Patent Publication Number: US-2023136834-A1

Title: Baseball or Softball Glove

Description:
This nonprovisional application is based on Japanese Patent Application No. 2021-178042 filed on Oct. 29, 2021 with the Japan Patent Office, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a baseball or softball glove. 
     Description of the Background Art 
     Conventionally, a baseball or softball glove is required to be easy to close. Japanese Patent Laying-Open No. 2021-29572 discloses a baseball or softball glove capable of improving ease of closing. 
     The baseball or softball glove disclosed in Japanese Patent Laying-Open No, 2021-29572 includes a web. The web includes a first protrusion protruding from a thumb part toward an index finger part and a second protrusion. protruding from the index finger part toward the thumb part. The first protrusion and the second protrusion are configured to be relatively movable by opening and closing the baseball or softball glove. Thus, when the baseball or softball glove is closed, a distance between the thumb part and the index finger part can be decreased without stress. Accordingly, the thumb part and the index finger part can be sufficiently brought close to each other. Therefore, the ease of closing of the baseball or softball glove can be improved. 
     There is a room for improvement in a movable range of the web in the baseball or softball glove disclosed in Japanese Patent Laying-Open No. 2021-29572. 
     SUMMARY OF THE INVENTION 
     The present invention has been made in view of the above problem, and an object of the present invention is to provide a baseball or softball glove capable of expanding a movable range of a web. 
     A baseball or softball glove of the present invention is intended to be worn on a hand of a wearer. The baseball or softball glove includes a thumb part, an index finger part, and a web. The thumb part is configured to receive a thumb of the hand of the wearer. The index finger part is configured to receive an index finger of the hand of the wearer. The web is disposed between the thumb part and the index finger part. The thumb part and the index finger pan include a base part and a fingertip part. The web includes a first protrusion and a second protrusion. The first protrusion has a first through hole. The second protrusion has a second through hole. At least either the first through hole or the second through hole has an inclined edge that extends obliquely upward from a base of the thumb part or the index finger part on a peripheral edge forming the through hole. The first protrusion and the second protrusion are engaged with each other in a state where the first through hole and the second through hole are connected to each other in a chain shape. 
     The baseball or softball glove of the present invention can expand a movable range of the web. 
     The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a front view generally showing a configuration of a baseball or softball glove according to a first embodiment of the present invention as viewed from a ball receiving surface. 
         FIG.  2    is a rear view generally showing a configuration of the baseball or softball glove according to the first embodiment of the present invention as viewed from a back surface. 
         FIG.  3    is a left side view generally showing a configuration of the baseball or softball glove according to the first embodiment of the present invention as viewed from a thumb part. 
         FIG.  4    is a top view generally showing a configuration of the baseball or softball glove according to the first embodiment of the present invention as viewed from a fingertip. 
         FIG.  5    is a rear view generally showing a state where the thumb part and an index finger part of the baseball or softball glove according to the first embodiment of the present invention are close to each other. 
         FIG.  6    is a rear view schematically showing a configuration of a web of a baseball or softball glove according to a comparative example as viewed from a back surface. 
         FIG.  7    is a rear view schematically showing a configuration of a baseball or softball glove according to a comparative example as viewed from a back surface of a web in a state where a thumb part and an index finger part are close to each other. 
         FIG.  8    is a rear view schematically showing a configuration of a web of the baseball or softball glove according to the first embodiment of the present invention as viewed from the back surface. 
         FIG.  9    is a rear view schematically showing a configuration of the baseball or softball glove according to the first embodiment of the present invention as viewed from the back surface of the web in a state where the thumb part and the index finger part are close to each other. 
         FIG.  10    is a front view generally showing a configuration of a baseball or softball glove according to a second embodiment of the present invention as viewed from a ball receiving surface. 
         FIG.  11    is a rear view generally showing a configuration of the baseball or softball glove according to the second embodiment of the present invention as viewed from a back surface. 
         FIG.  12    is a rear view generally showing a state where the thumb part and the index finger part of the baseball or softball. glove according to the second embodiment of the present invention are close to each other. 
         FIG.  13    is a top view generally showing a configuration of a baseball or softball glove according to a third embodiment of the present invention as viewed from a fingertip. 
         FIG.  14    is a top view generally showing a state where the thumb part and the index finger part of the baseball or softball glove according to the third embodiment of the present invention are close to each other as viewed from the fingertip. 
