JP4590226B2 - Connector structure - Google Patents

Description

  The present invention relates to a connector structure between a device that uses liquid fuel and a fuel cartridge that contains the liquid fuel.

  For example, there are combinations of fuel injection type lighters and fuel injection gas cylinders as devices and fuel cartridges that use conventional liquid fuel, and their connector structures are provided at the lighter side injection port and the gas cylinder side discharge port, respectively. A structure is generally employed in which valves are provided, both valves are opened by pressing the gas cylinders, and liquid fuel in the gas cylinders is injected into the lighter (for example, see Patent Documents 1 and 2).

  FIG. 10 is a cross-sectional view showing an example of a connector structure for injecting fuel from a gas cylinder into a conventional lighter. A plug 74 having a valve mechanism 73 is fastened to an inlet 72 formed in the main body 71 of the lighter 70, and a spindle 75 is inserted into the plug 74 so as to be able to move in and out. It is energized. The spindle 75 has a bottomed central hole 75 a and a communication hole 75 b that opens to a part of the wall surface. A ring-shaped elastic valve 77 is attached to the outer peripheral side opening of the communication hole 75 b. The outer periphery is fixed by the plug 74. A seal packing 78 is attached to the end of the spindle 75. In a non-operating state in which the spindle 75 is not pushed in, the inner peripheral surface of the elastic valve 77 is pressed against the outer peripheral surface of the spindle 75 and the communication hole 75b is closed to close the valve. When the spindle 75 is pushed in, the elastic valve 77 is bent and deformed, and the inner peripheral surface opens the communication hole 75b to open the valve.

On the other hand, the gas cylinder 80 is provided with a valve mechanism 83 having an injection rod 82 at the center of the tip of the container 81. The base of the injection rod 82 is held by a valve holder 84 and is urged in a protruding direction by a spring 85. A bottomed central hole 82a is opened from the tip protruding from the container 81, and a communication hole 82b is formed by a horizontal hole communicating with the center hole 82a. Is provided. A ring-shaped elastic valve 86 is attached to the opening portion of the communication hole 82 b on the outer peripheral surface, and the elastic valve 86 is fixed by a valve holder 84. The operation of the elastic valve 86 is the same as that of the lighter side valve mechanism 73, and the inner peripheral surface of the elastic valve 86 is pressed against the outer peripheral surface of the injection rod 82 when the injection rod 82 is not pushed in. The communication hole 82b is closed and the valve is closed. When the injection rod 82 is pushed in, the elastic valve 86 is bent and the inner peripheral surface opens the communication hole 82b to open the valve.
Japanese Utility Model Publication No. 39-14343 Japanese Utility Model Publication No. 3-35972

  In the connector structure having the conventional structure shown in FIG. 10 described above, in a connected state of the gas lighter 70 as a device that uses liquid fuel and the gas cylinder 80 as a fuel cartridge that stores liquid fuel and replenishes and injects it into the gas lighter, There is a space S in which air is accommodated between the valves 77 and 86, and there is a problem that the air is mixed into the liquid fuel when the liquid fuel is injected.

  That is, in the structure of FIG. 10, the spindle 75 and the center holes 75a and 82a of the injection rod 82 and the communication holes 75b and 82b in the respective valve mechanisms 73 and 83 are in communication with the external atmosphere and contain air. There is a large space S between the elastic valve 77 and the elastic valve 86 on the gas cylinder side. In the connected state, the space S is closed, and the air inside loses the escape space and is pushed into the lighter side together with the discharge of the liquid fuel (liquefied gas) from the gas cylinder side. In a gas lighter, liquid fuel is vaporized into gas and finally mixed with air and burned.Therefore, there is no problem with the mixing of air into the liquid fuel. In the case of anaerobic liquid fuel, there is a risk that the reaction may be hindered by the air component in the case of an anaerobic liquid fuel. You will need it.

