as shown in the drawings , an apparatus 100 constructed in accordance with this invention includes a housing 102 with a wall 104 . the housing 102 can be made in a single piece by molding or can be made from two segments 102 a , 102 b joined together by a screw 106 . the housing can be made of a transparent material or a bottom portion 108 of the housing is transparent window 106 . housing 102 is formed with a front portion 110 including a conical extension 110 having an opening 112 . the opening 112 is preferably circular and has a diameter d . housing 102 further includes a rear wall 120 that is generally flat with a large opening 122 . opening 122 is aligned with opening 112 . the interior of the housing 102 is partitioned into three chambers 124 , 126 and 128 . a top portion 130 of the housing is removable to give access to chamber 124 . chamber 124 is used to house a removable standard battery ( typically an aaa battery ) 132 . also contained within the chamber 124 are a spring terminal 136 and a flat terminal 138 that contact the positive and negative terminals of the battery 132 in the normal manner . chamber 126 houses an electric motor 140 having a shaft 142 with a weight 144 . chamber 126 further includes a switch 148 operated by a switch cover 146 slidably mounted on wall 106 . moving the switch cover 146 in one direction closes the switch 148 which in turn provides power to the motor 140 from battery 132 . moving the switch cover 146 in the opposite direction turns the motor off . the weight 144 is not rotationally symmetrical but instead it is configured so that its center of gravity is offset from the axis of the shaft of the motor 140 . as a result , when the motor 140 is turned on , it causes the weight to rotate and this action causes the front section of the housing 102 , including conical extension 110 to vibrate laterally . preferably , the apparatus is configured so that the motor 140 rotates at about 15000 rpm and causes the conical section to vibrate gently at a small amplitude of less than 1 / 16 ″. chamber 128 houses a portion of a syringe holder 150 . as best seen in fig4 , this syringe holder 150 has an elongated portion 152 having an outer surface 154 . a semi - cylindrical longitudinal channel 156 extends through the holder 150 . the syringe holder 150 further includes an enlarged head 158 attached to one end of portion 152 . a window 160 is formed in the portion 152 adjacent to the head 158 . opposite head 158 , the portion 152 is formed with a tab 162 . the portion 152 is sized and shaped to fit through opening 122 . the tab 162 is provided to trap the portion 152 to insure that the syringe holder 150 does not fall out and get lost . the syringe holder 150 is configured so that its portion 152 can be moved back and forth axially through the chamber 128 . preferably , the channel 156 is sized and shaped to form an interference fit with the barrel of a typical syringe , such as a conventional 1 cc syringe 170 available from becton dickinson . as shown in fig2 , such a conventional syringe 170 includes a barrel 172 terminating with a replaceable needle 174 . the barrel 172 has gradations 176 to indicate the progress of an injection and the amount of fluid that has been expelled from the barrel 172 . disposed inside the barrel is a piston 178 ( see fig3 ) that is attached to a shaft 180 . the shaft 180 is terminated with a thumb pad 182 . the apparatus 100 is operated as follows . first the syringe 170 is loaded with an appropriate drug ( or any other substance that a health care provider desires to inject into a patient ). the loaded syringe is then inserted into syringe holder 150 so that its barrel 172 is held tightly and securely by the channel 156 . in this configuration , the needle 174 is completely contained within the apparatus 100 , and the health care provider , as well as the patient and others around the patient are protected from injury . in addition , the needle is hidden from view of a potentially anxious patient at all times . the barrel 172 and its gradations 176 are visible through the transparent wall 106 . next , the motor 140 is turned on by switch 148 causing the front end and conical section 110 to vibrate transversally with respect to the longitudinal axis of the syringe 170 . the tip of the conical section 110 is placed in contact with the skin of the patient at the site of injection . the vibration of the conical section is transferred to the skin of the patient and the tissues underlying the skin . the health care provider holds the apparatus 100 in this position with two fingers and then pushes the enlarged head 158 with his thumb axially toward the front of the apparatus 100 thereby causing the syringe to move forward with the needle 174 extending outwardly of the conical section 110 . since the conical section is touching the skin at the site of the injection , as the needle is advanced , it penetrates the vibrated skin and the tissues to the predetermined depth . next , the health care provider shifts his thumb from the enlarged head 158 to the thumb pad 182 and starts pushing it inward to inject the contents of the barrel . during this time , the conical section 110 keeps on vibrating thereby confusing the nerve pathways of the skin and tissues and reducing or eliminating pain to the patient . preferably the diameter d of opening 112 is sized so that is large enough to insure that as the conical section 110 vibrates , it does not touch needle 174 and therefore the vibration is not transmitted to the needle itself . the motor can be kept on until the injection is completed and the needle is withdrawn , or can be turned off any time before or after , thereafter stopping the vibration . it should be appreciated that the whole process can be performed with one hand holding the apparatus 100 while the skin can be held and manipulated with the other hand as needed . if multiple sites are injected sequentially , the needle can be retracted first , the conical section 112 can be moved to a new site , and the needle can then be extended again . once the process is completed , the syringe is removed from the holder 150 and at least its tip can be disposed . the conical section 102 is wiped with alcohol or other disinfectant and the apparatus 100 is ready to be used again . the apparatus can be sized and shaped to so that it can be used with several syringes of similar sizes , e . g . 1 , 3 or 5 cc , needles from 18 to 25 gauges and injection depth of up to ½ in or more . an apparatus with somewhat larger housing is needed for syringes of 3 , 5 , 10 , 20 or 60 ccs . as illustrated in the figures , the apparatus can be made with only five parts having special shapes and sizes , the rest of the parts being of standard shapes and sizes . the apparatus can be used for many different procedures including pediatric treatments , anesthesia , cosmetic treatments , drawing blood and blood donations , treatments for diabetes , veterinarian treatments , vaccines , etc . obviously numerous modifications may be made to the claims without departing from its scope as defined in the appended claims . for example the housing can be easily adapted to work with automated injection devices .
an apparatus is provided for performing an injection , the apparatus including a front end , a vibrator mechanism selectively vibrating the front end during an injection and a syringe holder holding a syringe during an injection through the front end while the front end is vibrated .