         FIG.  15    is a front view schematically showing a configuration of a first protrusion and a second protrusion of a baseball or softball glove according to a fourth embodiment of the present invention as viewed from a ball receiving surface. 
         FIG.  16    is a front view schematically showing a configuration of a first protrusion and a second protrusion of Modification 1 in the baseball or softball glove according to the fourth embodiment of the present invention as viewed from the ball receiving surface. 
         FIG.  17    is a front view schematically showing a configuration of a first protrusion and a second protrusion of Modification 2 in the baseball or softball glove according to the fourth embodiment of the present invention as viewed from the ball receiving surface. 
         FIG.  18    is a front view schematically showing a configuration of a first protrusion and a second protrusion of Modification 3 in the baseball or softball glove according to the fourth embodiment of the present invention as viewed from the ball receiving surface. 
         FIG.  19    is a front view schematically showing a configuration of a first protrusion and a second protrusion of Modification 4 in the baseball or softball glove according to the fourth embodiment of the present invention as viewed from the ball receiving surface. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, unless otherwise specified, the same or corresponding parts are denoted by the same reference signs, and the description thereof will not be repeated. 
     First Embodiment 
     With reference to  FIGS.  1  to  4   , a configuration of a baseball or softball glove  1  according to a first embodiment of the present invention will be described. In the first embodiment of the present invention, a baseball or softball glove is exemplified as baseball or softball glove  1 . but baseball or softball glove  1  according to the first embodiment of the present invention may be a catcher&#39;s mitt, a first base mitt, or the like. 
     As illustrated in  FIGS.  1  and  2   , baseball or softball glove  1  according to the first embodiment of the present invention is worn on a hand  100  of a wearer (user). Baseball or softball glove  1  according to the first embodiment of the present invention mainly includes a finger part  2 , a body  3 , a web  4 , a plurality of ball glove laces  5 , and a hand insertion hole  6 . 
     Finger part  2  is configured to receive each finger of hand  100  of the wearer. That is, finger part  2  is configured to be receive a thumb  101 , an index finger  102 , a middle finger  103 , a ring finger  104 , and a little finger  105  of hand  100  of the wearer. Finger part  2  includes a thumb part  21 , an index finger part  22 , a middle finger part  23 , a ring finger part  24 , and a little finger part  25 . 
     Thumb part  21  is configured to receive thumb  101  of hand  100  of the wearer. Thumb part  21  and index finger part  22  include a base part BF and a fingertip part FT. Base part BF is disposed at a base of thumb pan  21 . Fingertip part FT is disposed at a fingertip of thumb part  21 . Index finger part  22  is configured to receive index finger  102  of hand  100  of the wearer. Middle finger part  23  is configured to receive middle finger  103  of hand  100  of the wearer. Ring finger part  24  is configured to receive ring finger  104  of hand  100  of the wearer. Little finger part  25  is configured to receive little finger  105  of hand  100  of the wearer. 
     Each of thumb part  21 , index finger part  22 , middle finger pan  23 , ring finger part  24 , and little finger part  25  has a bag shape so as to receive each of thumb  101 , index finger  102 , middle linger  103 , ring finger  104 , and little finger  105  of hand  100  of the wearer. 
     Body  3  is configured to receive and  100  of the wearer. Body  3  has a bag shape so as to receive hand  100  of the wearer. Body  3  is connected to thumb part  21 , index finger part  22 , middle finger part  23 , ring finger part  24 , and little finger part  25 . 
     Body  3  includes a palm part  31  disposed on a palm  106  of hand  100  of the wearer and a back of the hand part  32  disposed on a back of the hand  107  of hand  100  of the wearer. 
     Palm part  31  is connected to finger part  2 . That is, palm part  31  is connected to thumb part  21 , index finger part  22 , middle finger part  23 , ring finger part  24 , and little finger part  25 . Palm part  31  is configured to cover palm  106  of the wearer. 
     Back of the hand part  32  is connected to finger part  2 . That is, back of the hand part  32  is connected to thumb part  21 , index finger part  22 , middle finger part  23 , ring finger part  24 , and little finger part  25 . Back of the hand part  32  is configured to be along back of the hand  107  of hand  100  of the wearer. 
     Web  4  is disposed between thumb part  21 . and index finger part  22 . Web  4  is configured to cover at least a part of a region between thumb part  21  and index finger part  22 . Web  4  has a movable structure at its center. 