  In addition, when the gas cylinder is separated from the device after the liquid fuel is injected, the liquid fuel or the vaporized gas accumulated in the space S is released to the atmosphere. However, in the case of liquid fuel containing non-volatile components, the liquid remains in the space without vaporizing, and the liquid fuel is removed along with the connector separation. Leaks and adheres to surrounding equipment, causing problems such as rust and corrosion.

  In view of the above points, the present invention has a structure in which a space between both valves is minimized, and a connector structure between a device and a fuel cartridge that uses liquid fuel to reduce the entry of air into the device due to fuel injection. Is intended to provide.

The connector structure according to the present invention connects the device and the fuel cartridge when supplying the liquid fuel from a fuel cartridge containing the liquid fuel in a pressurized state to the device using the liquid fuel. A connector structure comprising an injection connection portion of the fuel cartridge and a discharge connection portion of the fuel cartridge,
The injection connection portion of the device includes a valve mechanism having a stem valve biased by a spring, while the discharge connection portion of the fuel cartridge includes a valve mechanism having a stem valve biased by a spring. The stem valve moves in and out according to the connecting operation of the fuel cartridge, and opens the respective valve mechanisms. With the opening operation, the liquid fuel moves from the fuel cartridge along the fuel passage along the outer periphery of both stem valves. It is a structure that flows to the equipment,
One connection part of the device or the fuel cartridge is inserted inward of the other connection part, and the fuel passages on the outer periphery of each stem part communicate with each other by contact of the tips of the both stem valves,
Surrounding the outer periphery of the stem valve located between the tip of the one connecting portion inserted inward and the inside of the other connecting portion constitutes a fuel passage, and moves the connecting portion on the fuel cartridge side Accordingly, an elastic member that compresses and deforms accordingly is provided.

  An axial groove that constitutes a fuel passage may be provided in the stem valve or the elastic member to secure the fuel passage.

  Further, the elastic member may be made of an elastic material that can be deformed in the axial direction of the stem valve and that is not deformed by crimping on the outer peripheral surface of the stem valve. Even in this case, an axial groove constituting a fuel passage may be provided in the stem valve or the elastic member to secure the fuel passage.

  According to the present invention as described above, one connection portion of a device that uses liquid fuel or a fuel cartridge that contains liquid fuel in a pressurized state is inserted inside the other connection portion, and each stem valve The fuel passages on the outer periphery of the stem valve on both sides communicate with each other by the contact of the tip of the stem valve, and the outer periphery of the stem valve located between the tip of one connecting portion inserted inward and the inside of the other connecting portion is connected. A fuel passage is formed by surrounding and an elastic member that is compressed and deformed according to the movement of the connecting portion on the fuel cartridge side is installed, so that the liquid fuel injection start state is provided between the valve portions of the connecting portions on both sides. The amount of air present in the fuel passage is very small due to the narrow passage gap, and bubbles are not generated during the supply of the liquid fuel, and are injected without interruption, leading to a reaction by the air mixed in the liquid fuel. Impact is minimized.

  Also, when the fuel cartridge is separated from the device after the liquid fuel is injected, the liquid fuel that collects in the space between the two valves is also small, and the occurrence of harmful effects due to atmospheric discharge and leakage can be prevented.

  Hereinafter, embodiments of the present invention will be described in detail. 1 is a cross-sectional view showing a normal separation state of the connector structure according to the first embodiment, FIG. 2 is a cross-sectional view showing a contact state and a connection state of the connector structure of FIG. 1, and FIG. 3 is a second embodiment. FIG. 4 is a sectional view showing a contact state and a connection state of the connector structure of FIG. 3, and FIG. 5 is a connector structure similar to FIG. 1 using different elastic members. FIG. 6 is a sectional view showing the contact state and connection state of the connector structure of FIG. 5, and FIG. 7 is a normal separation state of the connector structure similar to FIG. 3 using different elastic members. FIG. 8 is a sectional view showing another form of the elastic member, and FIG. 9 is a sectional view of a stem portion showing another embodiment.

