and the spring (40, 40B, 40C). [3] Cord stopper according to claim 1 or 2, wherein in the circumferential wall (21, 21D, 21E) each of the first opening (26A) and the second opening (26B, 26D) is formed in a region which is wider in the axial direction than the pair of first receiving-side cord insertion openings (231). [4] Cord stopper according to any one of claims 1 to 3, wherein the plug (30) is connected to the bottom section (22) of the receptacle (20, 20D, 20E) via the spring (40, 40B). and the receptacle (20, 20D, 20E), the plug (30) and the spring (40, 40B) are formed in one piece from a plastic material. [5] Cord stopper according to claim 4, wherein the plug (30) is arranged at a distance to an edge section (25) of the insertion opening (SA) of the receptacle (20, 20D, 20E) over the entire circumference. [6] Cord stopper according to claim 4 or 5, wherein the spring (40, 40B) has at least one bent section (41, 41B) which is bent back in the thickness direction or the width direction. [7] Cord stopper according to any one of claims 4 to 6, wherein the receiving (20, 20D, 20E) further comprises a pair of second receiving-side cord insertion openings (232) which are positioned on the other side in the axial direction with respect to the pair of first receiving-side cord insertion openings (231) and extend through the circumferential wall (21, 21D, 21E) in the thickness direction, the plug (30) further comprising a second plug-side cord entry opening (312) which passes through the plug body (31) in the thickness direction and is suitable to be opposite the pair of second plug-side cord entry openings (232) in the thickness direction, and When the spring (40, 40B) is in an unloaded state, the pair of first receiving-side cord entry openings (231) and the second plug-side cord entry opening (312) are positioned so that they are opposite each other in the thickness direction. [8] Cord stopper according to any one of claims 1 to 3, wherein the spring (40C) is a helical spring which is an element separate from the receptacle (20C) and the plug (30C). [9] Cord stopper according to claim 8, wherein the plug (30C) further comprises: first projections (33A, 33B) which extend in the width direction from the connector body (31) and are arranged so that they abut an edge section (25) of the opening (SA) of the receptacle (20C) in the axial direction to one side; and second projections (34A, 34B) which are positioned on the other side in the axial direction with respect to the first projections (33A, 33B) and project in the width direction from the plug body (31). [10] Mold (100, 100C, 100D) configured to form the cord stopper according to any one of claims 1 to 9, the mold comprising: a fixed shape (101, 101C, 101D); a movable form (102) arranged such that it is movable in the thickness direction relative to the stationary form (101, 101C, 101D); and one or two sliding cores (103, 103C, 103D, 104, 104C) arranged so that they are movable in the width direction relative to the stationary shape (101, 101C, 101D), where the fixed form (101, 101C, 101D) and the movable form (102) are arranged such that they form sections of the cord stopper arranged outside the receiving space (S) between them, and one or both sliding cores (103, 103C, 103D, 104, 104C) are arranged such that they form sections of the cord stopper arranged in the receiving space (S) through at least one of the first opening (26B) or the second opening (26B).

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