     Web  4  includes a first protrusion  41  and a second protrusion  42 . First protrusion  41  protrudes from thumb part  21  toward index finger part  22 . First protrusion  41  is formed integrally with thumb part  21 . Note that first protrusion  41  may be formed separately from thumb part  21 . First protrusion  41  has a first through hole H 1 . First protrusion  41  has a substantially E-shape. First protrusion  41  has a first tip T 1 . First tip T 1  is located close to index finger part  22 , and is an outer edge of a first bent part C 1  and a third bent part C 3  described later. First tip T 1  is disposed closer to index finger part  22  than a second tip T 2 . First protrusion  41  is not fixed to second protrusion  42 . That is, first protrusion  41  is not fixed by, for example, being sewn to second protrusion  42 . 
     Second protrusion  42  protrudes from index finger part  22  toward thumb part  21 . Second protrusion  42  is formed integrally with index finger part  22 . Note that second protrusion  42  may be formed separately from index finger part  22 . Second protrusion  42  has a second through hole  112 . Second protrusion  42  has a substantially U-shape. Second protrusion  42  has second tip T 2 . Second tip T 2  is located close to thumb part  21 , and is an outer edge of a second bent part C 2  described later. Second tip T 2  is disposed closer to thumb part  21  than first tip T 1 . 
     At least either first through hole H 1  or second through hole H 2  has an inclined edge that extends obliquely upward from a base of thumb part  21  or index finger part  22  on a peripheral edge forming the through hole. The peripheral edge is a part surrounding at least either first through hole H 1  or second through hole H 2 . The inclined edge is a part extending obliquely upward from the base of thumb part  21  or index finger part  22 . In the present embodiment, the inclined edge is provided on the peripheral edge forming first through hole H 1 . First protrusion  41  and second protrusion  42  are engaged with each other in a state where first through hole H 1  and second through hole H 2  are connected to each other in a chain shape. 
     First protrusion  41  and second. protrusion  42  are configured to be relatively movable by opening and closing baseball or softball glove  1 . First protrusion  41  and second protrusion  42  are configured to be locked to each other. The substantially E-shape of first protrusion  41  and the substantially U-shape of second protrusion  42  are configured to be inserted into and engaged with each other. 
     First tip T 1  and second tip T 2  are configured to e relatively movable by opening and closing baseball or softball glove  1 . A distance between first tip T 1  and second tip T 2  is configured to be changeable by opening and closing baseball or softball glove  1 . Specifically, the distance between first tip T 1  and second tip T 2  are configured to be closer when baseball or softball glove  1  is opened, and to be farther when baseball or softball glove  1  is closed. 
     First protrusion  41  includes a first extension E 1  and first bent part C 1 . First extension E 1 . extends from thumb part  21  toward index finger part  22 . First extension E 1 . extends linearly from thumb part  21  toward index finger part  22 . First bent part C 1  is bent from first extension E 1 . First bent part C 1  is bent from first extension E 1  toward the region between thumb part  21  and index finger part  22 . 
     Second protrusion  42  includes a second extension E 2  and second bent part C 2 . Second extension E 2  extends from index finger part  22  toward thumb part  21 . Second extension E 2  extends linearly from index finger pan  22  toward thumb part  21 . Second bent part C 2  is bent from second extension E 2 . Second bent part C 2  is bent from second extension E 2  toward the region between thumb part  21  and index finger part  22 . 
     First bent part C 1  is disposed closer to index finger part  22  than second bent part C 2 . First bent part C 1  is disposed closer to a back surface  8  than second extension E 2 . 
     Second bent part C 2  is disposed closer to thumb part  21  than first bent part C 1 . Second bent part C 2  is disposed closer to back surface  8  than a third extension E 3 . 
     First bent part C 1  and second bent part C 2  are configured to be locked to each other by opening and closing baseball or softball glove  1 . First bent part C 1  and second bent part C 2  are configured such that an inner end of first bent part C 1  located dose to thumb part  21  and an inner end of second bent part C 2  located close to index finger part  22  can be locked to each other. 
     First bent part C 1  may be disposed closer to a ball receiving surface  7  than second extension E 2 . 
     The shapes of first protrusion  41  and second protrusion  42  may be opposite to the shapes described above. That is, first protrusion  41  may have a substantially U-shape of second protrusion  42 , and second protrusion  42  may have a substantially E-shape of first protrusion  41 . 
     Second extension E 2  includes a tapered part TP inclined from index finger part  22  toward thumb part  21 . Tapered part TP has a tapered shape whose width decreases from index finger part  22  toward thumb part  21 . Tapered part TP is disposed on a distal end of web  4  of second extension E 2 . The distal end of web  4  is a part of web  4  dose to the fingertip. That is, tapered part TP is disposed on second extension E 2  on an opposite side of second through hole H 2 . 