  The connector structure 1 of the embodiment of FIG. 1 includes an injection connection 3 of a device 2 that uses liquid fuel and a discharge connection 5 of a fuel cartridge 4 that contains liquid fuel in a pressurized state. When the liquid fuel is supplied from the cartridge 4, both the connecting portions 3 and 5 are connected.

  The injection connection part 3 of the device 2 includes a valve mechanism 30 having a stem valve 31 biased in a valve closing direction by a spring 32. On the other hand, the discharge connecting portion 5 of the fuel cartridge 4 includes a valve mechanism 50 having a stem valve 51 urged in a valve closing direction by a spring 52. Then, the tip end portion of the discharge connection portion 5 of the fuel cartridge 4 is inserted and connected to the inside of the injection connection portion 3 of the device 2, and both the stem valves 31 and 51 are immersed according to the connection operation of the fuel cartridge 4. It moves, opens each valve mechanism 30 and 50, and it has the structure where liquid fuel distribute | circulates along the outer periphery of both said stem valves 31 and 51 with the opening operation.

  Specifically, in the injection connecting portion 3 of the device 2, an injection housing 33 is fixed to an injection port 22 opened in a part of the device main body 21 via a sealing material 36, and the injection housing 33 is connected to the device main body 21. A cylindrical base portion 33a fastened to the outer side, an outer cylindrical projection portion 33b, and a partition wall portion 33c on the inner bottom of the cylindrical projection portion 33b. A recess 3A is formed inside the cylindrical projection portion 33b. A communication hole 34 is opened at the center of the partition wall 33c. An elastic body 35 made of a ring-shaped sealing material (O-ring) is disposed on the outer periphery of the communication hole 34 on the back surface of the partition wall 33c.

  The stem valve 31 is disposed at the center of the injection housing 33 so as to be movable in the axial direction. The stem valve 31 includes a rod-like stem portion 31a that passes through the communication hole 34 of the injection housing 33, and the stem portion. A valve portion 31b having an enlarged diameter is provided in a part of 31a. The valve portion 31b is provided between the back surface of the partition wall portion 33c of the injection housing 33 so as to be able to press the elastic body 35. The tip is located in the vicinity of the tip opening of the cylindrical protrusion 33 b of the injection housing 33. A spring 32 is mounted on the back portion of the valve portion 31b so that the stem valve 31 is urged in the protruding direction, that is, the valve closing direction. In a normal state, the valve portion 31b presses the elastic body 35 and is in the valve closed state. .

  Further, the elastic member 6 is installed in the inner recess 3 </ b> A of the cylindrical protrusion 33 b of the injection housing 33 so as to surround the outer periphery of the stem portion 31 a of the stem valve 31. The elastic member 6 is made of a foam whose volume can be compressed and deformed. This foam is any one of foamed rubber, foamed urethane foam, high-functional foam, and porous body, and a structure in which liquid fuel does not soak into the inside from the surface is desirable.

  When the stem valve 31 is moved backward and the valve mechanism 30 is opened, the fuel passage 3B through which the liquid fuel passes is formed along the outer periphery of the stem valve 31 and extends along the outer periphery of the stem portion 31a. From between the inner peripheral surface of the elastic member 6, through the gap between the stem portion 31 a and the communication hole 34, further through the outer periphery of the valve portion 31 b, flows into the inlet 22.

  On the other hand, the discharge connection portion 5 of the fuel cartridge 4 has a discharge housing 53 fixed to a discharge port 42 opened in a part of the container main body 41, and the discharge housing 53 is a cylindrical base 53 a fastened to the container main body 41. And an outer cylindrical protruding portion 53b and an insertion portion 53c protruding at the center of the tip of the cylindrical protruding portion 53b. A communication hole 54 is opened at the center of the insertion portion 53c. An elastic body 55 made of a ring-shaped sealing material (O-ring) is disposed on the outer periphery of the communication hole 54 on the back surface of the insertion portion 53c.

