NEEDLE-EQUIPPED OUTER CYLINDER AND METHOD FOR MANUFACTURING SAME
FIG5 is a longitudinal cross-sectional view of an outer cylinder member used in the needle-equipped outer cylinder of the present invention
As illustrated in FIG5, the outer cylinder member 2 is provided with the outer cylinder main body 21 filled with the medicine solution and the distal end joint 22 to which the joining member 4 is fixedly joined. The outer cylinder main body 21 is formed into a substantially cylindrical shape having an inner accommodating portion. A flange 23 is formed on a proximal end side in the axial direction of the outer cylinder main body 21. That is, the outer cylinder member 2 is a syringe outer cylinder member capable of being filled with the medicine solution.
longitudinal cross-sectional view
28
projection
24
portion
17
pressing member
22
distal end joint
48
abutment portion
2
outer cylinder member
45
heat welded portion
21
outer cylinder main body
25
portion
27
cylinder portion accommodating portion
49
needle tube locking portion
26
inner cavity
33
proximal end
23
flange
['1. A needle-equipped outer cylinder comprising: a needle tube; a joining member including a needle tube accommodation hole for accommodating a proximal end side portion of the needle tube and a joining outer peripheral portion provided on an outer peripheral portion of the needle tube accommodation hole; and an outer cylinder member provided with a distal end joint including an inner cavity capable of receiving the joining outer peripheral portion of the joining member from a distal end side, wherein the needle tube accommodation hole penetrates the joining member from a distal end of the joining member to a proximal end of the joining member, the outer cylinder member is provided with a projection provided on a proximal end portion of the inner cavity and projecting in the inner cavity, the joining member is provided with an abutment portion which abuts the projection of the outer cylinder member on a proximal end portion of the joining member, at least the joining outer peripheral portion of the joining member is inserted into the inner cavity of the distal end joint of the outer cylinder member, and the abutment portion of the joining member abuts the projection of the outer cylinder member, and the joining outer peripheral portion of the joining  member includes a heat welded portion formed in a position on a proximal end side by a predetermined length from a distal end of the distal end joint of the outer cylinder member, the joining outer peripheral portion of the joining member is fixedly joined to an inner peripheral surface of the distal end joint on an outer peripheral portion of the heat welded portion and is fixedly joined to an outer peripheral surface of the needle tube on an inner peripheral portion of the heat welded portion.', '4. The needle-equipped outer cylinder according to any one of claim 1 to 3, wherein the joining member is provided with a needle tube locking portion provided on a proximal end portion of the needle tube accommodation hole to lock a proximal end of the needle tube.', '9. The needle-equipped outer cylinder according to any one of claims 1 to 8, wherein the outer cylinder member is a syringe outer cylinder member including an outer cylinder main body capable of being filled with medicine solution.', '12. A method for manufacturing a needle-equipped outer cylinder provided with a needle tube, a joining member including a needle tube accommodation hole for accommodating the needle tube and a joining outer peripheral portion provided on an outer peripheral portion of the needle tube accommodation hole, and an outer cylinder member provided with a distal end joint including an inner cavity capable of receiving the joining outer peripheral portion of the joining member, the method for manufacturing the needle-equipped outer cylinder comprising: a preparing step of preparing the outer cylinder member provided with a projection projecting in the inner cavity  on a proximal end portion of the inner cavity, the joining member provided with an abutment portion which abuts the projection of the outer cylinder member on a proximal end portion, and the needle tube; an assembling step of assembling the needle tube, the joining member, and the outer cylinder member such that the needle tube is inserted into or inserted to be fixed to the needle tube accommodation hole of the joining member, the joining member is inserted into the distal end joint of the outer cylinder member, and the abutment portion of the joining member abuts the projection of the outer cylinder member; and a welding step of heat welding the joining outer peripheral portion of the joining member to an inner peripheral surface of the distal end joint of the outer cylinder member and an outer peripheral surface of the needle tube by allowing the needle tube to generate heat by a heat generating device to allow the needle tube to generate heat while pressing a distal end portion of the joining member in a proximal end direction of the joining member by a pressing member.']