     Tapered part TP is configured to be slidable on at least either first extension E 1  or first bent part C 1  by opening and dosing baseball or softball glove  1 . Tapered part TP is configured to be slidable on at least either an inner end of first extension E 1  close to a base of web  4  or an inner end of first bent part C 1  close to the base of web  4 . The base of web  4  is a part of web  4  close to body  3 . 
     First protrusion  41  includes third extension E 3 . Third extension E 3  extends from thumb part  21  toward index finger part  22 . Third extension E 3  extends linearly from thumb part  21  toward index finger part  22 . Third extension E 3  is connected to first bent part C 1 . Third extension E 3  is connected to first bent part C 1  closer to the base of web  4  than first extension E 1 . 
     Third extension E 3  extends obliquely with respect to an extending direction D 1  in which thumb part  21  extends from base part BF toward fingertip part FT, and extends away from base part BF from thumb part  21  toward first bent part C 1  in extending direction D 1 . 
     Second protrusion  42  includes a fourth extension E 4 . Fourth extension E 4  extends from index finger part  22  toward thumb part  21 . Fourth extension E 4  extends linearly from index finger part  22  toward thumb part  21 . Fourth extension E 4  is connected to second bent part C 2 . Fourth extension E 4  is connected to second bent part C 2  closer to the base of web  4  than second extension E 2 . 
     Second protrusion  42  is inserted into first through hole H 1 . At least either second extension E 2  or second bent part C 2  is inserted into first through hole H 1 . First through hole H 1  is surrounded by thumb part  21 , first extension E 1 , first bent part C 1 , and third extension E 3 . 
     First protrusion  41  is inserted into second through hole H 2 . At least either third extension E 3  or first bent part C 1  is inserted into second through hole H 2 . Second through hole H 2  is surrounded by index finger part  22 , second extension E 2 , second bent part C 2 , and fourth extension E 4 . Second through hole H 2  has a substantially rectangular shape. 
     Since first protrusion  41  is inserted into second through hole H 2  and second protrusion  42  is inserted into first through hole H 1 , first protrusion  41  and second protrusion  42  are connected to each other so as to be relatively movable. 
     Second protrusion  42  is configured to be movable in first through hole H 1 , and first protrusion  41  is configured to be movable in second through hole H 2  by opening and closing the baseball or softball glove. 
     Web  4  is configured such that a distance between an end of first protrusion  41  dose to index finger part  22  and index finger part  22  and a distance between an end of second protrusion  42  close to thumb part  21  and thumb part  21  can be changed by first protrusion  41  moving in second through hole H 2  and second protrusion  42  moving in first through hole H 1 . 
     Second extension E 2  has a smaller width than first through hole H 1 . That is, in a direction from first extension E 1  toward third extension E 3  across first through hole H 1 , the width of second extension E 2  is smaller than a hole diameter of first through hole H 1 . 
     Third extension E 3  has a smaller width than second through hole H 2 . That is, in a direction from second extension E 2  toward fourth extension E 4  across second through hole H 2 , the width of third extension E 3  is smaller than a hole diameter of second through hole H 2 . 
     First protrusion  41  includes the third bent part C 3  and fifth extension E 5 . Third bent part C 3  is bent from third extension E 3 . Third bent part C 3  is bent from third extension E 3  to an opposite side of first bent part C 1 . 
     Third bent part C 3  is disposed closer to index finger part  22  than second bent part C 2 . Third bent part C 3  is disposed closer to back surface  8  than fourth extension E 4 . 
     Third bent part C 3  and second bent part C 2  are configured to be locked to each other by opening and closing baseball or softball glove  1 . Third bent part C 3  and second bent part C 2  are configured such that an inner end of third bent part C 3  located dose to thumb part  21  and an inner end of second bent part C 2  located dose to index finger part  22  can be locked to each other. 
     Fifth extension E 5  extends from thumb part  21  toward index finger part  22 . Fifth extension E 5  extends linearly from thumb part  21  toward index finger part  22 . Fifth extension E 5  is connected to third bent part C 3 . Fifth extension E 5  is connected to third bent part C 3  closer to the base of web  4  than third extension E 3 . 