  The stem valve 51 is disposed in the center of the discharge housing 53 so as to be movable in the axial direction. The stem valve 51 includes a rod-shaped stem portion 51 a that passes through the communication hole 54 of the discharge housing 53, and the stem portion. 51a includes a valve portion 51b having an enlarged diameter. The valve portion 51b is provided between the back surface of the insertion portion 53c of the discharge housing 53 so as to be able to press the elastic body 55. The distal end is located in the vicinity of the distal end surface of the insertion portion 53 c of the discharge housing 53. A retainer member 56 is fitted to a base portion of the discharge housing 53 to which the stem valve 51 is mounted via a seal material 57, and a spring 52 is compressed between the back portion of the valve portion 51b. Thus, the stem valve 51 is urged in the protruding direction, that is, the valve closing direction, and in the normal state, the valve portion 51b presses the elastic body 55 and is in the valve closed state.

  When the stem valve 51 moves backward and the valve mechanism 50 opens, the fuel passage 5B through which the liquid fuel passes is formed along the outer periphery of the stem valve 51, and the retainer member 56 is formed from the discharge port 42. , The gas passes through the outer periphery of the valve portion 51b, and is discharged through the gap between the stem portion 51a and the communication hole 54.

  In the normal state shown in FIG. 1, that is, in the separated state, both the injection connecting portion 3 and the discharge connecting portion 5 have their valve mechanisms 30 and 50 closed, and from this state, the connector connection for liquid fuel injection is shown in FIG. a) and (b). First, as shown in FIG. 2 (a), the tip of the insertion portion 53 c is inserted inward of the cylindrical protrusion 33 b of the injection connection portion 3 of the apparatus 2 as the discharge connection portion 5 of the fuel cartridge 4 moves. The tip of the stem valve 51 comes into contact with the end face of the elastic member 6, and the stem 51 a tip of the stem valve 51 contacts the tip of the stem portion 31 a of the stem valve 31. When further inserted and moved, the distal end of the stem portion 51a of the stem valve 51 presses the distal end of the stem portion 31a of the stem valve 31 and compresses and deforms the elastic member 6 at the distal end surface of the insertion portion 53c as shown in FIG. On the other hand, the stem valves 31 and 51 of both the connecting portions 3 and 5 are respectively moved in and out, the valve portion 31b of the stem valve 31 is separated from the elastic body 35, and similarly, the valve portion 51b of the stem valve 51 is separated from the elastic body 55. . As a result, the fuel passage 3B on the outer periphery of the stem valve 31 communicates with the fuel passage 5B on the outer periphery of the stem valve 51, and the liquid fuel discharged from the fuel passage 5B in the gap between the outer periphery of the stem valve 51 of the discharge connecting portion 5 and the communication hole 54 Then, it flows into the fuel passage 3 </ b> B between the outer periphery of the stem valve 31 of the injection connecting portion 3 and the elastic member 6 and is injected into the injection port 22 of the device main body 21.

  In this liquid fuel injection start state, a small amount of air is present in the fuel passages 5B and 3B between the valve portion 51b of the discharge connection portion 5 and the valve portion 31b of the injection connection portion 3 due to the narrow passage gap. In addition, bubbles are not generated during the supply of the liquid fuel, and the bubbles are injected without interruption, and the influence of the air mixed in the liquid fuel on the reaction is minimized. Further, it is possible to prevent leakage of liquid fuel during separation after injection.

  3 and 4 show the second embodiment. The basic structure of the connector structure 10 is the same as that of the first embodiment, but the elastic member 6 is disposed on the fuel cartridge 4 side. Yes.

  The connector structure 10 of the embodiment of FIG. 3 includes an injection connection portion 13 of a device 2 that uses liquid fuel and a discharge connection portion 15 of a fuel cartridge 4 that contains liquid fuel in a pressurized state. When the liquid fuel is supplied from the cartridge 4, both the connecting portions 13 and 15 are connected.