     First protrusion  41  has a third through hole H 3  closer to base part BF than first through hole H 1 . Second protrusion  42  is inserted into third through hole H 3 . At least either fourth extension E 4  or second bent part C 2  is inserted into third through hole H 3 . Third through hole H 3  is surrounded by thumb part  21 , third extension E 3 , third bent part C 3 , and fifth extension E 5 . 
     Second protrusion  42  is configured to be movable in third through hole H 3  by opening and closing baseball or softball glove  1 . In the present embodiment, second protrusion  42  is configured to be movable in first through hole H 1  or third through hole H 3  by opening and closing baseball or softball glove  1 . 
     On a distal end of first protrusion  41 , third through hole H 3  has a larger width than first through hole H 1 . On a connecting part between first protrusion  41  and thumb part  21 , third through hole H 3  has a smaller width than first through hole H 1 . 
     Third through hole H 3  is disposed closer to hand insertion hole  6  than first through hole H 1 . That is, first through hole H 1  is disposed close to the distal end of web  4 , and third through hole H 3  is disposed close to the base of web  4 . 
     First protrusion  41  has first extension E 1  above first through hole H 1 , third extension E 3  below first through hole H 1 , and fifth extension E 5  below third through hole H 3 . Second protrusion  42  has second extension E 2  above second through hole H 2  and has fourth extension E 4  below second through hole H 2 . Second extension E 2  is inserted into first through hole H 1 . Third extension E 3  is inserted into second through hole H 2 . Fourth extension E 4  is inserted into third through hole H 3 . First protrusion  41  and second protrusion  42  are engaged with each other in a state where third extension E 3  and second through hole H 2  between first through hole H 1  and third through hole H 3  are connected to each other in a chain shape. There is an inclined edge at first through hole H 1 , close to base part BF. 
     In the first embodiment of the present invention, a plurality of through holes is provided in thumb part  21  and first protrusion  41 , but only one through hole may be provided. Although one through hole is provided in index finger part  22  and second protrusion  42 , a plurality of through holes may be provided. 
     Some of ball glove laces  5  among the plurality of ball glove laces  5  are disposed across thumb part  21 , index finger part  22 , and web  4 . The other ball glove laces  5  of the plurality of ball glove laces  5  are disposed across adjacent finger parts from index finger part  22  to little finger part  25 . In baseball or softball glove  1  according to the first embodiment of the present invention, each of the plurality of ball glove laces  5  has a string shape. Note that. the configuration of each of the plurality of ball glove laces  5  is not limited to this, and may have two crossing string shapes. In addition, ball glove laces  5  need not be provided. In this case, finger part  2  may be integrally farmed. 
     Hand insertion hole  6  is an insertion port for inserting hand  100  of the wearer into baseball or softball glove  1 . Hand insertion hole  6  is configured to be inserted by hand  100  of the wearer. Hand insertion hole  6  is provided at an end of body  3 . Specifically, hand insertion hole  6  is provided at an end of each of palm part  31  and back of the hand part  32  on an opposite side of finger part  2 . Hand insertion hole  6  is provided along a wrist  108  of hand  100  of the wearer. 
     Ball receiving surface  7  is disposed on palm  106  of hand  100  of the wearer. Ball receiving surface  7  is for receiving a ball. Ball receiving surface  7  includes parts of finger part  2 , body  3 , web  4 , and bail glove laces  5 , disposed on palm  106  of hand  100  of the wearer. Palm part  31  of body  3  constitutes a part of ball receiving surface  7 . 
     Back surface  8  is disposed on back of the hand  107  of the wearer. Back surface  8  includes parts of finger part  2 , body  3 , web  4 , and ball glove laces  5 , disposed on back of the hand  107  of the wearer. Back of the hand part  32  of body  3  constitutes a part of back surface  8 . 
     In the first embodiment of the present invention, finger part  2 , body  3 , web  4 , and ball glove laces  5  include resin. Specifically, finger part  2 , body  3 , web  4 , and ball glove laces  5  are integrally produced by using resin. Here, being integrally produced means being produced with one member. 
     In the first embodiment of the present invention, it is sufficient that web  4  includes resin. Finger part  2  and web  4  may include resin. Finger part  2 , body  3 , and web  4  may include resin. 
     The resin may be made of a single material. The resin may be made of a plurality of materials. 
     The resin may be made of an elastomer that is extensible by 100% or more when a tensile test is performed with reference to the conditions of a tensile test of JIS K 6251. Here, being extensible by 100% or more means being extensible by 100% or more until the resin (sample) is broken in the tensile test. 
     Specific examples of the resin include a polyurethane-based elastomer, a polyamide-based elastomer, polyester-based elastomer, a polystyrene-based elastomer, a polyolefin-based elastomer, a vinyl chloride-based elastomer, a polybutadiene-based elastomer, and a silicone rubber. The resin may be, for example, a foam of a thermoplastic synthetic resin such as ethylene-vinyl acetate copolymer (EVA) or polyethylene, a foam or a thermosetting resin such as polyurethane (PU), or a foam of a rubber material such as natural rubber or synthetic rubber. As the synthetic rubber, polyisoprene, polybutadiene, a styrene-butadiene copolymer, an acrylonitrile-butadiene copolymer, an ethylene-propylene-diene copolymer, an ethylene-propylene copolymer, polychloroprene, an isobutylene-isoprene copolymer, and the like can be used. 
     In the first embodiment of the present invention, since finger part  2 , body  3 , web  4 , and ball glove laces  5  are integrally produced by using resin, there is no seam for sewing each of finger part  2 , body  3 , web  4 , and ball glove laces  5 . 
     As shown in  FIGS.  2  and  3   , in a state where baseball or softball glove  1  is not worn on hand  100  of the wearer, finger part  2  and body  3  are curved from the wrist to the fingertip of the wearer so as to protrude from palm  106  to back of the hand  107 . That is, in a state where baseball or softball glove  1  is not worn on hand  100  of the wearer, an arch shape of back surface  8  is maintained so as to bulge toward the back surface from the wrist to the fingertip of the wearer as indicated by a double-headed arrow in  FIG.  3   . By appropriately selecting a thickness, hardness, and the like of the resin, it is possible to maintain the arch shape of back surface  8  so as to bulge toward the back surface from the wrist to the fingertip of the wearer. 
     As shown in  FIG.  2  and  4   , in a state where baseball or softball glove  1  is not worn on hand  100  of the wearer, finger part  2  and body  3  are curved from the thumb  101  to little finger  105  of the wearer so as to protrude from palm  106  to back of the hand  107 . That is, in a state where baseball or softball glove  1  is not worn on hand  100  of the wearer, the arch shape of back surface  8  is maintained so as to bulge toward the back surface from thumb  101  to little finger  105  of the wearer as indicated by a double-headed arrow in  FIG.  4   . By appropriately selecting the thickness, hardness, and the like of the resin, it is possible to maintain the arch shape of back surface  8  so as to bulge toward the back surface from the thumb  101  to little finger  105  of the wearer. 
     Next, a method of manufacturing a baseball or softball glove  1  according to the first embodiment of the present invention will be described. 
     Baseball or softball glove  1  according to the first embodiment of the present invention is manufactured by a 3D printer (three-dimensional forming apparatus). A method of forming by the 3D printer is not limited. Examples of the method of forming by the 3D printer include material extrusion, material jetting, powder bed fusion, binder jetting, and vat photopolymerization. 
     The material extrusion is a method in which a filamentary thermoplastic resin (formation material) is melted in a nozzle, and the molten formation material is injected from the nozzle and laminated. The material extrusion is commonly called fused deposition modeling (FDM) or fused filament fabrication (FFF). 
     The material jetting is a method in which a photocurable resin is sprayed from a head and laminated while being cured with ultraviolet rays. The material jetting is commonly called ink jet type, material jetting, or MultiJet Printing (MJP). 
     The powder bed fusion is a method in which a laser beam is applied to spread powder to sinter and laminate the powder. The powder bed fusion is commonly called powder sintering, selective laser sintering (SLS), direct metal laser sintering (DMLS), electron beam melting (EBM), or selective laser melting (SLM). 
     The binder jetting is a method in which a binder (adhesive) is sprayed and fixed to spread powder and laminated. The binder jetting is commonly called ink jet type, binder jet, or color jet printing (CJP). 
     The vat photopolymerization is a method in which a laser beam is applied to a pool containing a liquid photocurable resin, and the resin is cured and laminated. The vat photopolymerization is commonly called optical shaping or (stereolithography) SLA. 
     Although an example in which linger part  2 , body  3 , web  4 , and ball glove laces  5  including resin has been described above, the material is not limited to resin. The material may be, for example, leather. 
     Next, opening and closing of baseball or softball glove  1  according to the first embodiment of the present invention will be described. 
     With reference to  FIG.  2   , the distance between first tip T 1  and second tip T 2  becomes closer by opening baseball or softball glove  1 . The distance between first tip T 1  and second tip T 2  becomes closest by most fully opening baseball or softball glove  1 . 