  The injection connection part 13 of the device 2 includes a valve mechanism 130 having a stem valve 131 urged in the valve closing direction by a spring 32. On the other hand, the discharge connecting portion 15 of the fuel cartridge 4 includes a valve mechanism 150 having a stem valve 151 biased in the valve closing direction by a spring 52. Then, the tip end portion of the injection connecting portion 13 of the device 2 is inserted and connected to the inside of the discharge connecting portion 15 of the fuel cartridge 4, and both the stem valves 131 and 151 are immersed according to the connecting operation of the fuel cartridge 4. It moves, opens each valve mechanism 130 and 150, and it has the structure where liquid fuel distribute | circulates along the outer periphery of both the said stem valves 131 and 151 with the opening operation.

  Specifically, in the injection connecting portion 13 of the device 2, the injection housing 133 is fixed to the injection port 22 opened in a part of the device main body 21 via the sealing material 36, and the injection housing 133 is connected to the device main body 21. A cylindrical base portion 133a fastened to the outer side, an outer cylindrical protruding portion 133b, and an insertion portion 133c protruding at the center of the tip of the cylindrical protruding portion 133b, and a communication hole 134 is opened at the center of the insertion portion 133c. Has been. An elastic body 135 made of a ring-shaped sealing material (O-ring) is disposed on the outer periphery of the communication hole 134 on the back surface of the insertion portion 133c.

  The stem valve 131 is disposed at the center of the injection housing 133 so as to be movable in the axial direction. The stem valve 131 includes a rod-like stem portion 131a that passes through the communication hole 134 of the injection housing 133, and the stem portion. A valve portion 131b having an enlarged diameter is provided in a part of 131a. The valve portion 131b is provided between the back surface of the insertion portion 133c of the injection housing 133 so as to be able to press the elastic body 135, and the stem portion 131a. The distal end is located in the vicinity of the distal end surface of the insertion portion 133c of the injection housing 133. A spring 32 is compressed on the back of the valve portion 131b, and the stem valve 131 is urged in the protruding direction, that is, in the valve closing direction. In a normal state, the valve portion 131b presses the elastic body 135 and is in the valve closed state. .

  When the stem valve 131 moves backward and the valve mechanism 130 opens, the fuel passage 13B through which the liquid fuel passes is formed along the outer periphery of the stem valve 131, and the stem portion 131a and the communication hole 134 are formed. Through the outer periphery of the valve part 131b, and flows into the inlet 22 through the gap.

  On the other hand, the discharge connection portion 15 of the fuel cartridge 4 has a discharge housing 153 fixed to a discharge port 42 opened in a part of the container body 41, and the discharge housing 153 is a cylindrical base portion 153 a fastened to the container body 41. And an outer cylindrical projection 153b and a partition wall 153c on the inner bottom of the cylindrical projection 153b. A recess 15A is formed inside the cylindrical projection 153b, and is formed at the center of the partition 153c. A communication hole 154 is opened. An elastic body 155 made of a ring-shaped sealing material (O-ring) is disposed on the outer peripheral portion of the communication hole 154 on the back surface of the partition wall portion 153c.

  In addition, the stem valve 151 is disposed in the center of the discharge housing 153 so as to be movable in the axial direction. The stem valve 151 includes a rod-shaped stem portion 151a that is inserted through the communication hole 154 of the discharge housing 153, and the stem portion. A valve portion 151b having an enlarged diameter is provided at a part of 151a. The valve portion 151b is provided between the back surface of the partition wall portion 153c of the discharge housing 153 so as to be able to press the elastic body 155. The tip is located in the vicinity of the tip opening of the cylindrical protrusion 153b of the discharge housing 153. A retainer member 56 is fitted to a base portion of the discharge housing 153 to which the stem valve 151 is mounted via a seal material 57, and a spring 52 is compressed between the back portion of the valve portion 151b. Thus, the stem valve 151 is urged in the protruding direction, that is, the valve closing direction, and in the normal state, the valve portion 151b presses the elastic body 155 and is in the valve closed state.

  Further, the elastic member 6 is installed in the inner recess 15 </ b> A of the cylindrical projecting portion 153 b of the discharge housing 153 so as to surround the outer periphery of the stem portion 151 a of the stem valve 151. The elastic member 6 is made of the same foam as the previous example.

  When the stem valve 151 moves backward and the valve mechanism 150 opens, the fuel passage 15B through which liquid fuel passes is formed along the outer periphery of the stem valve 151, and the retainer member 56 is formed from the discharge port 42. Through the inside of the valve portion 151b, through the outer periphery of the valve portion 151b, through the gap between the stem portion 151a and the communication hole 154, through the inner peripheral surface of the elastic member 6 along the outer periphery of the stem portion 151a, and discharged from the tip portion thereof. To do.

  In the normal state of FIG. 3, that is, in the separated state, the valve mechanisms 130 and 150 of both the injection connecting portion 13 and the discharge connecting portion 15 are in the closed state. a) and (b). First, as the discharge connection portion 15 of the fuel cartridge 4 is connected and moved, as shown in FIG. 4A, the tip of the insertion portion 133 c in the injection connection portion 13 of the device 2 is the cylindrical protrusion 153 b of the discharge connection portion 15. The tip of the stem valve 151 comes into contact with the end surface of the elastic member 6, and the tip of the stem portion 151 a of the stem valve 151 and the tip of the stem portion 131 a of the stem valve 131 come into contact with each other. When further inserted and moved, the distal end of the stem portion 151a of the stem valve 151 presses the distal end of the stem portion 131a of the stem valve 131, and the elastic member 6 is compressed and deformed at the distal end surface of the insertion portion 133c as shown in FIG. On the other hand, the stem valves 131 and 151 of the connection portions 13 and 15 are respectively moved in and out, the valve portion 131b of the stem valve 131 is separated from the elastic body 135, and similarly, the valve portion 151b of the stem valve 151 is separated from the elastic body 155. . As a result, the fuel passage 13B on the outer periphery of the stem valve 131 communicates with the fuel passage 15B on the outer periphery of the stem valve 151, and the liquid fuel discharged from the fuel passage 15B between the outer periphery of the stem valve 151 of the discharge connection portion 15 and the elastic member 6 Flows into the fuel passage 13 </ b> B in the gap between the outer periphery of the stem valve 131 and the communication hole 134 of the injection connection portion 13 and is injected into the injection port 22 of the device main body 21.

  In this liquid fuel injection start state, the air present in the fuel passages 15B and 13B between the valve portion 151b of the discharge connection portion 15 and the valve portion 131b of the injection connection portion 13 is very small because the passage gap is narrow. In addition, bubbles are not generated during the supply of the liquid fuel, and the bubbles are injected without interruption, and the influence of the air mixed in the liquid fuel on the reaction is minimized.

  In this embodiment, when the fuel cartridge 4 is disposable, the elastic member 6 only needs to have durability until the injection of the stored liquid fuel is completed, and the long-term durability in the case of the device 2 side is sufficient. Not required.

  FIG. 5 is a cross-sectional view showing a connector structure 1 similar to FIG. 1 using an elastic member 6A having a different form, and FIG. 6 is a cross-sectional view showing a connection process thereof. Reference numerals are assigned and explanations thereof are omitted.

  In the above-described embodiment, the elastic member 6 is formed of a foam having a closed cell structure. Instead, the elastic member 6A attached to the recess 3A in FIG. 1 is a rubber material as shown in FIG. It is made of an elastic material such as This elastic member 6A has a structure in which a flange portion 61 is provided at both ends of a pipe-shaped cylinder portion 62, and an inner hole 65 of the cylinder portion 62 is formed so as to expand in the central portion so as to extend in the axial direction. It is the structure which controls the deformation | transformation to the inner side of the inner hole 65 at the time of compression deformation.

  When the elastic member 6A is attached to the inner concave portion 3A of the cylindrical projection 33b of the injection housing 33 in the injection connection portion 3, the stem portion 31a of the stem valve 31 is inserted into the inner hole 65 of the cylindrical portion 62, and the flange portions at both ends are inserted. 61 is located at the bottom and opening of the recess 3A, and forms a narrow fuel passage 3B between the inner hole 65 of the cylindrical portion 62 and the outer periphery of the stem portion 31a.