     With reference to  FIG.  5   , when baseball or softball glove  1  is closed, first protrusion  41  and second protrusion  42  move independently so as to overlap each other. Specifically, third extension E 3  of first protrusion  41  moves in second through hole H 2 , and second extension E 2  and fourth extension E 4  of second protrusion  42  move in first through hole H 1  and third through hole H 3 . Thus, first tip T 1  of first protrusion  41  moves so as to approach index finger part  22 , and second tip T 2  of second protrusion  42  moves so as to approach thumb part  21 . Therefore, the distance between first tip T 1  and second tip T 2  becomes farther as baseball or softball glove  1  is closed. The distance between first tip T 1  and second tip T 2  becomes farthest by most fully closing baseball or softball glove  1 . 
     With reference to  FIGS.  6  to  9   , a movable range of web  4  of baseball or softball glove  1  according to the first embodiment of the present invention will be described in comparison with a comparative example.  FIGS.  6  to  9    schematically show web  4 , thumb part  21 , and index finger part  22 . 
     With reference to  FIG.  6   , in web  4  of baseball or softball glove  1  of the comparative example, third extension E 3  extends in a horizontal direction D 2  orthogonal to extending direction D 1  When thumb part  21  and first protrusion  41  move in horizontal direction D 2 , a movable range A of web  4  is equal to a length of third extension E 3 . Movable range A of web  4  is a movable range of first protrusion  41  with respect to second protrusion  42 . 
     With reference to  FIG.  7   , in practice, when baseball or softball glove  1  of the comparative example is closed, thumb part  21  and first protrusion  41  rotate with respect to index finger part  22  and second protrusion  42 . That is, thumb part  21  and first protrusion  41  rotate as compared with when baseball or softball glove  1  is opened. Thumb part  21  and first protrusion  41  rotate at a rotation angle θ. Thus, in baseball or softball glove  1  of the comparative example, movable range A of web  4  is smaller than in a case where thumb part  21  and first protrusion  41  move in horizontal direction D 2  orthogonal to extending direction D 1 . 
     With reference to  FIG.  8   , in baseball or softball glove  1  according to the first embodiment of the present invention, third extension E 3  extends obliquely with respect to extending direction D 1 , and extends away from base part BF (see  FIG.  1   ) from thumb part  21  toward first bent part C 1  in extending direction D 1 . That is, third extension E 3  extends obliquely along a rotation direction of thumb part  21  and first protrusion  41  with respect to horizontal direction D 2  orthogonal to extending direction D 1 . 
     With reference to  FIG.  9   , when baseball or softball glove  1  according to the first embodiment of the present invention is closed, thumb part  21  and first protrusion  41  rotate at rotation angle θ with respect to index finger part  22  and second protrusion  42 . That is, thumb part  21  and first protrusion  41  rotate at rotation angle θ as compared with when baseball or softball glove  1  is opened. Thus, baseball or softball glove  1  according to the first embodiment of the present invention can prevent movable range A of web  4  from being smaller than in a case where thumb part  21  and first protrusion  41  move in horizontal direction D 2 . Therefore, baseball or softball glove  1  according to the first embodiment of the present invention can expand movable range A of web  4  as compared with baseball or softball glove  1  of the comparative example. 
     Next, operational effects of baseball or softball glove  1  according to the first embodiment of the present invention will be described. 
     In baseball or softball glove  1  according to the first embodiment of the present invention, at least either first through hole H 1  or second through hole H 2  has an inclined edge that extends obliquely upward from the base of thumb part  21  or index finger part  22  on the peripheral edge forming the through hole. First protrusion  41  and second protrusion  42  are engaged with each other in a state where first through hole H 1  and second through hole H 2  are connected to each other in a chain shape. In the present embodiment, third extension E 3  extends obliquely with respect to extending direction D 1  in which thumb part  21  extends from base part BF toward fingertip part FT, and extends away from base part BF from thumb part  21  toward first bent part C 1  in extending direction D 1 . Accordingly, the movable range of web  4  can be expanded. Thus, the distance between thumb part  21  and index finger part  22  of baseball or softball glove  1  can be easily reduced. This configuration makes it easy to open and dose baseball or softball glove  1 . 
     In baseball or softball glove  1  according to the first embodiment of the present invention, first protrusion  41  and second protrusion  42  are engaged with each other in a state where third extension E 3  and second through hole H 2  between first through hole H 1  and third through hole H 3  are connected to each other in a chain shape. In the present embodiment, second protrusion  42  is inserted into third through hole H 3 . Therefore, the ball can be prevented from passing between first protrusion  41  and second protrusion  42  as compared with a case where second protrusion  42  is inserted only into first through hole H 1 . 