  When the connector is connected as shown in FIGS. 6A and 6B, the distal end of the insertion portion 53 c moves inward of the injection connection portion 3 as the discharge connection portion 5 of the fuel cartridge 4 moves. The tip of the stem valve 51 is inserted into contact with the end face of the flange portion 61 of the elastic member 6A, and the tip of the stem valve 51 contacts and presses the tip of the counterpart stem valve 31. By further insertion movement, both valve mechanisms 30, 50 are opened, both fuel passages 3B, 5B are communicated, and the elastic member 6A is compressed and deformed at the distal end surface of the insertion portion 53c. As shown, the cylindrical portion 62 is deformed so as to bulge outward during the compression, restricting deformation to the inner side of the inner hole 65, preventing the close contact with the stem portion 31a, and closing the fuel passage 3B. It has a structure to secure.

  FIG. 7 is a sectional view showing an example in which the elastic member 6A as shown in FIG. 8A is applied to the connector structure 10 having the form as shown in FIG. In the structure in which the distal end portion of the injection connecting portion 13 of the device 2 is inserted and connected to the inside of the discharge connecting portion 15 of the fuel cartridge 4, the same elastic member as the inner recess 15A of the cylindrical projecting portion 153b of the discharge housing 153 6A is installed and performs the same connection operation as in FIGS. 4A and 4B. In this case, the elastic member 6A is deformed so that the cylindrical portion 62 swells outward during compression as described above. The inner hole 65 is prevented from being deformed to the inner side, and is prevented from being in close contact with the stem portion 151a to ensure that the fuel passage 15B is not blocked.

  FIG. 8 shows a modification of the elastic member, and these elastic members 6A to 6C are deformed elastic materials that can be deformed in the axial direction of the stem valve 31 and that are not deformed by crimping on the outer peripheral surface of the central stem portion 31a. It is configured.

  The elastic member 6A in the example of FIG. 8A has a structure in which the flange portions 61 are provided at both ends of the pipe-shaped cylinder portion 62 as described above, and the inner hole 65 of the cylinder portion 62 has an inner diameter at the central portion. It is formed to expand so as to expand, restricting deformation to the inner side of the inner hole 65 at the time of compressive deformation in the axial direction, preventing contact with the stem portion, and securing a fuel passage.

  The elastic member 6B in the example of FIG. 8B has a structure in which flange portions 61 are provided at both ends of a pipe-shaped cylinder portion 63, and the inner hole 65 of the cylinder portion 63 is enlarged and formed so that the inner diameter expands at the center portion. Furthermore, it is formed in a barrel shape so that the outer peripheral surface of the cylinder part 63 spreads out in the center part, and the cylinder part 63 is deformed to the outside during compression deformation in the axial direction. The fuel passage is secured by regulating the deformation.

  The elastic member 6C in the example of FIG. 8C has a structure in which flange portions 61 are provided at both ends of a pipe-like cylinder portion 64, and the inner hole 65 of the cylinder portion 64 is enlarged and formed so that the inner diameter expands in the center portion. The outer peripheral surface of the cylindrical portion 64 is configured to have an annular groove and overlapped ring bodies, so that the cylindrical portion 64 is deformed outward during compression deformation in the axial direction. The fuel passage is secured by restricting the deformation to the inside.

  FIG. 9 is a structural example for securing the fuel passage 3B between the elastic member 6 and the stem valve 31 in the example of FIG. 1 (the same applies to the example of FIG. 3), and compressive deformation of the elastic member 6 in the above-described embodiment. Occasionally, the gap between the elastic member 6 and the outer peripheral surface of the stem portion 31a, that is, the fuel passage 3B is blocked to prevent the liquid fuel from being blocked.

  In other words, in the example of FIG. 9A, the groove 17 extending in the axial direction of the stem valve 31 is formed on the inner peripheral surface of the elastic member 6, and the liquid fuel passage is formed by this groove 17 even when the elastic member 6 is compressed and deformed. It is a structure to ensure.

  In the example of FIG. 9B, a groove 18 extending in the axial direction is formed on the outer peripheral surface of the stem portion 31 a of the stem valve 31, and the groove 18 ensures a liquid fuel passage even when the elastic member 6 is compressed and deformed. It is.

  The structure for securing the fuel passage can also be applied to the structures of FIGS. 5 to 7 using elastic members 6A to 6C as shown in FIG.

Sectional drawing which shows the normal isolation | separation state of the connector structure concerning the 1st Embodiment of this invention, Sectional drawing which each shows the contact state and connection state of the connector structure of FIG. Sectional drawing which shows the normal isolation | separation state of the connector structure concerning 2nd Embodiment, Sectional drawing which each shows the contact state and connection state of the connector structure of FIG. Sectional drawing which shows the normal isolation | separation state of the connector structure similar to FIG. 1 using a different elastic member, Sectional drawing which each shows the contact state and connection state of the connector structure of FIG. Sectional drawing which shows the normal isolation | separation state of the connector structure similar to FIG. 3 using a different elastic member, Sectional drawing which shows each other form of an elastic member, Sectional drawing of the stem part which shows another Example, It is sectional drawing which shows the example of the conventional connector structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 10 Connector structure 2 Equipment 3, 13 Injection connection part 4 Fuel cartridge 5, 15 Discharge connection part 6, 6A-6C Elastic member 3A, 15A Recess 3B, 13B, 5B, 15B Fuel passage 21 Equipment main body 22 Inlet port 30, 130 Valve mechanism 31, 131 Stem valve 31a, 131a Stem part 31b, 131b Valve part 32, 52 Spring 33, 13 Injection housing 33b, 133b, 153b Cylindrical protrusion 34, 134 Communication hole 35, 135 Elastic body 41 Container body 42 Discharge port 50, 150 Valve mechanism 51, 151 Stem valve 51a, 151a Stem portion 51b, 151b Valve portion 53, 153 Discharge housing 53c, 133c Insertion portion 54, 154 Communication hole 55, 155 Elastic body

Claims (3)

When the liquid fuel is supplied from a fuel cartridge containing liquid fuel in a pressurized state to a device that uses liquid fuel, the device and the fuel cartridge are connected to each other. A connector structure comprising a discharge connection portion of the cartridge,
The injection connection portion of the device includes a valve mechanism having a stem valve biased by a spring, while the discharge connection portion of the fuel cartridge includes a valve mechanism having a stem valve biased by a spring. The stem valve moves in and out according to the connecting operation of the fuel cartridge, and opens the respective valve mechanisms. With the opening operation, the liquid fuel moves from the fuel cartridge along the fuel passage along the outer periphery of both stem valves. It is a structure that flows to the equipment,
One connection part of the device or the fuel cartridge is inserted inward of the other connection part, and the fuel passages on the outer periphery of each stem part communicate with each other by contact of the tips of the both stem valves,
Surrounding the outer periphery of the stem valve located between the tip of the one connecting portion inserted inward and the inside of the other connecting portion constitutes a fuel passage, and moves the connecting portion on the fuel cartridge side An elastic member that compresses and deforms accordingly is installed ,
While compressing and deforming the elastic member at the distal end surface of the one connection portion, both the stem valves move into and out of each other, and the fuel passage extends from the inner peripheral surface of the elastic member along the outer periphery of the stem portion. A connector structure formed and communicated along the outer periphery of the stem portion therebetween . The connector structure according to claim 1, wherein an axial groove constituting a fuel passage is provided in the stem valve or the elastic member. 3. The connector structure according to claim 1, wherein the elastic member is made of an elastic material having a structure that is deformable in an axial direction of the stem valve and that is not crimp-deformed on the outer peripheral surface of the stem valve. .

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