     In baseball or softball glove  1  according to the first embodiment of the present invention, on the distal end of first protrusion  41 , third through hole H 3  has a larger width than first through hole H 1 . Therefore, when thumb part  21  and first protrusion  41  rotate by dosing baseball or softball glove  1 , the movable range of web  4  can be expanded. 
     Second Embodiment 
     Baseball or softball glove  1  according to a second embodiment of the present invention has a similar configuration and operational effects to those of baseball or softball glove  1  according to the first embodiment unless otherwise specified. 
     With reference to  FIGS.  10  to  12   , baseball or softball glove  1  according to the second embodiment of the present invention is different from baseball or softball glove  1  according to the first embodiment mainly in a shape of third extension E 3 . 
     In baseball or softball glove  1  according to the second embodiment of the present invention, third extension E 3  is curved so as to protrude toward fingertip part FT in extending direction D 1  in which thumb part  21  extends from base part BF toward fingertip part FT. Third extension E 3  is curved in an arc shape. Third extension E 3  is curved along the rotation direction of thumb part  21  and first protrusion  41  when baseball or softball glove  1  is closed. 
     In baseball or softball glove  1  according to the second embodiment of the present invention, third extension E 3  is curved so as to protrude toward fingertip part FT in extending direction D 1 . Therefore, when thumb part  21  and first protrusion  41  rotate by dosing baseball or softball glove  1 , the movable range of web  4  can be expanded along the rotation of thumb part  21  and first protrusion  41 . Thus, when baseball or softball glove  1  is opened and closed, thumb part  21  and index finger part  22  can be smoothly moved. This configuration makes it possible to smoothly open and close baseball or softball glove  1 . 
     Third Embodiment 
     Baseball or softball glove  1  according to a third embodiment of the present invention has a similar configuration and operational effects to those of baseball or softball glove  1  according to the first embodiment unless otherwise specified. 
     With reference to  FIGS.  13  and  14   , baseball or softball glove  1  according to the third embodiment of the present invention is different from baseball or softball glove  1  according to the first embodiment mainly in the shape of third extension E 3 . 
     In baseball or softball glove  1  according to the third embodiment of the present invention, third extension E 3  is curved so as to protrude toward back surface  8  of web  4 . Third extension E 3  is curved in an arc shape. Third extension E 3  is curved along the arch shape of back surface  8  of web  4 . 
     When the shapes of first protrusion  41  and second protrusion  42  are opposite to those described above, third extension E 3  is curved so as to protrude toward ball receiving surface  7  of web  4 . 
     In baseball or softball glove  1  according to the third embodiment of the present invention, third extension E 3  is curved so as to protrude toward back surface  8  or ball receiving surface  7  of web  4 . Therefore, when baseball or softball glove  1  is closed, the movable range of web  4  can be expanded along back surface  8  or ball receiving surface  7  of web  4 . Thus, when baseball or softball glove  1  is opened and closed, thumb part  21  and index finger part  22  can be smoothly moved. This configuration makes it possible to smoothly open and close baseball or softball glove  1 . 
     Fourth Embodiment 
     Baseball or softball glove  1  according. to a fourth embodiment of the present invention has a similar configuration and operational effects to those of baseball or softball glove  1  according to the first embodiment unless otherwise specified.  FIGS.  15  to  19    schematically show first protrusion  41  and second protrusion  42 . 
     With reference to  FIGS.  15  to  19   , baseball or softball glove  1  according to the tough embodiment of the present invention and baseball or softball glove  1  according to Modifications 1 to 4 of the present embodiment are different from baseball or softball glove  1  according to the first embodiment mainly in the shapes of first protrusion  41  and second protrusion  42 . 
     A start point SP of the inclined edge is located at any point between thumb part  21  and index finger part  22 , close to base part BF on the peripheral edge of first through hole H 1  or second through hole H 2 . An end point EP of the inclined edge only needs to be located closer to the fingertip than start point SP, and to be located at any point between base part B and fingertip part FT. The inclined edge may include not only a complete inclined part but also a flat region. The inclined edge need not be a straight line. 
     The above embodiments can be appropriately combined. 
     Although the embodiments of the present invention have been described above, it should be understood that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims, and it is intended that all modifications within the meaning and scope of the claims are included in the present invention.